New Cylinder Liner Available
Usage:
3400 Series Truck Engines
Description of Change: A new cylinder liner is available for use on the engines listed above. The new cylinder liner decreases the liner-to-block diametral clearance from .305 ±.102 mm (.0120±.0040") to .152±.102 mm (.0060 ±.0040"). The change will help prevent O-ring seal fretting caused by cylinder liner motion.
Adaptable As: The new 7W3550 Liner is in effect with 3406B Truck Engines 7FB38551 and 3408 Truck Engines 28V4749 and can be adapted to all earlier engines.
Caterpillar Information System:
1986/02/01 Truck Engine Performance Checklist Available For North American Dealers
1986/02/01 Longer Bolts Used In Turbocharger Air Lines Groups
1986/02/01 New 8T2998 Lubricant Available
1986/02/01 High Silicates In Antifreeze
1986/01/01 How To Use Temperature And Pressure Probes With Self-Sealing Probe Adapter Groups
1986/01/01 Oil Total Base Number (TBN) Test Kit Available
1986/01/01 Fuel Sulfur Analyzer Available
1986/01/01 Put Grease On Front Crankshaft Seal Before Installing The Crankshaft Pulley And Damper
1986/01/01 New Service Tools Available
1985/12/01 Later 3406B And 3408B Truck Engines Have Higher Minimum Coolant Temperatures
1985/12/01 Gasket Leakage On Aftermarket Fuel Filters
1985/12/01 New, Tougher Gasket Used Between Block And Front Housing
1986/02/01 Special Instructions Packaged With Turbocharger Cartridge Repair Kits May Be Incorrect
1986/02/01 Incorrect Air Compressor Installation Can Cause An Early Failure
1986/02/01 Attention "New" Caterpillar BrakeSaver Owners!
1986/03/01 Screens Added To Inlet Air Manifolds
1986/03/01 Nylon Seals Used On Lockwire To Seal Critical Areas; Parts Service Seals Available For NACD Dealers
1986/03/01 Improved Cylinder Head Gasket
1986/03/01 Stronger Oil Pan Used
1986/03/01 Improved Sleeve Bearing Used In Drive End Of Fuel Injection Pump Housing
1986/03/01 Air-To-Air Aftercooler Test Group Available
1986/04/01 Silicone Rubber Hoses Available For Engine Oil Cooler Water Lines
1986/04/01 New Air-to-air Aftercooler Arrangements Used On Truck Engines
1986/04/01 Bleed Screw Washer (seal) Must Be Replaced If Bleed Screw Removed From Fuel Nozzle