1993/05/10 Caterpillar

New Low Crevice Volume (LCV) Piston Body Assembly Used{1214}

Usage:

G3508 (2JF),
G3512 (4KC),
G3516 (3RC) Engines

Description of Change: A new piston body assembly is used. The rings have been moved closer to the top of the new piston assembly when compared to the former piston assembly. The reduces the crevice volume (the volume between the cylinder and the piston from the top of the top ring to the top of the piston). The lower crevice volume will result in more complete burning of all the fuel-air mixture in the cylinder. This will result in lower carbon monoxide and hydrocarbon elisions.

Adaptable To: The new 6I4609 Piston Body Assembly is a direct replacement for the former 7E7940 Piston Body Assembly which is canceled. The new piston body assembly is effective with G3508 (2JF213) Engine, G3512 (4KC320) Engine, and G3516 (3RC576) Engine. The new 6I4609 Piston Body Assembly uses the same rings as the former piston. They are the 7E7581 (Top) Ring, 8N1234 (Intermediate) Ring, and the 7W2221 (Oil) Ring.

Caterpillar Information System:

1993/05/10 0R3735 Remanufactured Camshaft Available{1210}

1993/05/10 Service Tips For Effective Repair Of Failed Turbochargers{1052,1063,1059}

1993/05/03 Governor Control Adjustment {1264}

1993/04/12 New Bearing Assemblies Used On Main Shaft{3322}

1993/04/12 New Damper Guard Group Used{7150}

1993/04/12 New Expansion Tank Assembly Used In Expansion Tank Groups{1354}

1993/04/12 Adjustment Of 60670 Idle Air Lines Group (Idle Bleed Circuit){1266}

1993/04/12 New Seal Group Used In Water Pump Groups{1361}

1993/04/12 Fan Drive Pulley Group Components{1359}

1993/04/12 New Personality Modules Provide Improved Cruise Control{1902}

1993/04/12 Component Cross Reference Lists For Programed Electronic Engine Control (PEEC) And Electronic Systems{1900}

1993/04/12 7L4095 Exhaust Manifold Available For Parts Service{1059}

1993/05/17 Baffles Available To Help Reduce Turbocharger Noise {1052,1058}

1993/05/17 New Fuel Injection Lines, Clamps, And Brackets Used In Fuel Injection Lines Groups {1252}

1993/05/24 Summary Of Changes To Timing Advance Drive Groups{1272}

1993/05/31 New Fuel Injector Group Help Reduce Plunger And Barrel Seizures{1290}

1993/06/07 New Jacket Water Heater Mounting Groups Include Improved Hoses{1383}

1993/06/07 New Electronic Speed Switch Assembly Used In Junction Box Groups Increases Service Life{1900}

1993/06/14 Low Idle Adjustment, Additional "Buffer" Adjustment Screw Used On Marine Governors {1264}

1993/06/14 Lock Removed From Front Timing Gear Group To Help Prevent Loss Of Tightening Torque {1206}

1993/06/14 New Fuel Pump Drive Idler Gear Assembly And Shaft Used In Front Timing Gear Groups {1206}

1993/06/14 New Bonnet Used In Fuel Injection Pump Group {1251}

1993/06/14 3E3761 Coolant Level Sensor Assembly {7422}

1993/06/21 Windshield Washer Jet Nozzle Assembly Available For Parts Service{7306}