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National Mower 68 DL TRIPLEX Owner's Manual

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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

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Summary of Contents for National Mower 68 DL TRIPLEX

  • Page 1 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...

  • Page 2: 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.

  • Page 3: Table Of Contents

    Parts Ordering Information ..............53 Declaration of Conformity ............... 55 INTRODUCTION Before operating mower, carefully and completely read This manual has been prepared by National Mower this manual. The contents provide you with an Company as an aid to users in the assembly, safe...

  • Page 4: Safety Information

    Watch for dangerous traffic when crossing or near road- OBEY THE MESSAGE! ways. Never direct the discharge of material from operating reels NATIONAL MOWER SAFE OPERATING toward bystanders nor allow anyone near the mower. PRACTICES The mower and reels should be stopped and inspected for damage after striking a foreign object.
  • Page 5 ® NATIONAL 68 SR & DL TRIPLEX Do not mow in reverse, unless absolutely necessary. Never mow while people, especially children, or pets are Always look down and behind before and during reverse nearby. motion. Keep in mind that the operator or user is responsible for Shut off and raise the cutting units before operating the accidents or hazards occurring to other people or their mower at transport speed.
  • Page 6 • after striking a foreign object. Inspect the lawn mower mable vegetation. Arresters must be obtained from your for damage and make repairs before restarting and op- engine dealer and are not available from National Mower eration the lawn mower; Company.

  • Page 7: Safety And Control Decals

    ® 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.
  • Page 8 SAFETY AND CONTROL DECALS 07587 – IGNITION KEY (Model 68 SR) 07599 – WARNING (located on top surface of main belt DECAL guard) (located on instrument cluster [68 DL] or main To start the engine, place the main belt guard [68 SR]) clutch and all cutting unit clutches in neutral.
  • Page 9 ® 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.
  • Page 10 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.

  • Page 11: Receipt Of Shipment

    ® NATIONAL 68 SR & DL TRIPLEX RECEIPT OF SHIPMENT Carefully inspect your machine and crate for damage that Note: Claims for shipping damages must be noted by the could have occurred during shipment. If damages or consignee at the point of destination and filed with the shortages are noted, have the transportation company’s transportation company that delivers the shipment.

  • Page 12: Assembly

    ASSEMBLY Improper assembly or adjustments WARNING can cause serious injury. SEAT REAR CUTTING UNIT 1. Mount the Rear Cutting Unit Lifter and Seat Assembly 1. Pivot the Seat Brace (A) from the axle so that the top (A) to the mower frame using (2) 1/2" bolts, nuts, and end aligns with the tab at the back of the seat hinge washers (B).
  • Page 13 ® 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.

  • Page 14: Preparation

    PREPARATION FUEL - Check fuel level. Add fuel as required. Refer to Handle cutting units carefully with DANGER protective gloves. Reels and bed the engine manual for type of fuel and other safety knives are very sharp. Reels rotate freely and rotating requirements.
  • Page 15 ® NATIONAL 68 SR & DL TRIPLEX OPERATION D. Transport Clutch (Model 68 DL only) G. Rear Cutting Unit Clutch Engages drive to the Rear NEVER USE THE TRANSPORT Cutting Unit. WARNING CLUTCH WHILE THE CUTTING Pull lever forward and UNITS TURNING WHEN...
  • Page 16 OPERATION K. Ignition Switch (Model 68 DL shown) ALWAYS SHUT OFF THE ENGINE M. Parking Brake Lever CAUTION AND REMOVE THE KEY BEFORE Provides a lock for the brake. Push brake lever forward, LEAVING THE MOWER SEAT. over center, to lock. Pulling brake lever back, toward the rear of the machine will disengage the brake.
  • Page 17 ® NATIONAL 68 SR & DL TRIPLEX HEIGHT OF CUT ADJUSTMENT 2. DIAL-A-HEIGHT ADJUSTERS (OPTIONAL) To set the height of cut, lift the vinyl cap and socket (A) off To assure safety, disengage the DANGER the adjuster tube. To raise the height of cut, turn the engine clutch lever, remove the socket clockwise (viewed from above).

  • Page 18: Maintenance

    MAINTENANCE LUBRICATION leakage is evident, it is recommended that the grease be Lubricate the machine at the recommended locations and checked once each year. Check grease level by loosening intervals using the proper lubricants to ensure maximum the bolts in the differential case flanges and spreading service and long life of your machine.
  • Page 19 ® NATIONAL 68 SR & DL TRIPLEX LUBRICATION POINTS 9. Upper countershaft 1. Front wheel bearing 2. Steering Kingpin 10. Lower countershaft 3. Front axle pivot 4. Steering column (2 places) 5. Brake pedal pivot 6. Idler pivot bracket (68 DL only) 7.
  • Page 20 MAINTENANCE LUBRICATION POINTS 18. Rear mower pivot tube 12. Rear axle (2 places) 13. Differential input tube 14. Brake drum tube 15. Main axle tube 19. Rear mower countershaft (2 places) 20. Rear mower clutch 16. Seat Hinge 21. Wing mower lift arm (2 places) 17.
  • Page 21 ® 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.
  • Page 22 MAINTENANCE To assure safety, disengage the Do not adjust one side more than the other unless the reel DANGER engine clutch lever, remove the is obviously out of alignment. Do not get the reel so tight ignition key, and disconnect the engine spark plug that it is hard to turn by hand.
  • Page 23 ® 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.
  • Page 24 MAINTENANCE BED KNIFE REPLACEMENT REAR CUTTING UNIT CHAIN TENSION A chain drive is located on the left side of the rear cutting Reels and bed knife are sharp. Wear DANGER unit. It maybe helpful to remove the Chain Shield (A) prior gloves to avoid cutting fingers on to adjusting the chain tension.
  • Page 25 Remove the lower drive belts and attach a back from roundness, dents and nicks. Spin grind to remove all lapping machine (not supplied by National Mower) to burrs. All blades must be on the same diameter. the reels. Follow the instructions furnished by the machine manufacturer.

  • Page 26: Maintenance Record

    MAINTENANCE RECORD 68OM-06/03...

  • Page 27: Troubleshooting

    ® NATIONAL 68 SR & DL TRIPLEX TROUBLE-SHOOTING All adjusting must be made with the engine off. DANGER Do not do any investigation of the working parts of the machine with the motor running. Always turn the engine off! Tractor Unit Situation Things To Check Engine will not start...

  • Page 28: Parts List

    PARTS LIST FRAME & RUNNING GEAR 68OM-06/03...
  • Page 29 ® NATIONAL 68 SR & DL TRIPLEX FRAME & RUNNING GEAR Item Part No. Description Qty. 200002 FRAME 07018 REAR TIRE & WHEEL ASSEMBLY 200085 FOOT REST, Left Hand ________________________________________________________________________________________________________________________________________ 201961 BUSHING, Axle Pivot 06002 BUSHING, Spindle and Steering Post 09014 DRAG LINK _______________________________________________________________________________________________________________________________________...

  • Page 30: Running Gear & Misc. Parts - 68 Dl

    RUNNING GEAR & MISC. PARTS -- MODEL 68 DL Item Part No. Description Qty. 07065 KEY SWITCH 07064 AMPMETER 07063 HOURMETER ____________________________________________________________________________________________________ 09098 DASHBOARD 09218 GUARD, Main Belt 200200 STEERING WHEEL ____________________________________________________________________________________________________ 09101 COVER, Battery 201754 HOLDOWN, Battery 201582 BATTERY BOX ____________________________________________________________________________________________________ 202447 ROD, Side Post Battery...

  • Page 31: Seat Mounting & Belt Guards

    ® NATIONAL 68 SR & DL TRIPLEX SEAT MOUNTING & BELT GUARDS Item Part No. Description Qty. 07101 ADJUSTER, Seat 200814 HINGE, Seat 205470 BRACKET, Seat Switch __________________________________ _______________________________________________________________________________________________________ 02614 WASHER 04512 SPRING, Seat 202249 TUBE, Pivot _________________________________________________________________________________________________________________________________________ 202251 HANDLE, Lifter 07039 GRIP, Handle 09218...

  • Page 32: Drive Mechanism - Upper Portion

    DRIVE MECHANISM -- UPPER PORTION 68OM-06/03...
  • Page 33 ® NATIONAL 68 SR & DL TRIPLEX DRIVE MECHANISM -- UPPER PORTION Qty. Part No. Item Description 200530 GUIDE, Belt, High Speed Pulley 03607 PULLEY, Countershaft Idler _____________________________________________________________________________ 03608 IDLER, Engine Clutch 200179 ARM, Engine Clutch 200176 ARM, Countershaft Idler _____________________________________________________________________________ 200172 ROD, Countershaft Idler Control...

  • Page 34: Drive Mechanism - Middle Portion

    DRIVE MECHANISM -- MIDDLE PORTION Item Part No. Description Qty. SHIELD, Engine 203622 07023 GRIP, Lever, '96 and up LEVER, Lower Countershaft Control 205486 ________________________________________________________________________________________________________________________________________ SWITCH, Control 07325 02288 U-NUT, 1/4-20 205471 BRACKET, Muffler Guard, L.H. _______________________________________________________________________________________________________________________________________ BRACKET, Muffler Guard, R.H. 205472 205477 GUARD, Muffler...

  • Page 35: Drive Mechanism - Lower Portion

    ® NATIONAL 68 SR & DL TRIPLEX DRIVE MECHANISM -- LOWER PORTION Qty. Part No. Item Description 03615 PULLEY, Lower Countershaft 06105 BEARING, Lower Countershaft 205482 CARRIER, Lower Countershaft (Model 68SR only) ________________________________________________________________________________________________________________________________________ 205481 CARRIER, Lower Countershaft (Model 68DL only) 04056 ROLL PIN, 0.25 x 1.12 02614...

  • Page 36: Drive Mechanism - 68 Dl

    DRIVE MECHANISM -- MODEL 68 DL 68OM-06/03...
  • Page 37 ® NATIONAL 68 SR & DL TRIPLEX DRIVE MECHANISM -- MODEL 68 DL Item Part No. Description Qty. 09100 GUARD, Engine Clutch 201881 RETAINER, Mowing Belt 201884 RETAINER, Transport Belt _________________________________________________________________________________________________________________________________________ 201890 MOUNT, Belt Guides 201872 STEP PULLEY, Main Countershaft 03603 PULLEY, Transport, Main Countershaft _________________________________________________________________________________________________________________________________________...

  • Page 38: Rear Axle & Differential

    68OM-06/03...
  • Page 39 ® NATIONAL 68 SR & DL TRIPLEX 68OM-06/03...

  • Page 40: Wing Cutting Units

    WING CUTTING UNITS NOTE — Skids and Reel End Shields are not shown. See parts page "Skids, Reel End Shields & Guards" 68OM-06/03...
  • Page 41 ® NATIONAL 68 SR & DL TRIPLEX WING CUTTING UNITS Item Part No. Description Qty. 201513 BRACKET, Shield 200235 UPRIGHT, Shield 204497 ROLLER, 21" __________________________________________________________________________________________________________________________________ 203248 ROLLER BRACKET, L.H. 204495 ADJUSTER, Roller 201775 FRAME, Bed Knife, Bolt-on __________________________________________________________________________________________________________________________________ 02109 SCREW, Flat Head 201802 NUT, Bed Knife Screw 201504...

  • Page 42: Rear Cutting Unit

    68OM-06/03...
  • Page 43 ® NATIONAL 68 SR & DL TRIPLEX 68OM-06/03...

  • Page 44: Skids, Reel End Shields & Guards

    SKIDS, REEL END SHIELDS & GUARDS Item Part No. Description Qty. 203728 SKID BAR, L.H. 202959 SHIELD, Wing Mower 201585 SKID, Mower _________________________________________________________________________________________________________________________________________________ 203727 SKID BAR, R.H. 202410 GUARD, Inside, Rear Mower 202281 CHAIN GUARD, Rear Mower 68OM-06/03...

  • Page 45: Roller & Standard Scrapers

    ® 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. 205330 CAP, Bearing 06142...

  • Page 46: Roller Scraper Kit, Dial-A-Height

    DIAL-A-HEIGHT™ ROLLER SCRAPER KIT, P/N 860033 (includes items 1-4) Item Part No. Description Qty. per Kit 205384 BRACKET, Cable Mounting, L.H. 04107 U-BOLT, 1/4-20 x 1.25 ID x 2.25 09092 CABLE, Roller Scraper, Wing Cutting Unit _______________________________________________________________________________________________________ 09090 CABLE, Roller Scraper, Rear Cutting Unit 205385 BRACKET, Cable Mounting, R.H.

  • Page 47: Dial-A-Height™ Roller Adjuster Kit

    ® NATIONAL 68 SR & DL TRIPLEX DIAL-A-HEIGHT™ ROLLER ADJUSTER KIT, P/N 860034 Item Part No. Description Qty. per Kit 205341 DECAL, Instruction 205348 ASSEMBLY, Roller Adjuster, L.H. 205380 WELDMENT, Roller Bracket, L.H. _______________________________________________________________________________________________________ 204991 PLATE, Scale 205346 DECAL, Wing Cutting Unit 205339 DECAL, Rear Cutting Unit _______________________________________________________________________________________________________...

  • Page 48: Dial-A-Height™ Adjuster

    DIAL-A-HEIGHT™ ADJUSTER, P/N 205348 & 205349 Item Part No. Description Qty. 204996 CAP, Vinyl 205334 WELDMENT, Threaded Rod 204995 SPRING _______________________________________________________________________________________________________ 205345 WELDMENT, Socket 205399 WELDMENT, Height of Cut Adjuster, R.H. 205400 WELDMENT, Height of Cut Adjuster, L.H. _______________________________________________________________________________________________________ 204997 END, Swivel _______________________________________________________________________________________________________ 68OM-06/03...

  • Page 49: Safety Switches

    ® NATIONAL 68 SR & DL TRIPLEX SAFETY SWITCHES If you encounter difficulties starting the mower’s engine, Never attempt to remove or DANGER or keeping it running, check the chart below to make sure circumvent the safety switches. you are not causing the engine to kill or become unable Dangerous operating conditions may result.

  • Page 50: Electrical Diagrams

    ELECTRICAL DIAGRAMS MODEL 68 SR ELECTRICAL -- SAFETY SWITCH AND CIRCUIT DIAGRAM MODEL 68 DL ELECTRICAL -- SAFETY SWITCH AND CIRCUIT DIAGRAM 68OM-06/03...

  • Page 51: Electrical Parts

    ® NATIONAL 68 SR & DL TRIPLEX *Note: Your mower may be equipped with a digital hour meter. This meter will display a signal after 5 hours, and every 25 hours thereafter, recommending that you change the engine oil and lubricate the mower. 68OM-06/03...

  • Page 52: Specifications

    SPECIFICATIONS MOWER DIMENSIONS & WEIGHT Overall Length ....................79.13" (201 cm) Width, Wing Mowers Folded ................61.8" (157 cm) Width, Wing Mowers Down ................76" (193 cm) Height ......................39.37"(100 cm) Weight (empty) .................... 659 lbs. (299 kg) ENGINE – BRIGGS & STRATTON 138400 SERIES Engine Type ......

  • Page 53: Parts Ordering Information

    ® NATIONAL 68 SR & DL TRIPLEX PARTS ORDERING INFORMATION When ordering replacement parts, always furnish: 1. Your complete name, address, and phone number. 2. Model Number and Serial Number (stamped on the main frame rear axle gusset below seat) 3.
  • Page 54 ® NATIONAL 68 SR & DL TRIPLEX 68OM-06/03...

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