1999/05/01 Caterpillar

New Flywheel Housing Assembly Available{1157}

Usage:

All 3500, 3500 with EUI, and 3500B Commercial Engines

Description of Change: A new SAE Number 0 (single zero) flywheel housing assembly is available for these engines. The new flywheel housing assembly does not have a drain hole in the bottom. In some mobile equipment applications the driven equipment is not bolted to the flywheel housing assembly and the engine is subjected to high shock loads (g-forces). These conditions may cause cracks to develop around the drain hole of the standard flywheel housing assembly. The new flywheel housing assembly, without the drain hole, will help prevent these cracks.

Adaptable To: The new 169-7302 Flywheel Housing Assembly can be used as a replacement for the 105-3045 or 7W-3721 Flywheel Housing Assembly on these engines. The new flywheel housing assembly is only to be used in applications that do not require drain capability for the flywheel housing assembly.

Caterpillar Information System:

1999/05/01 New Basic Cylinder Head Group Used In 3500B High Speed Commercial Engines{1100,1103,1105}

1999/05/01 New Turbocharger Supports Help Prevent Watercooled Exhaust Manifold Cracking{1059,1052}

1999/05/01 New Breakout Harness{1559}

1999/05/01 Use 125-5597 Mounting Bar To Disassemble And Assemble Heat Exchanger{1379}

1999/05/01 New Stainless Steel Filler Neck Now Used In Radiator Groups{1353}

1999/05/01 New Block Cover Used{1201}

1999/05/01 New Design Of Cylinder Block And Main Bearings{1201,1203,1224}

1999/05/01 Cold Start Advance Solenoid Available{1272,1250}

1999/05/01 Use 157-3722 Driver To Remove And Install Engine Valve Guides{0703,1104}

1999/04/01 New Control Panel Films Show That SR4B Generators Are Not To Be Wired In The Delta Configuration{7557,7566}

1999/04/01 Updated 133-6350 EMCP II Generator Set Control Group Corrects Hourmeter Programming and Spare Fault Operation{4490}

1999/04/01 Special Instruction, REHS0345-01, "Generator Service Literature Index" Is Available{4450}

1999/05/01 Changes To High Pressure Gas Regulator Assembly Provide Improved Response{1270,1283}

1999/05/01 New High Pressure Air/Fuel Ratio Control (AFRC) Actuator Available For Operations In Wet Locations {1278}

1999/05/01 New Service Tool And Procedure To Test Detonation Sensor For Proper Performance{1559}

1999/05/01 Updates Available To Eliminate False Detonation And "No Magneto Interface" Nuisance Shutdowns{1900,1901}

1999/05/01 New Carbon Monoxide (CO) Emission Levels For Natural Gas Engine Applications{0376}

1999/05/01 New Manifolds Used In Exhaust Manifold Group{1059}

1999/05/01 New Silencer For 3600 Diesel Engines{1087}

1999/05/01 Center The Rocker Arm Shaft Assembly During Installation Of The Valve Rocker Arm Group{1102,1112,1121,1123,1208,1209}

1999/05/01 New Gaskets And Ignition Body Assembly Used In Prechamber Groups To Improve Sealing{1106}

1999/05/01 Do Not Reuse Connecting Rod Nuts On G3600 Engines{1218}

1999/05/01 New Rod End Used In Hydrax Fuel Control Groups To Reduce Linkage Wear{1250}

1999/05/01 New Gasket And Plate Improve Sealing And Assembly Of Rear Housing And Fuel Bracket{1300}