1999/05/01 Caterpillar

New Block Cover Used{1201}

Usage:

3408B (8RG403-Up),
3412 (3JK1534-Up, 7BL194-Up),
3412E (9KS279-Up) Marine Engines;
3408C (1TS496-Up),
3412C (9BR601-Up) Marine Auxiliary Engines;
3408B (67U17987-Up, 9TD616-Up),
3408C (9ER684-Up),
3408E (7PR632-Up),
3412 (38S1968333-Up, 9XF172-Up),
3412C (8AR810-Up),
3412E (4CR10160-Up) Industrial Engines;
3408B (2BG647-Up, 78Z5896-Up),
3412 (81Z23716-Up) Generator Set Engines

Description of Change: A new cover, seal, and bolts are now used on the above engines. The new cover and seal are more resistant to oil leakage. The new cover assembly includes an O-ring groove in the cover and an O-ring that will provide a better leak free joint between the block and cover.

Adaptable To: The new 2S-9750 Cover and the new 5P-4268 Seal are a direct replacement for the former 2P-2772 Cover and 4N-0933 Gasket that is located on the left-hand, forward side of the engine block. This new cover and assembly also requires two new 0S-1594 Bolts which replace the former 1A-2029 Bolts. The former 5M-2894 Washers can be reused. These changes are in 6I-2956, 4N-6866, and 4N-1960 Cover Groups (Central).

(FRONT, LEFT-HAND SIDE OF BLOCK) Front of block (A).

New cover (1).

Seal (2).

Bolts (3)

NOTE: This new cover, seal, and bolts should only be used in the location shown in the above illustration to replace the old cover located on the left-hand, forward side of the engine.

Caterpillar Information System:

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}

1999/04/01 Improved Data Logger Feature For Customer Communication Module{1926}

1999/04/01 New 155-5175 AC Current Probe For Generator Sets Now Available{1400,4450}

1999/04/01 Protection From Paint Is Required For The G3600 Hydraulic Actuator (Hydrax) Shaft{1909,7581}

1999/04/01 New Cover And Plate Assembly Used In Oil Level Contactor Groups To Help Resist Vibration Damage{1326,7450}

1999/04/01 Heinzmann Wastegate Actuator Relocated{1057}

1999/04/01 Using The Correct Diode When Using The Customer Communication Module In Multiple Engine Applications{1902,0374}

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

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

1999/05/01 New Breakout Harness{1559}

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

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

1999/05/01 New Flywheel Housing Assembly Available{1157}

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}