1994/10/01 Caterpillar

New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material{1205}

Usage:

3406, 3406B, 3406C, 3406E, 3408, And 3408B Truck Engines

Reference: Truck Engine News, October 1992, Page 3, "3406 Truck Engine Component Update". Truck Engine News; December 21, 1983; Page 1; "Service Information For Balancers And Dampers".

Description of Change: A new rubber damper assembly is used on 3406C, 3406E, And 3408B Truck Engines. The new damper contains an improved rubber material. The improved rubber material provides the following:

* Increased temperature resistance

* 25 percent higher damping

* Improved resistance to stiffening with time

* Improved bonding

Adaptable To: The new 108-4096 Damper Assembly replaces the former 2P-5149, 4P-4297, 9Y-4851, and 108-4097 Damper Assemblies. The new damper assembly is in effect as listed in the chart.

NOTE: Do NOT use a rubber damper on engines originally equipped from the factory with a 2P-4645 or 7E-9520 Viscous Damper Assembly.

The damper assembly part number is approximately 3.0 mm (.12 in) high, STAMPED on the front or back of the outer ring.

Caterpillar Information System:

1994/10/01 Check 9U-7242 Valve Spring Compressor Plate For Correct Thickness{0703}

1994/10/01 Corrections To 3176B/3406E Electronic Troubleshooting Guide{0374,1901}

1994/10/01 New Rear Crankshaft Seal Groups Available{1161}

1994/10/01 Catalytic Converter/Muffler Identification{1062,1091}

1994/09/01 Caterpillar Legendary Service Literature Catalog SELD0811 Updated{0374}

1994/09/01 117-7213 Control Group (Vehicle Speed Filter) Available For Field Installation{1914}

1994/09/01 New Gasket Provides Improved Sealing Between Air Compressor And Drive{1803}

1994/09/01 Impeller Appearance On Remanufactured 3406 Water Pump{1364,1361}

1994/09/01 New Seals In Pump Fastener Group And Fuel Injection Pump Group Have Improved Heat Set Resistance{1251}

1994/09/01 Additional Parts Now Provided With 0R-4180 Remanufactured Cylinder Head Assembly{1100}

1994/09/01 Turbocharger Popping Noise Does Not Cause Damage{1052}

1994/09/01 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems{1105}

1994/11/01 Verification of Connecting Rod Eye Bushing Retention When Overhauling Engines{1218}

1994/11/01 Fuel Injection Nozzle Reference {1254}

1994/11/01 Fuel System Pressure{1256}

1994/11/01 Unit Injector Removal And Installation{1290}

1994/11/01 Engine Oil Capacity Change{1326,7542}

1994/11/01 Be Sure Correct Piston Cooling Jets Are Installed{1331}

1994/12/01 Cold Weather Operation Reminder{0374}

1994/12/01 New Exhaust Manifold Gasket Available{1059}

1994/12/01 Black Painted Valve Covers Available{1107}

1995/01/01 New Oil for All Engines Burning Low-Sulfur Fuel (0.05% or less) Except The 3600 Family Of Engines{1318}

1995/01/01 Electronic Unit Injector (EUI) Replacement{1290}

1995/01/01 Description Of January 1995 (JAN95) Personality Module Changes {1902}