National Mower 68 DL, 68 SR owner manual Safety and Control Decals, Main Engine Clutch Lever

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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.

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

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.

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.

WARNING NEVER USE THE TRANSPORT CLUTCH WHILE THE CUTTING

UNITS ARE TURNING, OR WHEN THE DIFFEREN- TIAL SHIFT IS IN REVERSE.

07585 – ENGINE THROTTLE (located on steering wheel)

Move the engine throttle lever forward for fast speed, backward for slow speed

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.

07586 – IGNITION KEY (Model 68 DL)

(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.

68OM-06/03

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Contents Model 68 SR Triplex Mower Model 68 DL Triplex Mower There is no Other Warranty Expressed or Implied ONE Year Limited WarrantyNational Mower Company Introduction Table of ContentsOperation Safety InformationNational Mower Safe Operating Practices Training PreparationTraining MaintenanceISO Safe Operating Practices Hill OperationCalifornia 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 ShipmentSeat AssemblyRear Cutting Unit Engine Reel to BED Knife AdjustmentRear Cutting Unit Belt National 68 SR & DL Triplex Wing Cutting UnitsOperation PreparationMain Clutch Lever Wing Cutting Unit Latch Rear Cutting Unit Lift Arm Seat Position Adjuster LeverTransport Clutch Model 68 DL only Rear Cutting Unit ClutchParking Brake Lever Safety SwitchesIgnition Switch Model 68 DL shown Service BrakeDIAL-A-HEIGHT Adjuster Optional Height of CUT AdjustmentOther Adjustments Standard AdjustersLubrication MaintenanceLubrication Points Maintenance Lubrication Points Brake Adjustment Reel AdjustmentsReel END Play Adjustment Height of CUT AdjustmentMain Drive Belt Tension Main Countershaft to Rear Drive Adjusting Drive Belt TensionRear Cutting Unit Drive Belt Tension Rear Cutting Unit Chain Tension BED Knife ReplacementGrinding Reels Back Lapping ProcedureIntroduction Recommended StepsMaintenance 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 DLSound & Vibration Levels SpecificationsMower Dimensions & Weight Engine Briggs & Stratton 138400 SeriesParts Ordering Information Belt CROSS-REFERENCE ChartFunction National Number Belt Mfr Number Declaracion DE Conformidad Déclaration DE ConformitéConformiteitsverklaring 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.