National Mower 68 SR, 68 DL California Safe Operating Practices, Maintenance and Storage

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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, es- pecially when travelling downhill;

machine speeds should be kept low on slopes and dur- ing tight turns;

stay alert for humps and hollows and other hidden haz- ards;

never mow across the face of the slope, unless the ma- chine 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 op- eration the lawn mower;

if lawn mower starts to vibrate abnormally (check imme- diately).

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 oper- ating 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 flam- mable vegetation. Arresters must be obtained from your engine dealer and are not available from National Mower Company.

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Contents Model 68 SR Triplex Mower Model 68 DL Triplex Mower ONE Year Limited Warranty There is no Other Warranty Expressed or ImpliedNational Mower Company 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 InstructionsAssembly SeatRear Cutting Unit National 68 SR & DL Triplex Wing Cutting Units Reel to BED Knife AdjustmentRear Cutting Unit Belt EnginePreparation OperationMain Clutch Lever 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 AdjustmentAdjusting Drive Belt Tension Main Drive Belt Tension Main Countershaft to Rear DriveRear Cutting Unit Drive Belt Tension 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 LevelsBelt CROSS-REFERENCE Chart Parts Ordering InformationFunction National Number Belt Mfr Number Déclaration DE Conformité Declaracion DE ConformidadConformiteitsverklaring Raymond Avenue Box Saint Paul, Minnesota Tel Fax

68 SR, 68 DL specifications

The National Mower 68 DL and 68 SR are two outstanding models in the world of lawn care, engineered for efficiency and ease of use. Both mowers offer a range of features tailored to meet the needs of both residential and commercial users, making them popular choices among landscapers and homeowners alike.

The National Mower 68 DL is designed with durability and performance in mind. It features a robust steel deck that enhances longevity while providing a clean and even cut. Equipped with a powerful engine, the 68 DL delivers high torque and swift acceleration, enabling users to tackle even the toughest grass and rough terrain effortlessly. The mower's advanced cutting system ensures that grass is cut finely and evenly, reducing the need for additional clean-up.

On the other hand, the National Mower 68 SR offers a self-propelled option, allowing users to move with ease across various landscapes. This model incorporates hydrostatic transmission technology, which provides smooth, variable speed control. This feature is particularly beneficial for those who demand precision in their mowing tasks, as it allow for adjustments on the fly, catering to changing terrain conditions.

Both models come with adjustable cutting height options, offering users the flexibility to choose their desired grass length. The easy-to-use lever enables quick and simple adjustments without needing tools, making the mowing process more efficient. Additionally, both the 68 DL and 68 SR are designed with ergonomics in mind, featuring comfortable handles and intuitive controls that minimize operator fatigue.

Safety is another critical consideration in the design of the National Mower 68 series. Both models come equipped with protective shields and safety switches to prevent accidental starts, ensuring that users can operate the machines with confidence.

For convenience, the mowers also feature large, easy-roll wheels that enhance maneuverability. The inclusion of a bagging system offers an option for collection of grass clippings, contributing to a cleaner lawn appearance post-mowing.

In summary, the National Mower 68 DL and 68 SR combine advanced engineering with user-friendly features that prioritize performance and safety. They are exceptional choices for anyone looking to maintain a pristine lawn with minimal effort, making yard work a more enjoyable task. Whether for home use or professional landscaping, these mowers stand out in their class, delivering reliable performance time after time.