1981/05/20 Caterpillar


Crankshaft Failures; New Thrust Plate

Usage:


All 3408 and 3412 Engines

Description of Change: A new crankshaft thrust plate is used on 3408 and 3412 Engines. The new thrust plate has an 11% increase in the thrust area which will permit the plate to withstand high thrust bearing loads and operate at a lower temperature than the former thrust plate.

Adaptable To: The new 1W5252 Plate is a direct replacement for the former 7N8947 Plate in 3408 and 3412 Engines.

Caterpillar Information System:

1981/05/20 New Tool Makes Glow Plug Wire Removal Easier
1981/05/20 Safety: Battery Vent Caps
1981/05/20 Change Made To Power Take-Off Adapter Housing
1981/05/20 Replacement Thermostat, Element Assemblies Available For Jacket Water Heater
1981/05/20 Remove And Install Cam Bearings With 6V4077 Cam Bearing Tool Group
1981/05/20 Use 6V4069 Body Group To Remove Tapered Drive Sleeve
1981/04/22 6V3197 Spacer, 6V3041 Tool Group Available For Use During Removal And Installation Of Piston Pin Bearings
1981/04/22 Improve Use Of Engine Service Manual Microfiche
1981/04/22 List Of Service Publications
1981/04/22 New Spacer And Plate Used In Transmission Lower Shaft Groups
1981/04/22 Woodward Governor Available For Parallel Generator Applications
1981/04/22 Check Operation Of Hydramechanical Shutoff At Specific Intervals
1981/05/20 6V4020 Piston Ring Expander Group Available
1981/05/20 Larger Valve Springs
1981/05/20 List Of Service Publications
1981/05/20 Different Check Valve Gives Faster Shifts
1981/05/20 Installation Of Rear Bearing Oil Seals In 3N6542, 3N8617, And 3N8618 Rear Power Takeoff Clutch Groups
1981/05/20 Use 6V4089 Reamer Assembly To Clean Nozzle Bores
1981/05/20 Hardened Nuts And Higher Torque Now Used In Ahead And Astern Clutch Groups
1981/05/20 Washer Added Between Bolt And Thrust Plate For Oil Pump Idler Gear
1981/06/03 Replacement Bushings For Delco-Remy Electric Starting Motors Must Be Machined For Correct Clearances
1981/06/03 Use Correct Specifications To Check Piston Ring Gaps
1981/06/03 New Cover Assembly And Gasket Used In Oil Pump Group
1981/06/03 Locks No Longer Used On Flywheel Bolts; New Torque Specifications For Flywheel Bolts
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