National Mower 68 SR, 68 DL owner manual Maintenance, Lubrication

Page 18

MAINTENANCE

LUBRICATION

Lubricate the machine at the recommended locations and intervals using the proper lubricants to ensure maximum service and long life of your machine.

Lubrication locations must be free of dirt and grass clippings and be well lubricated for proper operation.

The location and number of all lubricating points are listed in the chart below. The type and frequency of lubrication is specified. Use the following photos to locate the lubrication points on the mower.

DIFFERENTIAL

Since the mower does not operate at high speeds, the grease level in the differential is not critical providing that there is sufficient grease to coat the gears. Unless

leakage is evident, it is recommended that the grease be checked once each year. Check grease level by loosening the bolts in the differential case flanges and spreading case halves. It is not necessary to totally disassemble the case or remove the wheels for this inspection. Add Multi- purpose Gear Grease such as Pennzoil No. 303 or equivalent if necessary. Total grease capacity is 1-1/2 pounds (0.68 kg).

 

 

Do not use oil in the differential case

 

CAUTION

 

in place of grease–it will leak through

 

 

 

 

the seals.

ENGINE

 

Refer to the engine manual (separately furnished) for proper lubrication and maintenance instructions.

 

ITEM

LOCATION AND NUMBER

TYPE

FREQUENCY

 

 

 

 

 

 

 

 

1

Front wheel bearings (2)

Grease

Daily

 

 

 

 

 

 

 

 

2

Steering kingpin (2)

Grease

25 hours

 

 

 

 

 

 

 

 

3

Front axle to frame pivot (2)

Grease

25 hours

 

 

 

 

 

 

 

 

4

Steering column (2)

Grease

25 hours

 

 

 

 

 

 

 

 

5

Brake pedal pivot (1)

Oil

Daily

 

 

 

 

 

 

 

 

6

Idler pivot bracket (1 - 68 DL only)

Grease

25 hours

 

 

 

 

 

 

 

 

7

Main engine clutch handle (1)

Oil

Daily

 

 

 

 

 

 

 

 

8

Wing mower clutch handle (1)

Oil

Daily

 

 

 

 

 

 

 

 

9

Upper countershaft (1)

Grease

Daily

 

 

 

 

 

 

 

 

10

Lower countershaft (1)

Grease

Daily

 

 

 

 

 

 

 

 

11

Wing mower pull rods (4)

Grease

Daily or as required

 

 

 

 

 

 

 

 

12

Rear axle (2)

Grease

25 hours

 

 

 

 

 

 

 

 

13

Input-shift tube (1)

Grease

25 hours

 

 

 

 

 

 

 

 

14

Brake drum tube (1)

Grease

25 hours

 

 

 

 

 

 

 

 

15

Main axle tube (1)

Grease

25 hours

 

 

 

 

 

 

 

 

16

Seat hinge (2)

Grease

Daily

 

 

 

 

 

 

 

 

17

Rear mower lift arm pivot (1)

Grease

25 hours

 

 

 

 

 

 

 

 

18

Rear mower pivot tube (1)

Grease

25 hours

 

 

 

 

 

 

 

 

19

Rear mower countershaft (2)

Grease

Daily

 

 

 

 

 

 

 

 

20

Rear mower clutch (2)

Grease

Daily

 

 

 

 

 

 

 

 

21

Wing mower lift arm pin (4)

Grease

25 hours

 

 

 

 

 

 

 

 

22

Cutting reel bearings (6)

Grease

Daily

 

 

 

 

 

 

 

 

23

Height of cutter adjuster threaded shaft (6)

Grease

Yearly or as required

 

 

 

 

 

 

 

 

24

Threaded shaft and bracket (6)

Grease

Yearly or as required

 

 

 

 

 

 

 

 

25

Swivel block (6)

Grease

Yearly or as required

 

 

 

 

 

 

 

 

26

Belt clutch idler arm (68 DL only)

Grease

Daily

 

 

 

 

 

 

 

18

27

Transport clutch foot pedal (68 DL only)

Grease

Daily

68OM-06/03

 

 

 

 

 

 

 

 

Image 18
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.