National Mower 68 DL, 68 SR ISO Safe Operating Practices, Hill Operation, Maintenance, Training

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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 embank- ments. 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.

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.

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NATIONAL 68 SR & DL TRIPLEX

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

WARNING 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.

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.

68OM-06/03

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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 Introduction Table of ContentsNational Mower Safe Operating Practices Safety InformationTraining Preparation OperationISO Safe Operating Practices MaintenanceHill Operation TrainingCalifornia Safe Operating Practices Maintenance and StorageMain Engine Clutch Lever Safety and Control DecalsSafety and Control Decals Height Adjuster Safety and Control Decals Uncrating Instructions Receipt of ShipmentRear Cutting Unit AssemblySeat Rear Cutting Unit Belt Reel to BED Knife AdjustmentNational 68 SR & DL Triplex Wing Cutting Units EngineMain Clutch Lever PreparationOperation Transport Clutch Model 68 DL only Seat Position Adjuster LeverRear Cutting Unit Clutch Wing Cutting Unit Latch Rear Cutting Unit Lift ArmIgnition Switch Model 68 DL shown Safety SwitchesService Brake Parking Brake LeverOther Adjustments Height of CUT AdjustmentStandard Adjusters DIAL-A-HEIGHT Adjuster OptionalLubrication MaintenanceLubrication Points Maintenance Lubrication Points Reel END Play Adjustment Reel AdjustmentsHeight of CUT Adjustment Brake AdjustmentRear Cutting Unit Drive Belt Tension Adjusting Drive Belt TensionMain Drive Belt Tension Main Countershaft to Rear Drive Rear Cutting Unit Chain Tension BED Knife ReplacementIntroduction Back Lapping ProcedureRecommended Steps Grinding ReelsMaintenance Record Situation Things To Check TROUBLE-SHOOTINGFrame & Running Gear Parts ListDescription Qty Rear Tire & Wheel AssemblyRunning Gear & MISC. Parts -- Model 68 DL Washer Seat Mounting & Belt GuardsDrive Mechanism -- Upper Portion Spring Drive Mechanism -- Middle Portion Drive Mechanism -- Lower Portion Drive Mechanism -- Model 68 DL Needle Bearing Rear Axle & Differential Shifter Lever Part No. Description QtyWing Cutting Units Roller Rear Cutting Unit Countershaft SKIDS, Reel END Shields & Guards Rollers & Standard Scrapers Description Qty. per Kit DIAL-A-HEIGHT Roller Scraper KIT, P/N 860033 includes itemsDIAL-A-HEIGHT Roller Adjuster KIT, P/N DIAL-A-HEIGHT ADJUSTER, P/N 205348 Response Safety SwitchesElectrical Diagrams Description Qty Model 68 SR Model 68 DL Electrical PARTS-- Models 68 SR & 68 DLMower Dimensions & Weight SpecificationsEngine Briggs & Stratton 138400 Series 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

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.
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