1982/02/24 Caterpillar


New Main Bearings And Connecting Rod Bearings Have Thicker Layer Of Surface Material

Usage:


D379, D379B, D398, D398B And D399 Industrial And Marine Engines

Description of Change: New main bearings and connecting rod bearings, which have a thicker surface material, are used in the above engines. The lead-tin layer has been increased in thickness to 0.020 mm (.0008") - 0.030 mm (.0012") from 0.008 mm (.0003") - 0.020 mm (.0008").

The thicker layer gives the bearing the ability to better adjust to the crankshaft journals and give longer service life than the former bearings.

Adaptable As: The new 8N7764 Main Bearings are direct replacements for the former 2N7048 Main Bearings which are canceled. The new 8N7769 Rod Bearings are direct replacements for the former 4L3763 Rod Bearings which are canceled. These are standard size bearings.

Caterpillar Information System:

1982/02/24 Engine Storage; Engine Start-Up After Storage
1982/02/24 New Fuel Nozzle Adapter Assembly Used
1982/02/24 New Camshaft Has Improved Profile (Shape) Of Exhaust Cams
1982/02/24 New Engine Testing And Adjusting Tools Give More Accuracy And Longer Service Life
1982/02/24 List Of Service Publications
1982/02/24 "SIRS User Instructions" Available
1982/02/10 New Flywheel Assemblies Used
1982/02/10 Gasket Kits
1982/02/10 New Crankshaft Seal Group Has Assembled Rear Seal And Wear Sleeve
1982/02/10 Bent Lever For Fuel Shut-Off Solenoid Can Cause Low Engine Performance
1982/02/10 New Parts Used In Hydramechanical Shut Off; Prefill Oil Pump
1982/02/10 New Piston Pin Retainer Used
1982/02/24 New Poppet Valve Will Decrease Chatter
1982/02/24 New Inlet And Exhaust Valves And Exhaust Inserts Available
1982/02/24 New Idler Shaft Used In Fuel Transfer Pumps
1982/02/24 Use 6V6035 Hardness Tester On Crankshafts
1982/02/24 Use The Correct Governor For Parallel Applications
1982/03/17 New Diaphragm Used In Fuel Ratio Control
1982/03/17 New Adapters And O-Ring Seals Used In Aftercooler Group
1982/03/17 Correct Lubrication Procedure Will Prevent Damage To Fan Drive
1982/03/17 New Gasket Used In Governor And Fuel Injection Pump Group
1982/03/17 Improved Bearing Used In Rear Power Takeoff Groups
1982/03/17 Heavy Duty Air Cleaner Available, With Precleaner And Automatic Dust Ejector
1982/03/17 New Double-Wall Fuel Injection Lines Group And Fuel Drain Group Available As Attachments For Protection Against Fuel Leakage
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