1994/10/03 Caterpillar

Drive Shaft Lubrication Requirements{3253}

Usage:

D20D (9MG),
D250D (6NG),
D300D (5MG),
D25D (1HK),
D30D (3AJ, 1PK),
D350D (9RF),
D40D (2JJ),
D400D (8TF, 4EJ) Articulated Trucks

Reference: Service Magazine Special Edition; Major Improvements And Service Information For D20D, D250D, D300D, D25D, D30D, D350D, D40D And D400D Articulated Trucks; June 1, 1994; Page 101; "New Drive Shafts Give Longer Service Life".

There has been some confusion concerning driveshaft lubrication. The new driveshafts announced in the reference material do not require lubrication. Use the following information to determine the type of driveshaft on the machine and if the driveshaft requires periodic lubrication.

Illustration 1. New driveshafts announced in the reference material. (1) Lip-type seal. (2) Plastic coating.

The new driveshaft has a lip-type seal instead of the felt washer and does not have a removable cap. The spline shaft has a plastic coating and is about the same size as the outside diameter of the driveshaft.

Although the new driveshafts do not have grease fittings and do not require lubrication, continue to grease the universal joint spiders as outlined in the Operation And Maintenance Manuals.

Illustration 2. Former driveshaft. (3) Grease Fitting. (4) Cap. (5) Felt Washer

The former driveshaft needs periodic lubrication as outlined in the Operation And Maintenance Manuals. The former driveshafts can be identified by the grease fitting on the driveshaft and the removable cap. The spline shaft of the former driveshaft has a felt washer for a seal and is smaller than the outside diameter of the driveshaft.

Caterpillar Information System:

1994/10/03 New Flexible Exhaust Assembly Has Longer Service Life{1061}

1994/10/03 New Flexible Lines Used In Aftercooler Water Lines Group{1380,1063}

1994/09/26 New Gasket Provides Improved Sealing Between Air Compressor And Drive{1803}

1994/09/26 New Gears Reduce Noise And Pipe Plugs Make Installation Easier In Auxiliary Drive Group{1150,1165}

1994/09/26 Exhaust Dust Ejector Operation{1055,1068}

1994/09/26 Arc Suppressors Improve Life of Air Conditioner Thermostatic Switch{7337}

1994/09/26 Engine Maintenance Check Deleted{1100}

1994/09/26 New Hitch Seal And Retaining Ring Used In Rear Frame Groups Reduces Hitch Face Wear{7051}

1994/09/26 Maintenance Guidelines For Exhaust Bypass Group{1057}

1994/09/26 Bolts Are Now Used In The Steering Linkage Group/Torque Specification Has Been Raised{4305}

1994/09/26 Muffler Group and Exhaust Piping Groups Changed To Provide A New Slip-Fit Muffler{1062,1061}

1994/09/26 New Gears Are Available To Reduce Transfer Gear Noise Levels{3159}

1994/10/03 Special Instruction SEHS9803 Is Available For Reinforcing The 7U-1598 (Center) And 7U-1599 (Rear) Frame assemblies To Prevent Cracking{7200}

1994/10/03 New Mounting Hardware for Leveling Blade Arms Improves Retention{6051,6061}

1994/10/03 Fan V-Belt Part Number Has Changed For Certain Models With The 3204 Engine{1357}

1994/10/03 Oversize Fuel Pump Drive Idler Shaft Available To Salvage Cylinder Block{1206}

1994/10/03 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material{1205}

1994/10/10 New Exhaust Flex Hose Used To Avoid Leaks From System Vibration{1058}

1994/10/10 New Oil Cooler And Hose Improves Routing{1374}

1994/10/10 New Transmission Oil Filter With Improved Seal Area{3164}

1994/10/10 Larger Stick Cylinder Piston Bolts Prevents Loosening{5458}

1994/10/10 Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing{4208,4234}

1994/10/10 New Driveline Yokes Have Improved Sealing And Seal Protection{3253,3250}

1994/10/10 New Differential And Bevel Gear Group And New Axle Housing Used In Axle Drive Group To Increase Service Life{3260,3280}