MODEL 68 SR TRIPLEX MOWER MODEL 68 DL TRIPLEX MOWER OWNER'S MANUAL Includes Operation, Maintenance and Parts List NATIONAL MOWER CO. 700 Raymond Ave., P.O. Box 14299 St. Paul, Minnesota 55114-0299, U.S.A. Phone (651) 646-4079 ­ Fax (651) 646-2887 www.nationalmower.com June 2003 ONE YEAR LIMITED WARRANTY For the period of one year from the date of purchase (45 days if the product is used for rental purposes), National Mower Company will repair or replace free of charge, for the original purchaser, any part or parts found by inspection to be defective by our Factory Authorized Service Station or by the Factory at St. Paul, Minnesota to be defective in material or workmanship or both. All transportation charges on parts submitted for repair or replacement under this warranty shall be paid for by the purchaser. This warranty does not include engines, engine parts or tires which are covered under separate warranties furnished by their manufacturer or supplier. All service under this warranty will be furnished and performed by our Factory Authorized Service Stations. THERE IS NO OTHER WARRANTY EXPRESSED OR IMPLIED Warranties, including those of merchantability and fitness for a particular purpose, are limited to one year from purchase or 45 days if the product is rented, and to the extent permitted by law, any and all implied warranties are excluded. The above remedy of repair and replacement of defective parts is the purchaser's exclusive remedy for any defect, malfunction, or breach of warranty. Liability for incidental or consequential damages under any and all warranties is excluded to the extent permitted by law. NATIONAL MOWER COMPANY P.O. Box 14299 700 Raymond Avenue St. Paul, Minnesota 55114-0299, U.S.A. Phone (651) 646-4079 Fax (651) 646-2887 www.nationalmower.com 2 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX TABLE OF CONTENTS Warranty ................................................................................................... 2 Introduction ............................................................................................... 3 Safety Information .................................................................................... 4 Safety and Control Decals ........................................................................ 7 Receipt of Shipment ............................................................................... 11 Uncrating Instructions ............................................................................. 11 Assembly ................................................................................................ 12 Preparation ............................................................................................. 14 Operation ................................................................................................ 14 Maintenance ........................................................................................... 18 Maintenance Record .............................................................................. 26 Troubleshooting ...................................................................................... 27 Parts List ................................................................................................. 28 Frame & Running Gear ................................................................... 28 Running Gear & Misc. Parts - 68 DL ............................................... 30 Seat Mounting & Belt Guards .......................................................... 31 Drive Mechanism - Upper Portion ................................................... 32 Drive Mechanism - Middle Portion .................................................. 34 Drive Mechanism - Lower Portion ................................................... 35 Drive Mechanism - 68 DL ................................................................ 36 Rear Axle & Differential ................................................................... 38 Wing Cutting Units ........................................................................... 40 Rear Cutting Unit ............................................................................. 42 Skids, Reel End Shields & Guards ................................................. 44 Roller & Standard Scrapers ............................................................ 45 Roller Scraper Kit, Dial-A-HeightTM ................................................. 46 Dial-A-HeightTM Roller Adjuster Kit ................................................. 47 Dial-A-HeightTM Adjuster ................................................................. 48 Safety Switches ...................................................................................... 49 Electrical Diagrams ................................................................................. 50 Electrical Parts ........................................................................................ 51 Specifications .......................................................................................... 52 Parts Ordering Information ..................................................................... 53 Declaration of Conformity ....................................................................... 55 INTRODUCTION This manual has been prepared by National Mower Company as an aid to users in the assembly, safe operation, maintenance, adjustment and ordering replacement parts. Additional information will gladly be furnished by calling or writing the manufacturer or his authorized agent. Please furnish us with the Model Number, Serial Number and Date of Purchase when contacting us about your machine. Designations of right, left, front add rear are used as if the operator was sitting in the mower seat. 68OM-06/03 Before operating mower, carefully and completely read this manual. The contents provide you with an understanding of safety instructions and controls during normal operation and maintenance. Understand all safety precautions provided in the manuals. Review control functions and operation of the mower. Do not operate the mower unless all controls function as described in this manual. Review recommended lubrication, maintenance, and adjustments. 3 SAFETY INFORMATION The safety alert words below are used in this manual to identify potentially hazardous conditions. Their definitions are: safety guards are in place at all times, except during servicing. Keep all nuts, bolts, and screws tight. 3. OPERATION Wear approved safety glasses or goggles when operating the mower. Do not allow children to operate mower. Do not allow adults to operate mower without proper instruction. Do not carry passengers. Keep children and pets at a safe distance from an operating mower. Stop the mower if anyone approaches the mower. Disengage all cutting-unit clutches and shift into neutral before attempting to start the engine. Disengage main clutch before shifting cutting-unit clutches. Disengage power to the cutting units and stop the engine before leaving the operator's position. Disengage power to the cutting units and stop the engine before making any repairs or adjustments. Disengage power to the cutting units when transporting or not in use. These symbols mean: ATTENTION! PERSONAL SAFETY IS INVOLVED! BECOME ALERT! OBEY THE MESSAGE! Take all possible precautions when leaving the mower unattended, including shifting into neutral, setting the parking brake, stopping the engine and removing the ignition key. Watch for dangerous traffic when crossing or near roadways. Never direct the discharge of material from operating reels toward bystanders nor allow anyone near the mower. The mower and reels should be stopped and inspected for damage after striking a foreign object. The damage should be repaired before restarting and operating the mower. Proceed as follows when mowing: · Mow only in daylight or in good artificial light. · Never make a cutting height adjustment while the engine is running. · Shut the engine off when removing grass or unclogging reels. This machine is to be used only as a grass cutter or lawn mower. Never operate the mower while using drugs, medications, or alcohol. Safe operation requires complete and unimpaired attention. Never allow anyone to operate the mower when their alertness or coordination is impaired. Do not wear loose clothing or loose shoelaces, which may become entangled in mower controls or drive components. 68OM-06/03 DANGER means "IMMINENTLY HAZARDOUS SITUATION! If not avoided, WILL RESULT in death or serious injury." means "POTENTIALLY HAZARDOUS SITUATION! If not avoided, COULD RESULT in death or injury." WARNING CAUTION means "POTENTIALLY HAZARDOUS SITUATION! If not avoided, MAY RESULT in minor or moderate injury." It may also be used to alert against unsafe practices. The safety alert triangle symbols on your mower point out important safety precautions. NATIONAL MOWER SAFE OPERATING PRACTICES 1. TRAINING Know the control functions and how to stop quickly. READ THE OWNER'S MANUAL. 2. PREPARATION Clear the work place of objects which might be picked up by the blades and thrown. Handle fuel with CAUTION - it is highly flammable. · Use an approved fuel container. · Never remove the fuel tank cap or add fuel to a running or hot engine. Never fill the fuel tank indoors. Wipe up spilled fuel immediately. · Open garage doors to allow ventilation if engine is run inside ­ exhaust fumes are dangerous. Do not run engine in any enclosed area. Keep the mower in safe operating condition. Make sure that all safety switches are operating properly and all 4 ® NATIONAL 68 SR & DL TRIPLEX Do not mow in reverse, unless absolutely necessary. Always look down and behind before and during reverse motion. Shut off and raise the cutting units before operating the mower at transport speed. (Model 68 DL only.) Do not reverse battery connections. Damage to the mower can result. Battery gases are explosive and can cause death or injury. Keep open flames, sparks, and smoking materials away from batteries. Battery fluid contains sulfuric acid. Contact with skin, eyes, or clothing can cause chemical burns. Wash immediately and seek medical assistance. Wear protective clothing and safety glasses when handling a battery. (Model 68 DL only.) 4. HILL OPERATION Do not stop or start suddenly when going uphill or downhill. Mow up and down the face of steep slopes -- never across steep slopes. Do not exceed a slope of 15o in any direction. Reduce travel speed on slopes and in sharp turns to prevent tipping or loss of control. Use extreme caution when changing direction on slopes. Watch for holes in the terrain and other hidden hazards. Do not shift into neutral and coast downhill. Use extreme care when mowing near dropoffs or embankments. The mower could roll over if a wheel goes over the edge, or if an edge caves in. If mower stops going uphill, disengage power to the cutting units and slowly back down. 5. MAINTENANCE Never store the mower, with fuel in the tank, inside a building where fumes could reach an open flame or spark. Allow the engine to cool before storing in any enclosure. Keep the engine free of grass, leaves or excessive grease to reduce a fire hazard. Do not change the engine governor settings or overspeed the engine. Keep non-skid surfaces clean. Replace the non-skid material if worn, damaged, or missing. Wear appropriate safety gear, including safety glasses and gloves, while servicing the mower. Never mow while people, especially children, or pets are nearby. Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people or their property. Do not carry passengers. All drivers should seek and obtain professional and practical instruction. Such instruction should emphasize: · the need for care and concentration when working with ride-on machines; · control of a ride-on machine sliding on a slope will not be regained by the application of the brake. The main reasons for loss of control are: · insufficient wheel grip; · being driven too fast; · inadequate braking; · the type of machine is unsuitable for the task: do not use mower for unsuitable tasks; · lack of awareness of the effect of ground conditions, especally slopes; · hitching and load distribution: do not hitch or tow other devices. 2. PREPARATION Gasoline (petrol) is highly flammable. Store fuel in containers specifically designed for this purpose. Refuel outdoors only. Do not smoke while refuelling. Add fuel before starting the engine. Never remove the cap of the fuel tank or add fuel while the engine is running or when the engine is hot. If fuel is spilled, do not attempt to start the engine but move the machine away from the area of spillage and avoid creating any sources of ignition until fuel vapors have dissipated. Replace all fuel tanks and container caps securely. WARNING While mowing, always wear substantial footwear and long trousers. Do not operate the equipment when barefoot or wearing open sandals. Thoroughly inspect the area where the equipment is to be used and remove all objects which can be thrown by the machine. Replace faulty silencers. Before using, always visually inspect to see that the reels, bed knives, and cutting unit assemblies are not worn or damaged. Replace worn or damaged reels and bedknives in sets to preserve balance. On multi-reel machines, take care as rotating one reel can cause other reels to rotate. ISO SAFE OPERATING PRACTICES 1. TRAINING Read the instructions carefully. Be familiar with the controls and the proper use of the equipment. Never allow children or people unfamiliar with these instructions to use the lawnmower. Local regulations can restrict the age of the operator. 68OM-06/03 5 SAFETY INFORMATION 3. OPERATION Do not operate the engine in a confined space where dangerous carbon monoxide fumes can collect. Mow only in daylight or good artificial light. Before attempting to start the engine, disengage all cutting unit clutches and shift into neutral. Do not use on slopes of more than 15°. Remember there is no such thing as a safe slope. Travel on grass slopes requires particular care. To guard against overturning: · do not stop or start suddenly when going up or downhill; · engage clutch slowly, always keep machine in gear, especially when travelling downhill; · machine speeds should be kept low on slopes and during tight turns; · stay alert for humps and hollows and other hidden hazards; · never mow across the face of the slope, unless the machine is designed for this purpose. Watch out for traffic when crossing or near roadways. Stop the reel rotation before crossing surfaces other than grass. Never direct discharge of material toward bystanders or allow anyone near the machine while in operation. Never operate the lawnmower with defective guards, or without safety devices in place. Do not change the engine governor setting or overspeed the engine. Operating the engine at excessive speed can increase the hazard of personal injury. Before leaving the operator's position, · disengage the power take-off and lower the cutting units; · shift into neutral and set the parking brake; · stop the engine and remove the key. Disengage drive to the cutting units, stop the engine, remove the ignition key, and disconnect the spark plug wire: · before cleaning blockages or unclogging chute; · before checking, cleaning, or working on the machine; · after striking a foreign object. Inspect the lawn mower for damage and make repairs before restarting and operation the lawn mower; · if lawn mower starts to vibrate abnormally (check immediately). Disengage drive to attachments when transporting or not in use. Stop the engine and disengage drive to attachment: · before refuelling; · before removing the grass catcher; · before making height adjustment; · before cleaning blockages; · before checking, cleaning, or working on the mower; · after striking a foreign object. Inspect the mower for damage and make repairs before restarting and operating the equipment. Reduce the throttle setting during engine shutdown and turn the fuel off at the conclusion of mowing. 4. MAINTENANCE AND STORAGE Keep all nuts, bolts, and screws tight to be sure the equipment is in safe working condition. Never store the equipment with fuel in the tank inside a building where fumes can reach an open flame or spark. Allow the engine to cool before storing in any enclosure. To reduce the fire hazard, keep the engine, silencer, battery compartment, and fuel storage area free of grass, leaves, or excessive grease. Replace worn or damaged parts for safety. If the fuel tank has to be drained, this should be done outdoors. When machine is to be parked, stored, or left unattended, lower the cutting means unless a positive mechanical lock is used. Be careful during adjustment of the machine to prevent entrapment of the fingers between moving blades and fixed parts of the machine. On multi-reel machines, take care as rotating one reel can cause other reels to rotate. CALIFORNIA SAFE OPERATING PRACTICES Mowers used in California, USA are required by law (CA PRC 4442 & CA H & SC 13005) to have their engines equipped with spark arresters when operating in flammable vegetation. Arresters must be obtained from your engine dealer and are not available from National Mower Company. 6 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX SAFETY AND CONTROL DECALS Safety decals and instructions are located on the mower near the controls or near areas of potential hazards. Worn, damaged, or loose decals must be replaced. The decal part number and the location of the decal on the mower are listed next to each decal. 07584 ­ TRANSPORT CLUTCH PEDAL (Model 68 DL) (located on top surface of engine belt guard) Pressing the pedal will cause the mower to run in high-speed transport mode. Operate the transport clutch by slowly pressing the pedal with your left foot. Releasing the pedal will cause the mower to coast to a stop, or resume mowing speed. Before using, disengage the cutting unit clutches and raise the cutting units to their transport position. NEVER USE THE TRANSPORT CLUTCH WHILE THE CUTTING UNITS ARE TURNING, OR WHEN THE DIFFERENTIAL SHIFT IS IN REVERSE. 07581 - MAIN ENGINE CLUTCH LEVER (located on top surface of engine belt guard) Move lever backward to put clutch in neutral position, forward to cause mower to travel (direction depends on differential shift position). WARNING Engage the clutch slowly. Refer to instructions in the OPERATIONS section WARNING 07585 ­ ENGINE THROTTLE (located on steering wheel) 07582 - DIFFERENTIAL SHIFT LEVER (located on top edge of differential gear drive) Move the shift lever and set it in the notch to place the differential into Forward, Neutral, or Reverse. NEVER SHIFT THE DIFFERENTIAL WITH THE MOWER IN MOTION OR THE MAIN ENGINE CLUTCH ENGAGED. Move the engine throttle lever forward for fast speed, backward for slow speed 07586 ­ IGNITION KEY (Model 68 DL) 07583 ­ WING MOWER CLUTCH (located on top surface of main belt guard) Move the clutch lever back to engage the wing mower clutch. Move the lever forward to put the clutch in neutral. (located on instrument cluster panel) To start the engine, sit on the seat and place all cutting unit clutches in neutral. Turn the key to the full clockwise position to start the engine. Use the choke as required. Once the engine has started, release the key and allow it to rotate to the central run position. To stop the engine, turn the key to the full counterclockwise position. Refer to the engine manual for details on proper engine operation. Disengage cutting unit clutches, engage the parking brake and remove the key whenever leaving the mower seat. 7 68OM-06/03 SAFETY AND CONTROL DECALS 07587 ­ IGNITION KEY (Model 68 SR) (located on top surface of main belt guard) To start the engine, place the main clutch and all cutting unit clutches in neutral. Turn the key to the clockwise position and pull on the recoil starter. Use the choke as required. To stop the engine, turn the key to the full counterclockwise position. Refer to the engine manual for details on proper engine operation. Disengage cutting unit clutches, engage the parking brake and remove the key whenever leaving the mower seat. 07599 ­ WARNING DECAL (located on instrument cluster [68 DL] or main belt guard [68 SR]) Read and understand the information in the Owner's Manual before operating this mower. Read and understand the information in the Owner's Manual before attempting to repair, service, or maintain this mower. Turn off the mower engine, remove the ignition key, and disconnect the engine spark plug before attempting to repair, service, or maintain this mower. 07588 ­ PARKING BRAKE LEVER (located on top surface of main belt guard) Move the parking brake lever forward to set the brake, rearward to release the brake. Driving the mower with the parking brake set will cause excess wear on the brake mechanism. The engine exhaust from this product contains chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. Do not operate the engine in a confined space where dangerous carbon monoxide fumes can collect. WARNING WARNING Objects may be thrown from the cutting units. Keep bystanders away from the mower. 07589 ­ SERVICE BRAKE PEDAL (located on top surface of main belt guard) Press the brake pedal with your right foot to stop the mower. You must also release the main engine clutch in order for the mower to come to a complete stop. Never allow the mower to freewheel down hills without the traction drive engaged. Serious injury or death can result from loss of control. DANGER WARNING Do not operate the mower on slopes greater than 15 degrees. 8 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX 07083 ­ SERIAL NUMBER DATA PLATE (located on mower frame, left side, below seat) 07590 ­ REAR CUTTING UNIT CLUTCH (located on top surface of rear cutting unit) Pull lever forward and toward the center of the machine to engage sliding jaw clutch. To disengage, pull lever forward and out to engage locking pin. Never engage the drive unless the rear cutting unit has been lowered to the cutting position. (Note that the decal is viewed properly while looking toward the rear of the mower.) 07600 ­ CUTTING UNIT DANGER (located on top surface of each cutting unit) Reels and bed knives on the cutting units are sharp. Keep hands and feet away from the cutting units. DANGER 07595 ­ MANUFACTURER & SOUND LEVELS (located on left side of main belt guard) Guaranteed sound power level and manufacturer's information Do not attempt to work around the cutting units while they are running. Your fingers, hands, arms, or any loose clothing may become entangled in the belt drives. Do not operate the cutting units unless you are seated on the mower. Keep all guards and shields in place. DANGER 205341 ­ INSTRUCTIONS for OPTIONAL DIAL-AHEIGHT ADJUSTER (located on the top shield of each cutting unit) 07415 ­ MODEL 68 DL LABEL (68 DL only) 07598 ­ MODEL 68 SR LABEL (68 SR only (located on left side of engine belt guard and right side of main belt guard) Raise and turn the adjuster knob counterclockwise to lower the height of cut. Raise and turn the adjuster knob clockwise to raise the height of cut. Read the instructions for the Dial-A-Height adjusters in the Operations section of this manual. 9 68OM-06/03 SAFETY AND CONTROL DECALS 205399 ­ Optional DIAL-A-HEIGHT SCALE (Rear cutting units) 205346 ­ Optional DIAL-A-HEIGHT SCALE (Wing cutting units) (located on each Dial-A-Height bracket) Align the bottom edge of the Dial-A-Height bracket with the desired height of cut on this decal. Read the instructions for the Dial-A-Height adjusters in the Operations section of this manual. 10 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX RECEIPT OF SHIPMENT Carefully inspect your machine and crate for damage that could have occurred during shipment. If damages or shortages are noted, have the transportation company's representative note this on the bill of lading. Note: Claims for shipping damages must be noted by the consignee at the point of destination and filed with the transportation company that delivers the shipment. UNCRATING INSTRUCTIONS CAUTION Wear protective gloves. Steel banding is sharp. Handle cutting units carefully. Reels rotate freely and are very sharp. 3. Unbolt Seat (3) from crate bracing and lay seat aside for installation later. 4. Lift Rear Cutting Unit (4) off the crate supporting members and set aside for later attachment. 5. Make sure Wing Cutting Units (5) are in their upright positions, secured to the mower frame with Wing Cutting Unit Latches. 6. Knock down all sides of crate and remove. Roll mower backwards off of crate base. In order to prevent possible damage to the machine or personal injury, the following uncrating procedure must be followed: 1. Position Crate (1) on a hard, level surface. 2 Cut and remove all Steel Banding (2). Remove the entire top of the crate. CAUTION CAUTION 68OM-06/03 11 ASSEMBLY WARNING Improper assembly or adjustments can cause serious injury. SEAT 1. Mount the Rear Cutting Unit Lifter and Seat Assembly (A) to the mower frame using (2) 1/2" bolts, nuts, and washers (B). 2. Fasten the seat slides (C) to the bottom of the seat (D) using the fasteners provided with the slider mechanisms. Orient the slider so the adjuster lever (E) is on the operator's left hand side. 3. Remove the seat switch bracket (F, 1" x 10" bar)) mounted near the ends of the legs of the seat hinge. Discard the fasteners. Mount the seat and slider assembly onto the seat hinge (G). Replace the seat switch bracket and tighten fasteners. Plug the wire harness socket (H) into the seat safety switch (J). Use care in routing the wires so that they are not pinched by the switch lever or seat support mechanisms. REAR CUTTING UNIT 1. Pivot the Seat Brace (A) from the axle so that the top end aligns with the tab at the back of the seat hinge assembly. Fasten with a 5/16" x 1" Hex Head Bolt, Lock Washer and Hex Nut. 2. Slide the rod end of the lifter tee (B) through the hole (C) in the pad on the rear mower frame and secure it to the lift arm pivot with the cotter pin and washer as shown at (D). 3. Attach the Pull Rod (E) to the cutting unit Pivot Tube (F) with Pin and Spacers. NOTE: Before completing assembly, it will be necessary to adjust the drive belt tension. See "Rear Cutting Unit Drive Belt Tension" in the Maintenance section of this manual, page 23. 12 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX WING CUTTING UNITS 1. Remove the two Wing Cutting Unit Belts from the steering column. 2. Release the Laches (A) from Wing Cutting Units. To release the latch, lift the wing cutting unit handle until the latch swings upward into a nearly vertical position. Carefully lower the cutting unit to the ground. Avoid dropping the cutting unit, as damage may result to the cutting unit, the mower, or your turf. 3. Slip wing Cutting Unit belts (B) over Countershaft Pulleys (C). 4. Block mower wheels to prevent mower from moving forward. Pull Wing Cutting Units (D) forward so that they slide on Pull Rods (E) and compress springs (F). This will allow enough slack to enable belts to be installed over Reel Pulleys (G). 5. Pull Cutting Units backwards to adjust belt tension. Tighten bolt (H) to lock in place. REEL TO BED KNIFE ADJUSTMENT To prevent damage during shipment, the reels have been moved away from the bed knives at the factory. Follow the procedure for "Reel to Bed Knife Adjustment" in the Maintenance section of this manual to properly adjust your cutting units. REAR CUTTING UNIT BELT Install Rear Cutting Unit Belt (A) from Countershaft Pulley (B) to outer Drive Pulley (C). Idler Pulley (D) must ride on top of lower belt to provide proper tension. NOTE: It will be necessary to raise rear cutting unit to allow enough slack to get belt over pulleys. ENGINE MOWER IS SHIPPED WITH DRY ENGINE. DO NOT START ENGINE UNTIL OIL IS ADDED TO CRANKCASE. See Engine Manual for additional information. CAUTION DIFFERENTIAL Grease has been installed in the differential at the factory. For additional information, refer to the Maintenance section of this manual. 68OM-06/03 13 PREPARATION Handle cutting units carefully with protective gloves. Reels and bed knives are very sharp. Reels rotate freely and rotating one reel can cause other reels to rotate. DANGER FUEL - Check fuel level. Add fuel as required. Refer to the engine manual for type of fuel and other safety requirements. ENGINE COOLING - Keep engine cowlings clear of clippings. LUBRICATION - Add lubricant to pivots and other lubrication points as required. Refer to the lubrication chart in the Maintenance section of this manual. REELS CLEAR OF DEBRIS - Remove any debris that may be tangled in the cutting reels. Keep the reel shaft and bearing clean of grass or other debris buildup. SAFETY SWITCH OPERATION - Check operation of all safety switches. Do not use mower if safety switches are disconnected or not operational, as dangerous conditions will result. Moving machinery can be dangerous if not operated properly. Follow all safe operating suggestions listed in the Safety Information section of this manual. CAUTION Check the following items before each use of the mower. TIRE PRESSURE - Use a tire pressure gage to check the tire pressure. Fill tires with compressed air as needed to obtain the pressure labelled on the sidewall of the tire. ENGINE OIL - Check level on dipstick. Refer to the engine manual for instructions on adding oil and which oil viscosity to use. OPERATION The following is a description of the machine controls and their function. A. Main Clutch Lever Engage slowly before full engagement. Always disengage the drive when stopping or leaving the machine. The engine clutch lever has an electrical interlock and engine will not start if clutch is engaged. For added safety, the interlock system should be checked periodically to ensure that it is adjusted to function properly. B. Engine Throttle Lever ­ Regulates mowing and travel speeds. Moving the control handle back will reduce engine speed for starting and idling engine. Push forward to increase engine speed. Never travel at speeds faster than required for proper mowing. C. Wing Cutting Unit Clutch Lever ­ Engages drive to Wing Cutting Units. Pull lever back and down to engage. Never engage drive unless Wing Cutting Units have been lowered to cutting position. WARNING Engages power for travel and mowing. Down position is disengaged and up position is engaged. Engine Choke Lever (No photo) - Located near the upper rear right corner of the engine. Use the choke when starting a cold engine. See the engine manual for engine starting information and proper use of the choke. 68OM-06/03 14 ® NATIONAL 68 SR & DL TRIPLEX OPERATION D. Transport Clutch (Model 68 DL only) NEVER USE THE TRANSPORT WARNING CLUTCH WHILE THE CUTTING UNITS ARE TURNING OR WHEN THE DIFFERENTIAL SHIFT IS IN REVERSE. G. Rear Cutting Unit Clutch Engages drive to the Rear Cutting Unit. Pull lever forward and toward the center of the machine to engage sliding jaw clutch. To disengage, pull lever forward and out to engage locking pin. Never engage the drive unless the rear cutting unit has been lowered to the cutting position. Use this clutch to travel between mowing sites at speeds faster than those obtained with the main clutch. Before using, disengage the cutting unit clutches and raise the cutting units to their transport position. H. Rear Cutting Unit Lift Arm Operate the transport clutch by slowly pressing the pedal with your left foot. Releasing the pedal will cause the mower to coast to a stop, or resume mowing speed. Raises rear mower to the transport position. Pull handle up, forward and over center to lock it in the up position. E. Wing Cutting Unit Latch WARNING NEVER ATTEMPT TO RAISE THE WING CUTTING UNITS WHEN THE WING MOWER CLUTCH IS ENGAGED. J. Seat Position Adjuster Lever The Wing Cutting Units should be latched in their elevated position whenever the mower is being transported or in storage. If needed, push the latch (E) down to a generally horizontal position. Grasp the Wing Cutting Unit lift handle (not shown) and raise the cutting unit until the latch (E) engages the lift arm socket (F). To release the latch, lift the handle until the latch (E) swings upward into a nearly vertical position, then carefully lower the cutting unit onto the ground. Avoid dropping the cutting unit, as damage may result to the cutting unit, the mower, or your turf. WARNING DO NOT OPERATE THE SEAT SLIDE MECHANISM WHILE THE MOWER IS MOVING The seat may be moved forward or backward to suit the operator. Pull the lever near the front left corner of the seat outward to release the slide mechanism. After moving the seat to a comfortable position, release the lever to lock the slide mechanism. . 68OM-06/03 15 OPERATION K. Ignition Switch (Model 68 DL shown) CAUTION ALWAYS SHUT OFF THE ENGINE AND REMOVE THE KEY BEFORE LEAVING THE MOWER SEAT. The 68 DL ignition switch is located on the instrument cluster. It is a threeposition switch. M. Parking Brake Lever Provides a lock for the brake. Push brake lever forward, over center, to lock. Pulling brake lever back, toward the rear of the machine will disengage the brake. N. Service Brake Depress the Service Brake foot pedal to slow the mower and lock the rear wheels in the full stop position. Note: It is best to slow the mower with the throttle and then disengage clutch lever before applying brake. This prevents excessive wear and engine overload. Turn the key clockwise to the middle position to activate the electrical system. Turn the key to the full clockwise position to start the engine. Turn the switch counterclockwise to shut off the engine. The 68 SR ignition switch (not shown) is located on the steering column. It is a two-position switch. Turn the key clockwise to activate the electrical system and allow the engine to be started. Turn the switch counterclockwise to shut off the engine. SAFETY SWITCHES Your National 68 mower is equipped with safety switches to monitor the operating conditions of certain machine functions and stop the mower whenever unsafe conditions are found. It is necessary for both the main engine clutch and the wing cutting unit clutch to be in their neutral position to start the engine. The 68 DL also requires the operator be in the seat. The 68 SR does not require the operator to be in the seat to facilitate use of the hand recoil starter. If you encounter difficulties starting the mower's engine, or keeping it running, check the chart in the Safety Switches section of this manual to make sure you are not causing the engine to kill or become unable to start. L. Differential Shift Lever Never shift while machine is in motion, as damage to the gears could result. Always disengage engine clutch before attempting to shift. WARNING Located on the mower differential, this control has three positions: Forward, Neutral (center position), and Reverse. The lever must be pulled toward the center of the machine to clear the notch in the stop disc and positioned securely in the new notch. 16 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX HEIGHT OF CUT ADJUSTMENT To assure safety, disengage the engine clutch lever, remove the ignition key, and disconnect the engine spark plug wire prior to making any of the following adjustments. 2. DIAL-A-HEIGHT ADJUSTERS (OPTIONAL) To set the height of cut, lift the vinyl cap and socket (A) off the adjuster tube. To raise the height of cut, turn the socket clockwise (viewed from above). To lower the height of cut, turn the socket counterclockwise. Each quarter turn (90°) of the socket will raise or lower the height of cut by approximately 1/32". A full turn (360°) will raise or lower the height of cut approximately 1/8". When making large adjustments (over 1/2"), make small adjustments to each side until the desired change is reached. When the desired height is achieved, lower the socket and make sure the adjuster tube locks it in position. The scale decal (C) on the rear side of the adjuster indicates the height of cut. To use it, sight along the bottom edge of the adjuster tube (B). The reading on the scale is your approximate height of cut. You should determine the exact settings by test mowing your turf. If very accurate cutting heights are required, place the cutting units on a hard, level surface and place a board or other gauge plate of the desired height under each bed knife backing bar. Lower the rollers to the level surface. When completed, make sure the socket is locked in position over the adjuster tube. DANGER 1. STANDARD ADJUSTERS The height of cut is variable and may be adjusted on both wing cutting units and the rear cutting unit by loosening the top and bottom Adjusting Nuts (A) which hold Roller Adjusters (B) in Roller Brackets (C). Roller (D) may then be moved up and down. It is important to get all rollers adjusted to the same height so that there will be uniform cutting across the entire width of the cutting unit. Do not adjust by sight. Place the mower on a hard, level surface and place a board or gauge plate of the desired height under each bed knife back bar. Allow the rear roller to rest on the level surface. Retighten the adjusting nuts and remove the gauge plate or board. DIAL-A-HEIGHT ADJUSTER (OPTIONAL) OTHER ADJUSTMENTS STANDARD HEIGHT ADJUSTER NOTE: Guards removed or cut away to show detail For other machine adjustments, see the Maintenance section of this manual. 68OM-06/03 17 MAINTENANCE LUBRICATION Lubricate the machine at the recommended locations and intervals using the proper lubricants to ensure maximum service and long life of your machine. Lubrication locations must be free of dirt and grass clippings and be well lubricated for proper operation. The location and number of all lubricating points are listed in the chart below. The type and frequency of lubrication is specified. Use the following photos to locate the lubrication points on the mower. DIFFERENTIAL Since the mower does not operate at high speeds, the grease level in the differential is not critical providing that there is sufficient grease to coat the gears. Unless ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 LOC ATION AN D N U MB ER Front wheel beari ngs (2) Steeri ng ki ngpi n (2) Front axle to frame pi vot (2) Steeri ng column (2) Brake pedal pi vot (1) Idler pi vot bracket (1 - 68 D L only) Mai n engi ne clutch handle (1) Wi ng mower clutch handle (1) Upper countershaft (1) Lower countershaft (1) Wi ng mower pull rods (4) Rear axle (2) Input-shi ft tube (1) Brake drum tube (1) Mai n axle tube (1) Seat hi nge (2) Rear mower li ft arm pi vot (1) Rear mower pi vot tube (1) Rear mower countershaft (2) Rear mower clutch (2) Wi ng mower li ft arm pi n (4) C utti ng reel beari ngs (6) Hei ght of cutter adjuster threaded shaft (6) Threaded shaft and bracket (6) Swi vel block (6) Belt clutch i dler arm (68 D L only) Transport clutch foot pedal (68 D L only) leakage is evident, it is recommended that the grease be checked once each year. Check grease level by loosening the bolts in the differential case flanges and spreading case halves. It is not necessary to totally disassemble the case or remove the wheels for this inspection. Add Multipurpose Gear Grease such as Pennzoil No. 303 or equivalent if necessary. Total grease capacity is 1-1/2 pounds (0.68 kg). CAUTION ENGINE Do not use oil in the differential case in place of grease­it will leak through the seals. Refer to the engine manual (separately furnished) for proper lubrication and maintenance instructions. TYPE Grease Grease Grease Grease Oi l Grease Oi l Oi l Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease Grease FR EQU EN C Y D ai ly 25 hours 25 hours 25 hours D ai ly 25 hours D ai ly D ai ly D ai ly D ai ly D ai ly or as requi red 25 hours 25 hours 25 hours 25 hours D ai ly 25 hours 25 hours D ai ly D ai ly 25 hours D ai ly Yearly or as requi red Yearly or as requi red Yearly or as requi red D ai ly D ai ly 68OM-06/03 18 27 ® NATIONAL 68 SR & DL TRIPLEX LUBRICATION POINTS 1. Front wheel bearing 2. Steering Kingpin 9. Upper countershaft 3. 4. 5. 6. Front axle pivot Steering column (2 places) Brake pedal pivot Idler pivot bracket (68 DL only) 10. Lower countershaft 7. Main clutch handle 8. Wing mower clutch handle 68OM-06/03 11. Wing mower pull rod (2 places) 19 MAINTENANCE LUBRICATION POINTS 18. Rear mower pivot tube 12. 13. 14. 15. Rear axle (2 places) Differential input tube Brake drum tube Main axle tube 19. Rear mower countershaft (2 places) 20. Rear mower clutch 16. Seat Hinge 21. Wing mower lift arm (2 places) 17. Rear mower lift arm pivot 20 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX LUBRICATION POINTS 22. Cutting reel bearing (6 places) 23. Height of cut adjuster (6 places) Dial-A-Height adjusters (optional) 24. Threaded shaft (6 places) 25. Swivel block (6 places) Belt clutch arm pivot arms (68 DL only) 26. Belt clutch idler arm 27. Transport clutch foot pedal 68OM-06/03 21 MAINTENANCE To assure safety, disengage the engine clutch lever, remove the ignition key, and disconnect the engine spark plug wire prior to making any of the following adjustments. Do not adjust one side more than the other unless the reel is obviously out of alignment. Do not get the reel so tight that it is hard to turn by hand. A too tight reel will wear faster. Ideally, the reel should "wipe" or lightly touch the bed knife. It is not necessary to adjust or change the position of the lower adjustment nut. Proper cutting action may be tested by holding paper strips between the reel and the bed knife. Turn the reel by hand and check to see if the assembly cuts the paper all the way across the width of the bed knife. Make sure that the adjusting and the locking nuts on both side are tightened securely. REEL END PLAY ADJUSTMENT Test for end play periodically by trying to move the reel from side to side in the frame. If there is ANY movement, adjust the bearings by loosening the lock nut on the adjustment bolt (B) which is located on the inside right end of the reels, and turning the adjustment bolt IN one half turn or less. Do not overtighten. An overtightened bearing will cause excessive bearing wear. Test again for end play and if reel is rotating freely and end play is not noticeable, tighten the lock nut. HEIGHT OF CUT ADJUSTMENT Refer to "Height of Cut Adjustment" in the Operation section of this manual. BRAKE ADJUSTMENT The foot brake is properly adjusted if it slows the machine when depressed and can be locked when the pedal is depressed fully. Adjust brake tension by removing cotter pin and brake pedal pin and turning brake clevis located under pedal on brake rod. When adjustment is complete, attach clevis to pedal with pin and cotter pin. DANGER Handle reel assemblies carefully with protective gloves. Reels are very sharp. Reels rotate freely and rotating one reel can cause other reels to rotate. Special care should be taken in the area where the reel contacts the bed knife. DANGER REEL TO BED KNIFE ADJUSTMENT The reel is adjusted to a fixed position bed knife. This construction allows a more rugged and durable frame and retains the proper adjustment longer. The Reel Adjuster Bolt (A) regulates reel distance from the bed knife. To reduce the distance, turn the upper hex adjuster nut on each side of the reel down. Proceed slowly and do not over-adjust -- use about 1/8 of a turn on each side at first. REEL ADJUSTMENTS NOTE: Guards removed or cut away to show detail 22 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX ADJUSTING DRIVE BELT TENSION A belt adjusted for proper tension can be deflected slightly at a point midway between the pulleys. An over-tight belt will cause excessive bearing wear and an under-tight belt allows slipping, causing excessive belt wear. IMPORTANT: Never allow oil to get on the belt which could cause slipping. WING CUTTING UNIT DRIVE BELT TENSION Adjust tension by loosening set screw (B) in the wing mower pull arm, sliding the Cutting Unit rearward and retightening set screw. MAIN DRIVE BELT TENSION (Main Countershaft to Rear Drive) Belt tension is increased by loosening the four bolts holding the Upper Countershaft Housing (A) and sliding the housing forward in the slotted frame holes. NOTE - It will be necessary to remove belt guards to reach the adjustment bolts. Also, if this belt is adjusted, it will be necessary to readjust the engine belt. Replace all belt guards before using the mower. FRONT OF MACHINE ENGINE DRIVE BELT TENSION (Engine to Main Countershaft) (No photo) Belt tension is increased by loosening the four engine mounting bolts and sliding the engine forward in the slotted frame holes. Test for the proper tension as detailed in the section "Wing Cutting Unit Drive Belt Tension". When tension is correct, tighten all the bolts securely. REAR CUTTING UNIT DRIVE BELT TENSION Spacers (A) are provided on the rear mower Pull Rod (B) to adjust the belt tension. Remove Pin (C) from the end of the pull rod and slip out the pull rod from the Pivot Tube (D). Move as many spacers as necessary to the location indicated and reassemble. 68OM-06/03 23 MAINTENANCE REAR CUTTING UNIT CHAIN TENSION A chain drive is located on the left side of the rear cutting unit. It maybe helpful to remove the Chain Shield (A) prior to adjusting the chain tension. Adjust the tension of the chain by loosening the 4 bolts (B) on the rear cutting unit countershaft housing. Rotate the countershaft housing (C) about the pivot line created by the fixed bolts. The slots on the countershaft housing will slide over the remaining two bolts. Rotate the countershaft housing until proper chain tension is achieved. Tighten bolts. Proper tension is achieved when the chain is slightly loose, but does not deflect more than 1/2" when pressed in the middle of the span between the two sprockets. BED KNIFE REPLACEMENT DANGER Reels and bed knife are sharp. Wear gloves to avoid cutting fingers on sharp edges. Wear safety glasses to protect eyes. When the bed knife becomes damaged or too worn to keep sharp, it must be replaced. Follow the procedure below. 1. The backbar (A), bed knife (B) and fasteners (C,D) have been assembled at the factory under tension. To ease replacement and prevent misalignment of components, you may wish to clamp the leading edge of the backbar in two or three places before removing the old fasteners. 2. Remove the old shoulder nuts (C) and flat head screws (D). If shoulder nuts are badly rusted or corroded, they may have to be cut off and screws driven out to be removed. 3. Clean the bottom surface of the backbar for maximum metal contact with the new bed bar. 4. Fasten the new bed knife to the bottom of the backbar in the position shown (bent edge up). Shoulder of shoulder nuts (C) must be seated firmly in the backbar and screws (D) must be flush with the bottom of the bed knife. 5. Torque shoulder nuts 35 to 40 ft-lbs. 24 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX BACK LAPPING PROCEDURE Be extremely careful not to let the brush, your fingers or your clothing get caught in the reels. Wear gloves to avoid cutting fingers on sharp edges. Wear approved safety glasses to protect your eyes from flying particles and abrasives. DANGER BACK GRIND IN THE DIRECTION OF THE ARROW INTRODUCTION Back lapping is a very important step in maintaining sharp reel blades on the cutting units. This procedure should be performed when the reel blades and the bed knife become slightly rounded and the grass is not cut cleanly with only a slight reel to bed knife adjustment. Also, after grinding the bed knife and reels, you should back lap to establish a perfect match between the bed knife and reel blades. RECOMMENDED STEPS 1. Adjust the reel to the bed knife so that the bed knife is parallel to the reel and light contact is maintained. 2. Reels must be run in a reverse direction to be lapped. Remove the lower drive belts and attach a back lapping machine (not supplied by National Mower) to the reels. Follow the instructions furnished by the machine manufacturer. 3. Apply the lapping compound with the reels running, using a 2" or a 3" (5 - 7.5 cm) brush. Apply the compound evenly to the moving blades. Many types of compounds are available for lapping. We recommend a good pre-mixed water soluble compound. Pre-mixed compound saves the time required to mix, eliminates the waste of abrasive, rinses off easily with water and is available in all grit ranges from coarse to extra fine. 4. Stop the reel and examine both bed knife and reel blades to see that the cutting edges are uniformly sharp. If not, gradually tighten the reel adjuster bolts (see "Reel to Bed Knife Adjustment" above) and repeat Step 3 until the proper sharpness results. 5. Rinse off the compound thoroughly with water to remove all abrasive. Check for sharpness and readjust the bed knife if necessary. Reel to bed knife contact should be adjusted to easily cut a sheet of paper (see "Reel to Bed Knife Adjustment" above). GRINDING BED KNIVES For maximum cutting efficiency, grind bed knife top and front edges at 5° as shown in the figure. GRINDING REELS Reels must be ground at 25° in the direction shown by the arrow in the figure. Back grind until reel blades are free from roundness, dents and nicks. Spin grind to remove all burrs. All blades must be on the same diameter. 25O Note position of blades to reel axis 5O 5O 68OM-06/03 25 MAINTENANCE RECORD Date Maintenance Task Person 26 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX TROUBLE-SHOOTING DANGER All adjusting must be made with the engine off. Do not do any investigation of the working parts of the machine with the motor running. Always turn the engine off! Tractor Unit Situation Engine will not start Things To Check Turn ignition switch to on Ensure that there is sufficient gasoline (petrol) in the tank Make sure safety switches are making contact and mowing clutch is in neutral Look for a loose wire on ignition or spark plug wire not connected Interlock system inoperative--check wiring, see "Electrical Diagrams" Operator must be positioned on seat to depress safety switches (Model 68 DL only) Differential gear selector must be in one of the drive positions Engine drive clutch must be engaged Drive belts too loose (see "Drive Belt Tension" in Maintenance section) Visually check to see that pulleys are not slipping on shafts If everything above is OK, check for a damaged gear(s) in the differential gear box Ensure that the main clutch is disengaged (brake will not stop engine) Brake adjustment or service may be needed. Mower will not move Mower will not stop Cutting Units Situation Cutting units will not turn. Things To Check Clutches may not be engaged Look for anything that could be jammed between the reel and the bed knife Drive belts or drive chain may need tightening Visually check that both the drive pulleys and the shafts are rotating Reel bed knife position may be out of adjustment (see "Reel to Bed Knife Adjustment" in Maintenance section) Drive belts or drive chain may need adjustment. Visually check that both the drive pulleys and the shafts are rotating Disengage all clutches Cutting units turn but will not cut Cutting units will not stop turning Uneven cut Set height of cut to the same height on each cutting unit (see "Cutting Height Adjustment" in Operation section of this manual.) Check to see if any part is bent Something may be jammed in cutting unit pivots and/or lift pivots, preventing the cutting units from floating 27 68OM-06/03 PARTS LIST FRAME & RUNNING GEAR 28 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX FRAME & RUNNING GEAR Item Part No. Description Qty. 1 FRAME 200002 1 2 REAR TIRE & WHEEL ASSEMBLY 07018 2 3 FOOT REST, Left Hand 200085 1 ________________________________________________________________________________________________________________________________________ 4 BUSHING, Axle Pivot 201961 2 5 BUSHING, Spindle and Steering Post 06002 6 6 DRAG LINK 09014 1 _______________________________________________________________________________________________________________________________________ 7 KING PIN, Left Hand 200193 1 8 TIRE & WHEEL 07038 2 9 SHAFT, Steering 200094 1 ________________________________________________________________________________________________________________________________________ 10 AXLE ASSEMBLY, Front 201427 1 11 TIE ROD 201851 1 12 PIN, Clevis Tie Rod 04003 1 ______________________________________________________________________________________________________________________________________________ 13 KING PIN, Right Hand 200196 1 14 BUMPER, Front 200033 1 15 BEARING, Wheel Hub 06112 4 ____________________________________________________________________________________________________________________________________________ 16 DUST CAP, 3/4'' I.D. 02602 2 DUST CAP, 7/8'' I.D. 02603 2 CLEVIS, Threaded, Tie Rod 17 200863 1 ______________________________________________________________________________________________________________________________________________ PEDAL, Brake 18 200104 1 FOOT REST, Right Hand 19 200139 1 SWITCH, Interlock 20 07560 1 _____________________________________________________________________________________________________________________________________________ GUARD, Main Belt 21 09217 1 STEERING WHEEL 22 200200 1 COLLAR, Steering Shaft 23 200199 1 ________________________________________________________________________________________________________________________________________________ BRACKET, Throttle Control 24 200203 1 SWITCH, Key, Briggs & Stratton and Kawasaki 25 07034 1 THROTTLE CONTROL, (Includes conduit and wiring) 26 07032 1 _____________________________________________________________________________________________________________________________________________ SEAT 27 07036 1 BALL JOINT 28 200867 2 68OM-06/03 29 RUNNING GEAR & MISC. PARTS -- MODEL 68 DL Item Part No. Description Qty. 1 07065 KEY SWITCH 1 2 07064 AMPMETER 1 3 07063 HOURMETER 1 ____________________________________________________________________________________________________ 4 09098 DASHBOARD 1 5 09218 GUARD, Main Belt 1 6 200200 STEERING WHEEL 1 ____________________________________________________________________________________________________ 7 09101 COVER, Battery 1 8 201754 HOLDOWN, Battery 1 9 201582 BATTERY BOX 1 ____________________________________________________________________________________________________ 10 202447 ROD, Side Post Battery 2 11 201925 FOOT REST, Left 1 12 07038 TIRE, Deluxe Wide 2 ____________________________________________________________________________________________________ 13 07560 INTERLOCK 1 30 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX SEAT MOUNTING & BELT GUARDS Item Part No. Description Qty. 1 07101 ADJUSTER, Seat 1 2 200814 HINGE, Seat 2 3 205470 BRACKET, Seat Switch 1 _________________________________________________________________________________________________________________________________________ 4 02614 WASHER 2 5 04512 SPRING, Seat 2 6 202249 TUBE, Pivot 1 _________________________________________________________________________________________________________________________________________ 7 202251 HANDLE, Lifter 1 8 07039 GRIP, Handle 1 9 09218 GUARD, Main Belt (DL only) 1 _________________________________________________________________________________________________________________________________________ 09217 GUARD, Main Belt (SR only) 1 10 09213 SHIELD, Latch Hook, L.H. 1 11 09216 GUARD, Pulley (DL only) 1 _________________________________________________________________________________________________________________________________________ 12 09100 GUARD, Engine Clutch (DL only) 1 09002 GUARD, Engine Clutch (SR only) 1 13 205485 GUARD, Pulley 1 _________________________________________________________________________________________________________________________________________ 14 09220 SHIELD, Latch Hook, R.H. 1 15 202343 ASSEMBLY, Seat Bracket 1 16 07325 SWITCH 1 _________________________________________________________________________________________________________________________________________ 17 205459 PIVOT, Switch 1 18 202798 SPRING, Return 1 19 205460 ARM, Spring 1 _________________________________________________________________________________________________________________________________________ 20 200123 BUSHING 1 68OM-06/03 31 DRIVE MECHANISM -- UPPER PORTION 32 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX DRIVE MECHANISM -- UPPER PORTION Item Part No. Description Qty. 1 200530 1 GUIDE, Belt, High Speed Pulley 2 03607 1 PULLEY, Countershaft Idler 3 03608 2 IDLER, Engine Clutch ______________________________________________________________________________ 4 200179 1 ARM, Engine Clutch 5 200176 1 ARM, Countershaft Idler 6 200172 1 ROD, Countershaft Idler Control ______________________________________________________________________________ 7 200173 1 BRACKET, Idler Pivot 8 202445 1 STUD, Belt Guide 9 201541 1 BELT GUIDE, Lower ______________________________________________________________________________ 10 201538 1 BELT GUIDE, Upper 11 200165 1 ROD, Main Clutch, Upper 12 08021 1 ROD, Main Clutch, Lower ______________________________________________________________________________ 13 202437 1 SPRING 14 200162 1 COLLAR, Lock 15 03609 1 PULLEY, Motor ______________________________________________________________________________ 16 03903 1 BELT, Engine, Kawasaki, 6844 Gates Rated 17 200208 1 KEY, Square, Engine 18 200184 1 ARM, Main Belt Idler ______________________________________________________________________________ 19 04501 1 SPRING, Main Belt Idler Arm 20 200163 1 LEVER, Engine Clutch 21 07024 1 KNOB, Clutch Lever ______________________________________________________________________________ 22 09002 1 GUARD, Engine Clutch 23 03606 1 PULLEY, Main Countershaft 24 200157 1 COUNTERSHAFT, Main ______________________________________________________________________________ 25 03902 1 BELT, Drive, B66 26 04013 1 KEY, Woodruff, #11 27 02602 2 DUST CAP, 3/4" I.D. ______________________________________________________________________________ 28 06006 2 BUSHING, Main Countershaft Housing 29 200154 1 HOUSING, Main Countershaft 30 200158 1 STEP PULLEY, Main Countershaft ______________________________________________________________________________ 31 03901 1 BELT, Countershaft, A29 ______________________________________________________________________________ 68OM-06/03 33 DRIVE MECHANISM -- MIDDLE PORTION Item Part No. Description Qty. 1 SHIELD, Engine 1 203622 2 GRIP, Lever, '96 and up 1 07023 3 LEVER, Lower Countershaft Control 1 205486 ________________________________________________________________________________________________________________________________________ 4 SWITCH, Control 2 07325 5 U-NUT, 1/4-20 2 02288 6 BRACKET, Muffler Guard, L.H. 1 205471 _______________________________________________________________________________________________________________________________________ 7 BRACKET, Muffler Guard, R.H. 1 205472 8 GUARD, Muffler 1 205477 9 ROD, Countershaft Idler Control (shown for reference only) 1 200172 ________________________________________________________________________________________________________________________________________ 10 SPRING 2 202437 11 COLLAR, Lock 2 200182 12 ROD 1 200170 ______________________________________________________________________________________________________________________________________________ 13 SPRING, Lift Latch 2 04552 14 BUSHING 4 200676 15 HOOK, Wing Mower 2 205451 ____________________________________________________________________________________________________________________________________________ 16 ROLL PIN, 0.25 x 1.12 2 04056 34 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX DRIVE MECHANISM -- LOWER PORTION Item Part No. Description Qty. 1 03615 2 PULLEY, Lower Countershaft 2 06105 2 BEARING, Lower Countershaft 3 205482 1 CARRIER, Lower Countershaft (Model 68SR only) ________________________________________________________________________________________________________________________________________ 205481 1 CARRIER, Lower Countershaft (Model 68DL only) 4 04056 2 ROLL PIN, 0.25 x 1.12 5 02614 1 WASHER _______________________________________________________________________________________________________________________________________ 6 205458 1 PIVOT, Switch, R.H. 7 200123 1 BUSHING 8 02614 1 WASHER ________________________________________________________________________________________________________________________________________ 9 202798 2 SPRING 10 200137 1 PULL ANGLE, Wing Mower, Rear 11 205461 1 PIVOT, Switch, L.H. ______________________________________________________________________________________________________________________________________________ 12 02602 2 DUST CAP, 3/4" I.D. 13 205454 1 PULL ARM, Wing Mower, Left and Right Hand 14 07226 1 GRIP, Wing Mower Arm ____________________________________________________________________________________________________________________________________________ 15 200135 1 COUNTERSHAFT, Lower 16 03901 1 BELT, Countershaft, A29 17 03603 1 PULLEY, Lower Countershaft Drive ______________________________________________________________________________________________________________________________________________ 18 200136 1 BELT GUIDE, Pulley 19 205462 2 BRACKET, Switch Mounting 20 07325 2 SWITCH, Control _____________________________________________________________________________________________________________________________________________ 21 04505 1 SPRING, Wing Mower Pull Rod 22 200151 1 PULL ROD, Wing Mower 23 201880 1 PIN, Wing Mower Arm 68OM-06/03 35 DRIVE MECHANISM -- MODEL 68 DL 36 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX DRIVE MECHANISM -- MODEL 68 DL Item Part No. Description Qty. 1 09100 GUARD, Engine Clutch 1 2 201881 RETAINER, Mowing Belt 1 3 201884 RETAINER, Transport Belt 1 _________________________________________________________________________________________________________________________________________ 4 201890 MOUNT, Belt Guides 1 5 201872 STEP PULLEY, Main Countershaft 1 6 03603 PULLEY, Transport, Main Countershaft 1 _________________________________________________________________________________________________________________________________________ 7 02507 Washer, 10 GA. 2 8 03502 O-RING, 7/8" Dia. 2 9 06101 NEEDLE BEARING 2 _________________________________________________________________________________________________________________________________________ 10 03902 BELT, Drive, B66 1 11 03655 PULLEY, Main Countershaft 1 12 04013 KEY, Woodruff, #11 3 _________________________________________________________________________________________________________________________________________ 13 201871 COUNTERSHAFT, Main 1 14 201740 HOUSING, Main Countershaft 1 15 200208 KEY, Square, Engine 2 _________________________________________________________________________________________________________________________________________ 16 03926 BELT, Engine, Transport, 6841 Gates Power Rated 1 17 03602 PULLEY, Engine, Transport Belt 1 18 03903 BELT, Engine, Mowing, 6844 Gates Power Rated 1 _________________________________________________________________________________________________________________________________________ 19 03609 PULLEY, Engine, Mower Belt 1 20 202780 BELT GUIDE WELDMENT, Engine 1 21 202446 STUD, Belt Guide 1 _________________________________________________________________________________________________________________________________________ 22 201946 BRACKET, Idler Pivot with Bushings 1 23 200530 GUIDE, Belt 1 24 202441 SPRING, Transport Pedal Return 1 _________________________________________________________________________________________________________________________________________ 25 03608 PULLEY, Idler 1 26 201721 FOOT LEVER 1 27 201728 ARM, Idler, Lower Countershaft 1 _________________________________________________________________________________________________________________________________________ 28 201730 ARM., Idler, Mowing Belt 1 29 03607 PULLEY, Clutch Lever 1 30 201718 PULLEY LEVER, Transport 1 _________________________________________________________________________________________________________________________________________ 31 201889 GUIDE, Belt 1 32 201919 ROD, Transport Clutch 1 33 202440 SPRING, Transport 1 _________________________________________________________________________________________________________________________________________ 34 201966 PEDAL, Transport 1 35 205481 CARRIER, Lower Countershaft 1 _________________________________________________________________________________________________________________________________________ 68OM-06/03 37 38 68OM-06/03 REAR AXLE & DIFFERENTIAL 68OM-06/03 REAR AXLE & DIFFERENTIAL Qty. Item Part No. Description Qty. Item Part No. Description 1 1 04502 SPRING, Shifter Lever 2 1 200675 BUSHING, Shifter Lever Bushing _______________________________________________________________________1__ ___3_______205434 ______SHIFTER________________________________________ _ _______ _________ LEVER _ 4 1 07007 GRIP, Shifter 5 1 04021 CLEVIS, Brake 6_______04022_________________________3/8"_x________________________1__ PIN,_______Pedal, ____ _ __________________________ Brake ______ ____ _ 1-1/4" _________________ ___________ ____ ______ _ 7 1 200061 STOP DISC, Shifter 8 1 200103 ROD UNIT, Brake 9_______06102______________________________________________________2__ _________________ _______NEEDLE_BEARING,_Rear ________________________ ____ ______ ________ __________ _____Countershaft _ 10 1 08010 U-BOLT, Shifter 11 1 201432 BRACKET,Parking Brake Pull _______________________________________Parking_Brake___________________1__ __12_______08037 _______ROD,_Formed, ___________________________________ __ ______ _____ ________ _______ _____ _ 13 1 205450 LEVER, Parking Brake 14 1 200676 BUSHING _________________________________________________________Shaft____________ __15_______06101 _______NEEDLE_BEARING,_Intermediate _____ _________2__ __ ______ ________ __________ ____________ _____ _ 16 1 07003 GASKET, Back Plate Cover 17 1 200234 COVER, Differential Case, Inside 18_______200051__________________________Differential ___________________ SLIDING_WASHER, ___________________________1__ Case __________________ ______________ __________ __________ ____ _______ _ 19 1 04008 PIN, Spring (Roll PIn), 5/16" x 1-1/8" 20 1 200054 GEAR, Shifting, 11 Tooth 21_______200050_____________________________________________________1__ __________________ ______GEAR, __________________________________________ ____ _______ _______ Reverse _ 22 1 06003 BUSHING, Reverse Gear 23 1 200049 SHAFT, Reverse Gear _________________________________Differential____________________________4__ __24_______200069 ______PINION, _________________________________________ __ _______ ________ __________ _ 25 1 07009 GASKET SET, Differential 26 1 200065 COVER, Differential Case, Outside _______________________________________________________________________1__ __27_______200079 ______HUB, ______Wheel, _______________________________ __ _______ _____ Rear _______Right _ 28 2 06005 BUSHING, Rear Wheel Hub 29 1 200680 DUST WASHER, 1-1/8" 30_______03504______________________________________________________1__ O-RING,_1-1/8" __________________________________ _________________ _______________ ______ ____ ______ _ 31 1 200084 SPLIT DISC SEAL, Wheel Hub, Right Rear 32 1 03503 SEAL, Oil 34_______200075_____________________________________________________1__ __________________ ______AXLE_ASSEMBLY,_______________________________ ____ _______ _____ ____________ Rear _ 35 2 06004 BUSHING, Bull Gear 1 RETAINING RING, Pinion gear 09012 36 1 BULL GEAR ASSEMBLY, Complete 200066 37 38 ________________________SHAFT_UNIT,_____________________________________ __________200070_____________ ________________________________________1__ _______ _______ _____ Intermediate _ 1 WASHER, 1-1/8" I.D. 02607 39 1 SLEEVE, Axle Bearing 200088 40 Axle 06103 _________________ _____________________________________1__ 41____________________BEARING,_Right__________________________________ ____ ____________ ____ __________ _____ _ 1 SPACER, Right Axle 02510 42 1 SEAL, Rear Axle 03510 43 Axle, ______ 02510 _________________ ________ __________1-1/8" _______________ 44____________________WASHER,_Bearing,_Left_________________________1__ ____ ____________ ____ __________ ________ ___ _ 1 BEARING, Left Axle 06104 45 AR SHIM, Left Axle, 10 Ga. 200687 46 AR ________________________SHIM,_Left_Axle,_14_Ga.____________________________ __________200821____________ _________ __________________________________ _______ ______ ___ _____ __ ___ AR SPACER, Left Axle, 1/32" 200685 47 AR SHIM, Axle Spacer, 22 Ga. 200688 48 ________________________COLLAR,_Rear_________________________________1__ __________200095_______________ _____ ___________________________________ _______ _________ _____ Axle _ 1 CAP, Left Axle 200096 49 1 WHEEL HUB, Left Rear 200090 50 PIN, ______ Rear _____1/4" _ 1-3/4" 04016 ____________Collar, ______Axle, _________________________1__ 51______________________________________________x ______________________ ____ ____________ ____ _ 4 KEY, Woodruff, #11 04013 52 1 LOCK RING, 7/8" 04020 53 BAND ASSEMBLY 200099_____________ ________________________________________1__ 54____________________BRAKE___________________________________________ ____ _____________ ____ _______ _ 1 O-RING, 7/8" 03502 55 1 DUST CAP, 7/8" 56 02603 57 ________________________PULLEY,_________________________________________ __________03618 ________________ ______________________________________1__ ______ _________Step _ 1 BRAKE DRUM 200097 58 1 KEY, Woodruff, #9 04012 59 60 ________________________SHAFT,_Shifting________________________________1__ __________200055_______________________Countershaft_____________________ _______ _______ _______ ____________ _ 1 LOCK RING, 3/4" 04011 61 1 LEVER, Brake Band 62 200102 CAP, ____ 02602 _____________ ______3/4" _______________________________1__ 63____________________DUST____________________________________________ ____ ____________ ____ ______ _ 1 O-RING, 3/4" 03511 64 1 COUNTERSHAFT CARRIER UNIT, Shifting 200056 65 1 CARRIER, ______ 200063_________________Shifter_________________________________ 66______________________________________________________________________ ____ _____________ ____ 1 BUSHING, Shifter Lever 200676 67 1 SPRING 68 04547 ® NATIONAL 68 SR & DL TRIPLEX 39 WING CUTTING UNITS NOTE -- Skids and Reel End Shields are not shown. See parts page "Skids, Reel End Shields & Guards" 40 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX WING CUTTING UNITS Item Part No. Description Qty. 1 201513 BRACKET, Shield 4 2 200235 UPRIGHT, Shield 4 3 204497 ROLLER, 21" 2 __________________________________________________________________________________________________________________________________ 4 203248 ROLLER BRACKET, L.H. 2 5 204495 ADJUSTER, Roller 4 6 201775 FRAME, Bed Knife, Bolt-on 2 __________________________________________________________________________________________________________________________________ 7 02109 SCREW, Flat Head 14 201802 NUT, Bed Knife Screw 14 8 201504 BED KNIFE, 21", 2 __________________________________________________________________________________________________________________________________ 9 04549 SPRING, Reel Adjusting 2 10 200236 REEL TAKE-UP ASSEMBLY 4 11 302550 REEL CARRIER ASSEMBLY, Left Hand 2 __________________________________________________________________________________________________________________________________ 12 06120 BEARING, Reel, (Includes Race) 4 13 200296 REEL ASSEMBLY, 6 Blade 2 14 201781 FRAME, Wing Mower 2 __________________________________________________________________________________________________________________________________ 15 200256 ADJUSTING SCREW & NUT, Bearing 2 16 201437 TAKE-UP WASHER, Reel Bearing 2 17 201383 CAP SCREW (Special), Pulley Scraper 2 __________________________________________________________________________________________________________________________________ 18 200287 PULLEY SCRAPER 2 19 302549 REEL CARRIER ASSEMBLY, Right Hand 2 20 03931 BELT, Wing Cutting Unit (Gates A34) 2 __________________________________________________________________________________________________________________________________ 21 03601 PULLEY 2 22 201520 SHIELD, Right Hand 1 201521 SHIELD, Left Hand 1 __________________________________________________________________________________________________________________________________ 23 202261 SHIELD, Belt, L.H. 1 202260 SHIELD, Belt, R.H. 1 24 203172 ROLLER BRACKET, R.H. 2 68OM-06/03 41 42 NOTE -- Skids and Reel End Shields are not shown. See parts page "Skids, Reel End Shields & Guards" REAR CUTTING UNIT 68OM-06/03 68OM-06/03 REAR CUTTING UNIT Qty. Item Part No. Description Qty. Item Part No. Description 1 09170 GUARD, Clutch, Rear Mower, '96 and up 1 2 201513 BRACKET, Shield 2 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ UPRIGHT,_Shield_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _2_ _ _ _ 3_ _ _ _ _ _ _200235_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ______ __________ _____ _ 4 204498 ROLLER 1 5 204495 ADJUSTER, Roller Bracket 2 6________________________________________________________________________________________________________________________________ 203248 ROLLER BRACKET, L.H. 1 ____ ___ 7 200109 PULL YOKE, Rear Mower 1 8 200236 REEL TAKE-UP ASSEMBLY 2 9_________________________________________________________________________________________________________________________________ 200256 ADJUSTING SCREW & NUT, Bearing 2 ____ ___ 10 200237 PIVOT TUBE, Rear Mower 1 11 200263 COUNTERSHAFT 1 12_______________________________________________________________________________________________________________________________________ 06006 BUSHING, Countershaft 2 ____ ___ 13 201735 REEL CARRIER ASSEMBLY, Right Hand 1 14 201437 TAKE-UP, Reel Bearing 2 15______________200261__________________________________________________________________________________________________________ HOUSING, Countershaft, Rear Mower 1 ____ ___ _______ ______ 16 03116 SPROCKET, Countershaft 1 17 04008 PIN, Sprocket Hub, 5/16" x 1-1/8" 1 18_______________________________________SPROCKET,________________________________________________________________________ 03115 Reel 1 ____ ___ ____________ ____________ 19 200241 REEL ASSEMBLY, Rear Mower, 6 Blade 1 20 06120 BEARING, Reel 2 06121_____________________________________________________________________________________________________________ CUP, Reel Bearing 2 ________________ ________________ 21 02109 SCREW, Bed Knife 9 (sold as a set with nut below) 201802 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _NUT,_Bed _ _ _ _ _ _Screw_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Knife _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _____ _________ ______ 22 201773 BED KNIFE FRAME ASSEMBLY, Rear Mower 1 23 201407 BED KNIFE, 30" 1 24_______________________________________SPRING,_______________________________________________________________________________ 04549 Adjusting 2 ____ ___ _________ ________ 25 302550 REEL CARRIER ASSEMBLY, Left Hand 1 26 200223 FRAME, Rear Mower 1 CHAIN, _ _ _ _ _ _ _ _ _ _ _ Mower _ _ _ _ _ _ _ _ _ _ _07481 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Rear _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _1_ _ _ _27_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Roller, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ ______ _ 28 203452 LIFTER TEE, Rear Mower 1 29 200214 BRACKET, Guard 1 30________________________________________________________________________________________________________________________________________ 202301 BRACE, Seat 1 ____ ___ 31 200271 SHIFTER YOKE, Rear Mower 1 32 03905 BELT, Rear Mower, A42 1 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _SHIFTER_LUG _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _33_ _ _ _ _ _ _ 200388 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _1 _ _ __ _______ _________ ____ _ 34 05022 PIN, Clutch 2 35 200273 BRACKET, Clutch Lever 1 36__________________________________________________________________________________________________________________________________________ 202438 SPRING 1 ____ ___ 37 200276 LEVER, Clutch Shifter 1 38 07022 GRIP, Shifter Clutch 1 39__________________________________________________________________________________________________________________________________________ 02602 DUST CAP, 3/4" I.D. 1 ____ ___ 40 04506 SPRING, Clutch 1 41 200266 CLUTCH, Sliding Jaw, Rear Mower 1 42________________________________________________________________________________________________________________________________________ 200264 PULLEY ASSEMBLY, Countershaft 1 ____ ___ 43 06007 BUSHING, Countershaft Pulley 1 44 200123 BUSHING, Pull Yoke 2 45_______________________________________________________________________________________________________________________________________ 203172 ROLLER BRACKET, R.H. 1 ____ ___ 46 04504 SPRING, Idler 1 47 200115 IDLER ARM UNIT, Rear Mower 1 48 _____________03607 ________________________________________________________________________________________________________ PULLEY, Idler 1 ____ ___ ______ _____ 49 201519 SHIELD, Rear Mower 1 ____________________________________________________________________ ___________________________________________________________________ ® NATIONAL 68 SR & DL TRIPLEX 43 SKIDS, REEL END SHIELDS & GUARDS Item Part No. Description Qty. 1 203728 SKID BAR, L.H. 1 2 202959 SHIELD, Wing Mower 3 3 201585 SKID, Mower 2 _________________________________________________________________________________________________________________________________________________ 4 203727 SKID BAR, R.H. 2 5 202410 GUARD, Inside, Rear Mower 1 6 202281 CHAIN GUARD, Rear Mower 1 44 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX ROLLERS & STANDARD SCRAPERS ROLLER ASSEMBLY (21") P/N 204497 (includes items 1-4) ROLLER ASSEMBLY (30") P/N 204499 (Includes items 1-4) ROLLER SCRAPER KIT P/N 860032 (includes items 5-8) Item Part No. Description Qty. 1 205330 CAP, Bearing 2 2 06142 BEARING, Roller 2 3 204500 SHAFT, Roller (21") 1 _______________________________________________________________________________________________________ 204499 SHAFT, Roller (30") 1 4 204502 WELDMENT, Roller (21") 1 204501 WELDMENT, Roller (30") 1 _______________________________________________________________________________________________________ 5 02228 NUT, Jam, 5/16-24 12 6 205375 BRACKET, Roller Scraper, L.H. 3 7 09092 CABLE, Roller Scraper (21") 2 _______________________________________________________________________________________________________ 09090 CABLE, Roller Scraper (30") 1 8 205376 BRACKET, Roller Scraper, R.H. 3 9 204495 ADJUSTER, Roller (not included) _______________________________________________________________________________________________________ 68OM-06/03 45 DIAL-A-HEIGHTTM ROLLER SCRAPER KIT, P/N 860033 (includes items 1-4) Item Part No. Description Qty. per Kit 1 205384 BRACKET, Cable Mounting, L.H. 3 2 04107 U-BOLT, 1/4-20 x 1.25 ID x 2.25 6 3 09092 CABLE, Roller Scraper, Wing Cutting Unit 2 _______________________________________________________________________________________________________ 09090 CABLE, Roller Scraper, Rear Cutting Unit 1 4 205385 BRACKET, Cable Mounting, R.H. 3 46 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX DIAL-A-HEIGHTTM ROLLER ADJUSTER KIT, P/N 860034 Item Part No. Description Qty. per Kit 1 205341 DECAL, Instruction 6 2 205348 ASSEMBLY, Roller Adjuster, L.H. 3 3 205380 WELDMENT, Roller Bracket, L.H. 3 _______________________________________________________________________________________________________ 4 204991 PLATE, Scale 6 5 205346 DECAL, Wing Cutting Unit 4 205339 DECAL, Rear Cutting Unit 2 _______________________________________________________________________________________________________ 205381 WELDMENT, Roller Bracket, R.H. 3 6 7 205349 ASSEMBLY, Roller Adjuster, L.H. 3 _______________________________________________________________________________________________________ 68OM-06/03 47 DIAL-A-HEIGHTTM ADJUSTER, P/N 205348 & 205349 Item Part No. Description Qty. 1 204996 CAP, Vinyl 1 2 205334 WELDMENT, Threaded Rod 1 3 204995 SPRING 1 _______________________________________________________________________________________________________ 4 205345 WELDMENT, Socket 1 5 205399 WELDMENT, Height of Cut Adjuster, R.H. 1 205400 WELDMENT, Height of Cut Adjuster, L.H. 1 _______________________________________________________________________________________________________ 6 204997 END, Swivel 1 _______________________________________________________________________________________________________ 48 68OM-06/03 ® NATIONAL 68 SR & DL TRIPLEX SAFETY SWITCHES Never attempt to remove or circumvent the safety switches. Dangerous operating conditions may result. DANGER If you encounter difficulties starting the mower's engine, or keeping it running, check the chart below to make sure you are not causing the engine to kill or become unable to start. With the engine off, and the ignition key removed, check the switches regularly to make sure they are unobstructed by grass clippings or other material. Make sure the electrical terminals remain clean and dry and the pivot mechanisms for each switch operate freely. Never spray the mower safety switches directly with highpressure water. Your National 68 mower is equipped with safety switches to monitor the operating conditions of certain machine functions and stop the mower whenever unsafe conditions are found. It is necessary for both the main engine clutch and the wing cutting unit clutch to be in their neutral position to start the engine. The 68 DL also requires the operator be in the seat. The 68 SR does not require the operator to be in the seat to facilitate use of the hand recoil starter. Main Engine Clutch ENGAGED Wing Cutting Unit Clutch ENGAGED Seat Sw itch (Operator Presence) OFF Wing Cutting Unit Lift Arms DOWN UP 68 D L Engine R esp o n se KILL KILL RUN KILL KILL KILL RUN RUN RUN KILL RUN KILL RUN RUN START & RUN START & RUN 68 S L Engine R esp o n se KILL KILL RUN KILL KILL KILL RUN RUN KILL KILL RUN KILL START & RUN START & RUN START & RUN START & RUN ON DOWN UP NEUTRAL OFF DOWN UP ON DOWN UP NEUTRAL ENGAGED OFF DOWN UP ON DOWN UP NEUTRAL OFF DOWN UP ON DOWN UP 68OM-06/03 49 ELECTRICAL DIAGRAMS MODEL 68 SR ELECTRICAL -- SAFETY SWITCH AND CIRCUIT DIAGRAM MODEL 68 DL ELECTRICAL -- SAFETY SWITCH AND CIRCUIT DIAGRAM 50 68OM-06/03