National Mower 68 SR, 68 DL owner manual Preparation, Operation, Main Clutch Lever

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PREPARATION

Handle cutting units carefully with DANGER protective gloves. Reels and bed

knives are very sharp. Reels rotate freely and rotating one reel can cause other reels to rotate.

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.

CAUTION

Moving machinery can be dangerous

LUBRICATION - Add lubricant to pivots and other

if not operated properly. Follow all safe operating suggestions listed in the Safety Information section of this manual.

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.

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.

OPERATION

The following is a description of the machine controls and their function.

A. Main Clutch Lever

WARNING Engage slowly before full engagement. Always disengage

the drive when stopping or leaving the machine.

Engages power for travel and mowing. Down position is disengaged and up position is engaged.

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.

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.

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68OM-06/03

Image 14 Contents
Model 68 SR Triplex Mower Model 68 DL Triplex Mower National Mower Company ONE Year Limited WarrantyThere is no Other Warranty Expressed or Implied Table of Contents IntroductionTraining Preparation Safety InformationNational Mower Safe Operating Practices OperationHill Operation MaintenanceISO Safe Operating Practices TrainingMaintenance and Storage California Safe Operating PracticesSafety and Control Decals Main Engine Clutch LeverSafety and Control Decals Height Adjuster Safety and Control Decals Receipt of Shipment Uncrating InstructionsRear Cutting Unit AssemblySeat National 68 SR & DL Triplex Wing Cutting Units Reel to BED Knife AdjustmentRear Cutting Unit Belt EngineMain Clutch Lever PreparationOperation Rear Cutting Unit Clutch Seat Position Adjuster LeverTransport Clutch Model 68 DL only Wing Cutting Unit Latch Rear Cutting Unit Lift ArmService Brake Safety SwitchesIgnition Switch Model 68 DL shown Parking Brake LeverStandard Adjusters Height of CUT AdjustmentOther Adjustments DIAL-A-HEIGHT Adjuster OptionalMaintenance LubricationLubrication Points Maintenance Lubrication Points Height of CUT Adjustment Reel AdjustmentsReel END Play Adjustment Brake AdjustmentRear Cutting Unit Drive Belt Tension Adjusting Drive Belt TensionMain Drive Belt Tension Main Countershaft to Rear Drive BED Knife Replacement Rear Cutting Unit Chain TensionRecommended Steps Back Lapping ProcedureIntroduction Grinding ReelsMaintenance Record TROUBLE-SHOOTING Situation Things To CheckParts List Frame & Running GearRear Tire & Wheel Assembly Description QtyRunning Gear & MISC. Parts -- Model 68 DL Seat Mounting & Belt Guards WasherDrive Mechanism -- Upper Portion Spring Drive Mechanism -- Middle Portion Drive Mechanism -- Lower Portion Drive Mechanism -- Model 68 DL Needle Bearing Rear Axle & Differential Part No. Description Qty Shifter LeverWing Cutting Units Roller Rear Cutting Unit Countershaft SKIDS, Reel END Shields & Guards Rollers & Standard Scrapers DIAL-A-HEIGHT Roller Scraper KIT, P/N 860033 includes items Description Qty. per KitDIAL-A-HEIGHT Roller Adjuster KIT, P/N DIAL-A-HEIGHT ADJUSTER, P/N 205348 Safety Switches ResponseElectrical Diagrams Electrical PARTS-- Models 68 SR & 68 DL Description Qty Model 68 SR Model 68 DLEngine Briggs & Stratton 138400 Series SpecificationsMower Dimensions & Weight Sound & Vibration LevelsFunction National Number Belt Mfr Number Belt CROSS-REFERENCE ChartParts Ordering Information Conformiteitsverklaring Déclaration DE ConformitéDeclaracion DE Conformidad Raymond Avenue Box Saint Paul, Minnesota Tel Fax