1981/04/22 Caterpillar


New Piston Ring Assemblies Give Improved Ring And Cylinder Liner Life

Usage:


D353 Industrial And Marine Engines;
D379, D398, D399 Industrial, Marine and Generator Set Engines

Description of Change: New piston ring assemblies (oil control) are used in the above engines. The new ring assemblies use a different spring to decrease the ring pressure against the cylinder liner. This permits increased oil flow to the top piston ring area. The result is improved ring and cylinder liner life.

Adaptable As: The new 1W5061 Ring Assembly is in effect with the Serial Numbers shown in Chart A. Chart B has the ring groups which are available for parts service.

Caterpillar Information System:

1981/04/22 Check All Settings When Fuel Injection Pump Group Is Installed
1981/04/22 Cooling System Cleaner Removes Rust And Corrosion
1981/04/01 New Aftercooler Core Has Improved Design To Prevent Vibration Damage Which Lets Coolant Into Engine Air Inlet
1981/04/01 Fuel Pressure Relief Valve Is Shown Inverted (Wrong End Up) In Parts Book Illustrations
1981/04/01 6V4009 Dowel Driver Available
1981/04/01 Correct Installation Of Inserts Necessary During Repairs To Prevent More Counterbore Cracks
1981/04/01 Test Procedure For Exciter Reactors On SRSE Generators
1981/04/01 New Shield Assemblies Used In Water Shielded Manifold Group
1981/04/01 Different O-Ring Seal Now Used On The Oil Pump Suction Tube
1981/04/01 New Inlet And Exhaust Valves And Valve Guides Have Tighter Fit To Prevent Corrosion And Guide Wear
1981/04/01 Brass Plug Now Used Instead Of Steel Plug In Sea Water Aftercooler
1981/04/01 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier
1981/04/22 New Ahead Main Shaft Assembly Gives A Tighter Fit; Dimensions For The Fit Of Shafts And Gears
1981/04/22 FT1585 Plate Can Be Fabricated For Governor Spring Guide Replacement
1981/04/22 6V3150 Engine Pressure Group Gives Direct Indication Of Manifold Pressure
1981/04/22 Check Operation Of Hydramechanical Shutoff At Specific Intervals
1981/04/22 Woodward Governor Available For Parallel Generator Applications
1981/04/22 New Spacer And Plate Used In Transmission Lower Shaft Groups
1981/04/22 List Of Service Publications
1981/04/22 Improve Use Of Engine Service Manual Microfiche
1981/04/22 6V3197 Spacer, 6V3041 Tool Group Available For Use During Removal And Installation Of Piston Pin Bearings
1981/05/20 Use 6V4069 Body Group To Remove Tapered Drive Sleeve
1981/05/20 Remove And Install Cam Bearings With 6V4077 Cam Bearing Tool Group
1981/05/20 Replacement Thermostat, Element Assemblies Available For Jacket Water Heater
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