1999/02/08 Caterpillar


Valve Bodies Now Stress Relieved To Improve Service Life {3167}

Usage:


120H (4MK, 2AN, 9YR, 6NM, 6TM, 5FM, 9FN, 3GR),
135H (3YK, 8WN, 7MM),
12H (4XM, 8MN, 2WR, 5ZM, 4ER, 2LR, 2GS),
140H (2ZK, 9TN, 9ZN, 3FR, 8JM, 5HM, 8KM, 3AS),
143H (1AL),
160H (9EJ, 3GM, 3HR, 9JM, 2FM, 6WM, 2HS),
163 (5AK) Motor Graders;
446 (6XF),
446B (5BL) Backhoe Loaders;
515 (4LR),
525 (1DN) Skidders;
IT12B (1KF),
IT12F (1KF),
IT14B (3NJ),
IT18F (5EJ, 6ZF),
IT24F (4N, 6KN),
IT28F (3CL, 1JL),
IT28G (8CR, 9AR),
IT38F (5DR, 6FN),
IT38G (1CW, 7BS) Integrated Toolcarriers;
910E (1YK),
910F (1SF),
918F (2CK, 3TJ, 5DR),
924F (4YN, 5NN, 6MN, 7PN),
928F (2XL, 7YM, 8AK),
928G (6XR, 7SR),
938F (1KM, 2RM, 7SN, 8YN),
938G (4YS, 6WS, 8RS, 9HS) Wheel Loaders

Description of Change: The aluminum valve body used in the transmission selector and pressure control valve groups is now stress relieved. This improves the dimensional stability for the finished control body and prevents valve spool sticking when subjected to high temperatures.

Adaptable To: The part numbers of the valve did not change, and are listed in Chart 1. The new bodies can be used on earlier machines. The effective transmission serial numbers are listed in Chart 2.

Caterpillar Information System:

1999/02/08 C-Series Backhoe Loaders Are Being Updated {1000,5077,6501,6504}
1999/02/08 New Inching Modulation Valve And Cable Prevents Oil Leakage {3162,3167}
1999/02/08 Acceptable Welding And Drilling Locations On ROPS Cab {7325}
1999/02/08 New Brake Air Pressure Switch Has Increased Service Life {1432}
1999/02/01 Procedure For Assembly And Installation Of Conventional Duo-Cone Seals Is Now Available{7561}
1999/02/01 New Pulse Width Modulated Brake Sensor Now Available{4800}
1999/02/01 New Asphalt Deflector Kit{6630,6631}
1999/02/01 Procedure For Propel Pump Neutral Adjustment For AP-1055B/BG-2455C{3108}
1999/02/01 Procedure For Propel Pump Neutral Adjustment For Rubber Tire And Steel Track Asphalt Pavers{3108}
1999/02/01 New Service Information Available For Forest Products{0374,0375}
1999/02/01 Bearing Specifications For 3408E And 3412E Hydraulically Actuated Electronically Controlled Unit Injector (HEUI) Hydraulic Drive Group{1714}
1999/02/01 New Welding Procedure For Fuel And Hydraulic Tank Mounts For Certain Off-Highway Trucks{7050}
1999/02/08 New Engine Pressure Sensors Available {1916,1917,1922,1923,1924}
1999/02/08 Supplemental Steering Self Test Changed On New D-Series Trucks {4323,4343}
1999/02/08 New Valves Improve Harvester Head Service Life {0587}
1999/02/08 New Feeder Control Group Available for Certain Paver Models {5643}
1999/02/08 New Battery Increases Starting Power {1401}
1999/02/08 Supports On Accelerated Pre-Separation Group Are Now Serviced {6934}
1999/02/08 Correct Seal Usage Improves Service Life {7555}
1999/02/08 New VIMS Application Guide Available {7601,0374}
1999/02/15 Spacers Now Used On 1R-1210 Midwheels {4192,4150}
1999/02/15 Special Instruction, REHS0151-01, Available For Procedure For Reinforcing And Bolting On Guide Blocks {4198}
1999/02/15 Supplement To Correct Seal Ring Positioning {3159,7555}
1999/02/15 New Right Side Platform Design Will Reduce Cracking Between Platform And Cowling {7253}
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