1988/12/01 Caterpillar


New Camshaft Used; Camshaft Installation Kit Available

Usage:


3306B Truck Engines

Description of Change: A new camshaft with harder cam lobes, improved heat treat processing, and a larger diameter between No. 1 and No. 2 bearing journals is used in 3306B Truck Engines. The new camshaft has more resistance to lobe pitting and torsional vibration.

Adaptable To: The new camshaft with all three improvements is effective with 3306B Truck Engine 63Z3300 and 5KD398. It can be installed in earlier 3306B and in 3306 (76R) Truck Engines.

If the new camshaft is installed, use a complete set of new lifters and coat the shaft lobes with the special cam lubricant. Used lifters probably will not have the same service life as the new camshaft, resulting in additional repairs and downtime. For this reason, the new camshaft kit listed in the chart should be used when a new shaft is installed.

Caterpillar Information System:

1988/12/01 Larger Valve Springs Must Be Used With Williams Blue Ox ® 485 kPa (70 psi) Exhaust Brake; New Spring Compressor Group Available
1988/12/01 Revised Instructions For Installation of New Maintenance Free Batteries
1988/11/01 $25 Rebate For Members Of Caterpillar Truck Engine Owners Club (U.S. Only)
1988/11/01 New Liner Seat Insert Available
1988/11/01 Be Sure To Follow Cooling System Recommendations
1988/10/01 List of Service Publications
1988/10/01 New Service Tools Available
1988/10/01 Check Valve Added To Keep Air From Entering Fuel System
1988/10/01 New Graphite Exhaust Manifold Gasket Replaces Stainless Steel Gasket
1988/10/01 New Flywheel Assemblies Used In With Rear PTO Arrangements
1988/10/01 Self-Locking Bolts Used In Front Timing Gear Group
1988/10/01 Head Bolt Holes In Cylinder Blocks Can Be Repaired
1988/12/01 Rechargeable Portable Printer Available
1988/12/01 New Mounting Bolts Used In Aftercooler Housings
1989/01/01 New Head Gasket Available; Head Gasket Replacement Guidelines
1989/01/01 Correct Timing Specification
1989/01/01 New Screw Used In Brakesaver Water Lines Group
1989/01/01 Remove Fuel From Electronic Control Module (ECM) Before Shipping
1989/01/01 New Special Instruction Available - "Storage Procedure For Caterpillar Products"
1989/01/01 High Performance Maintenance Free Battery Available
1989/01/01 List Of Service Publications
1989/02/01 Troubleshooting 3406B (PEEC) Truck Engines Equipped With Power Demand Cruise Control (PDCC)
1989/02/01 Cold Start Procedures For 3406 (PEEC) Truck Engines
1989/02/01 New Publication Available- "Coolant And Your Engine"
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