1987/09/07 Caterpillar

New O-Ring Seals Used In Water Lines{1350}

Usage:

3500 Family Of Engines

Description of Change: Different O-Ring seals are used in the various water lines groups for the 3500 Family of Engines. The new seals are made from Ethylene Propylene Diene Modified (EPDM) rubber. The new EPDM rubber seals have more resistance to hardening or taking a set. They also are more resistant to wear caused by vibration.

Oil contact with the new EPDM rubber seals must be avoided because they will swell and soften with direct contact to oil, fuel or other petroleum based materials. Oil contamination from handling and assembly can cause the seals to deteriorate. Use water, soapy water or glycerine when handling the seals during assembly.

Adaptable As: The new EPDM rubber seals are direct replacements for the former seals in the above engines. The chart lists the seals frequently used in the above engines and provides a cross reference between the former seals and the new EPDM rubber seals.

Caterpillar Information System:

1987/09/07 Be Sure To Correctly Tighten Turbocharger Clamp Assemblies{1052}

1987/09/07 Use The Marketing Publications Information Feedback System{0374}

1987/09/07 Improved Warranty For Remanufactured Parts And Components{7754}

1987/08/31 Metal Protectors Replace Plastic Protectors On Head Studs {1100}

1987/08/31 Recommendations For Preventing Cooling System Damage {1201}

1987/08/31 Improved Clutch Piston And Retraction Pins Available {3302}

1987/08/24 New 8T8726, 8T8694 And 8T8695 Adapter Cable Assemblies Available{0600}

1987/08/24 New 8T5282 Programmable Electronic Engine Control Digital Diagnostic Tool Group (PEEC DDT) Available{0600}

1987/08/24 New 8T8697 Electronic Control Analyzer Programmer (ECAP), 8C5919 Electronic (ECAP PEEC) Conversion Group and 8T5275 Adapter Cable Assembly (T-Harness Cable) Available{0600}

1987/08/24 Dynamic Timing Charts Available For Most Popular 3208 And 3406 Truck Engine Ratings{1272}

1987/08/24 Additional Engine Tilt Installation Angles And Engine Dipstick Markings{1326}

1987/08/24 Engine Oil Refill Capacity Decreased{1213,1326}

1987/09/14 Remanufactured Air Conditioner Compressor Available {1802}

1987/09/14 Four More Remanufactured Fuel Pump And Governor Groups Available {1286}

1987/09/14 Remanufactured 3208T Economy Truck Engine Available {1000}

1987/09/14 New Turbochargers Have Several Improvements {1053,1066}

1987/09/14 Mid-Life Bearing Maintenance Recommendations {1203}

1987/09/14 New Piston Cooling Jets Used {1213,1214}

1987/09/14 New Digital Pyrometer Which Incorporates High Exhaust Temperature Alarm Now Used {1606,7412,7450,7466}

1987/09/14 Oil Flow Increased For Inlet Valve Lubricator {1105}

1987/09/21 New Adapters Available For Metric Test Ports So That SAE Connectors Can Be Used{0784}

1987/09/21 New Alternator Used In Charging Alternator Groups{1405}

1987/09/21 New Hydraulic Steering Mounting Group Available{4306}

1987/09/21 Single Lip Hydrodynamic Seal Used In Water Pumps{1300,1361}