National Mower 68 DL, 68 SR owner manual Part No. Description Qty, Shifter Lever

Page 39

68OM-06/03

REAR AXLE & DIFFERENTIAL

Item

Part No. Description

Qty.

Item

Part No.

Description

Qty.

39

104502

2200675

3205434

407007

504021

604022

7200061

8200103

906102

1008010

11201432

1208037

13205450

14200676

1506101

1607003

17200234

18200051

1904008

20200054

21200050

2206003

23200049

24200069

2507009

26200065

27200079

2806005

29200680

3003504

31200084

3203503

34200075

3506004

SPRING, Shifter Lever

BUSHING, Shifter Lever Bushing

SHIFTER LEVER

GRIP, Shifter

CLEVIS, Brake

PIN, Brake Pedal, 3/8" x 1-1/4"

STOP DISC, Shifter

ROD UNIT, Brake

NEEDLE BEARING, Rear Countershaft

U-BOLT, Shifter

BRACKET,Parking Brake Pull

ROD, Formed, Parking Brake

LEVER, Parking Brake

BUSHING

NEEDLE BEARING, Intermediate Shaft

GASKET, Back Plate Cover

COVER, Differential Case, Inside

SLIDING WASHER, Differential Case

PIN, Spring (Roll PIn), 5/16" x 1-1/8"

GEAR, Shifting, 11 Tooth

GEAR, Reverse

BUSHING, Reverse Gear

SHAFT, Reverse Gear

PINION, Differential

GASKET SET, Differential

COVER, Differential Case, Outside

HUB, Rear Wheel, Right

BUSHING, Rear Wheel Hub

DUST WASHER, 1-1/8"

O-RING, 1-1/8"

SPLIT DISC SEAL, Wheel Hub, Right Rear

SEAL, Oil

AXLE ASSEMBLY, Rear

BUSHING, Bull Gear

1

1

1

1

1

1

1

1

2

1

1

1

1

1

2

1

1

1

1

1

1

1

1

4

1

1

1

2

1

1

1

1

1

2

3609012

37200066

38200070

3902607

40200088

4106103

4202510

4303510

4402510

4506104

46200687

200821

47200685

200688

48200095

49200096

50200090

5104016

5204013

5304020

54200099

5503502

5602603

5703618

58200097

5904012

60200055

6104011

62200102

6302602

6403511

65200056

66200063

67200676

6804547

RETAINING RING, Pinion gear

1

BULL GEAR ASSEMBLY, Complete

1

SHAFT UNIT, Intermediate

1

WASHER, 1-1/8" I.D.

1

SLEEVE, Axle Bearing

1

BEARING, Right Axle

1

SPACER, Right Axle

1

SEAL, Rear Axle

1

WASHER, Bearing, Left Axle, 1-1/8"

1

BEARING, Left Axle

1

SHIM, Left Axle, 10 Ga.

AR

SHIM, Left Axle, 14 Ga.

AR

SPACER, Left Axle, 1/32"

AR

SHIM, Axle Spacer, 22 Ga.

AR

COLLAR, Rear Axle

1

CAP, Left Axle

1

WHEEL HUB, Left Rear

1

PIN, Collar, Rear Axle, 1/4" x 1-3/4"

1

KEY, Woodruff, #11

4

LOCK RING, 7/8"

1

BRAKE BAND ASSEMBLY

1

O-RING, 7/8"

1

DUST CAP, 7/8"

1

PULLEY, Step

1

BRAKE DRUM

1

KEY, Woodruff, #9

1

SHAFT, Shifting Countershaft

1

LOCK RING, 3/4"

1

LEVER, Brake Band

1

DUST CAP, 3/4"

1

O-RING, 3/4"

1

COUNTERSHAFT CARRIER UNIT, Shifting

1

CARRIER, Shifter

1

BUSHING, Shifter Lever

1

SPRING

1

® NATIONAL 68 SR & DL TRIPLEX

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Image 39
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 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 ShipmentAssembly SeatRear Cutting Unit Engine Reel to BED Knife AdjustmentRear Cutting Unit Belt National 68 SR & DL Triplex Wing Cutting UnitsPreparation OperationMain 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 AdjustmentAdjusting Drive Belt Tension Main Drive Belt Tension Main Countershaft to Rear DriveRear 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 SeriesBelt 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.