1994/10/01 Caterpillar

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

Usage:

3400 Family Of Commercial Engines

Reference: Engine News, September 1992, Page 1, "Major Engine Component Changes". Engine News; January 18, 1984; Page 1; "Service Information For Balancers And Dampers".

Description of Change: A new rubber damper assembly is used on the 3400 Family of Commercial 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 Fuel Priming Pump Can Be Installed On Either Left Or Right Side Service Fuel Filter Groups {1258}

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

1994/09/01 Different Emergency Stop Push Buttons for Electronic Modular Control Panel II (EMCP II) {4490,4450}

1994/09/01 Reworking Diesel And Gas Cylinder Heads On 6.25 Bore V Engines {1101}

1994/09/01 New Rear Camshaft Segments With Stronger Camshaft Flange Used {1210}

1994/09/01 Use Thread Lock On Bolts That Fasten Aftercooler Housing To Cylinder Block {1063}

1994/09/01 Turbocharger Turbine Nozzle Reusability Information {1052}

1994/09/01 New Operation And Maintenance Videos Available {0374}

1994/09/01 Improved Knock (Detonation) Sensor Group Replaces Detonation Sensor {1559}

1994/09/01 New Gasket Used In The Water Lines Group {1380}

1994/09/01 New Plunger In Fuel Pressure Regulating Valve {1250}

1994/09/01 New Cylinder Liner, Spacer Plate, Spacer Plate Gasket, And Cylinder Head Gasket Used {1216,1221,1124}

1994/10/01 Adjustment Of Air/Fuel Ratio Control Setting {1278}

1994/10/01 New Governor Control Assembly to Improve Acuator Stability {1289}

1994/10/01 New Spark Plug Tightening Specifications For Engines With Canadian Standards Association (CSA) Ignitions {1550}

1994/10/01 Longer Inch Cylinder Head Bolt Provides Increased Thread Engagement {1100}

1994/10/01 Remanufactured Crankshaft Interchangeability; Remanufactured "Upgrade To New" (UTN) Availability {1202}

1994/10/01 New Higher Capacity Oil Pump Used {1304}

1994/10/01 New Gas Pressure Regulator Assembly Used To Provide Increased Parts Commonality {5503}

1994/10/01 New 106-7408 Engine Oil Film (Decal) Available {7557}

1994/10/01 New Intake Valve Lash Setting {1105}

1994/10/01 New Prechamber Assembly Used In Prechamber Group; New Specifications For Prechamber Group {1106}

1994/10/01 Repair Kit Is Available For Long Stroke Fuel Ratio Control Group Used With 3161 Governors {1278}

1994/10/01 Procedure For Tightening 067-9921 Tee In 9Y-3300 Prelube Pump Oil Lines Group {1307,1319}