New Camshaft Has Improved Wear Resistance
Usage:
3306, 3306B Engines
Description of Change: A new camshaft, with higher carbides, is now used. The higher carbides provide more resistance to spalling, pitting and wear. The follower did not change.
Adaptable To: The new 7E9980 Camshaft is a direct replacement for the former 7C3863 Camshaft. The new camshaft is effective with engine serial numbers 08Z57268, 13Z23027, 63Z19144, 64Z9679, 84Z1806, 85Z6799, 7JB4776, 2AJ371, 5KD2476. The new camshaft is serviced only in a kit. The new 4P2942 Cam Kit replaces the former 9Y1722 Cam Kit and includes the 7S3161 Valve Lifter and 8T2998 Lubricant.
Caterpillar Information System:
1990/11/01 New Bearing Kits Used In Turbocharger Cartridge Groups
1990/11/01 New 4C5084 Oil Filter Cutter Replaces Former 6V7905 Filter Cutter
1990/11/01 New 7X1400 Digital Diagnostic Tool (DDT) Group Available
1990/11/01 Adjustable Exhaust Bypass Group Used; Provides More Precise Ability To Set Exhaust Pressure
1990/10/01 New Oil Filler Group Prevents Oil Loss When Filling With Engine Running
1990/10/01 Increased Tension Applied To Cylinder Head Studs
1990/10/01 New Air Shutoff Groups Prevent Air Leaks And Wear
1990/10/01 Engine Commissioning And Diagnostic Kit
1990/10/01 New Pump Group With Bolt Dampers Used In Oil Pump Group
1990/10/01 Add Bolt Dampers To Oil Pump Mounting Bolts To Prevent Bolt Failures
1990/10/01 New "On Engine" Adjustment Procedure For 3161 Woodward Governor
1990/10/01 Additional Clip And Hardware Prevent Damage To Fuel Line Of 4W6887 Instrument Panel
1990/11/01 Governor Control Motor Polarity May Require A Change
1990/11/01 Modification Of 1U7791 Valve Seat Driver
1990/11/01 New Exhaust Manifold Gasket And Locks Used In Exhaust Manifold Groups
1990/11/01 New Stronger Exhaust Valve Push Rod Used In Valve Mechanism Groups
1990/11/01 Setscrew And Nut Available For Fuel Setting And Injector Synchronization
1990/11/01 New Crankshaft Seal Groups Used
1990/11/01 Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability
1990/11/01 New Cylinder Head Gasket And Higher Cylinder Head Bolt Torque
1990/11/01 New Alternator Drive Pulley Seal Used With New Drive Pulley; Poly-Vee Belt Can Be Installed
1990/11/01 New Turbocharger Gas Inlet Housings Used
1990/11/01 Correct Operation And Alignment Of Parts Eliminates 7W3976 Shaft Failures In 50:1 Barring Device
1990/11/01 Additional Serviceable Components in Electric Starter Group