1996/12/23 Caterpillar

Larger Washer Used With Tube Clamps On Hydrostatic Transmission Prevents Clamp From Loosening{3218}

Usage:

943 (03Y, 31Y, 04Z, 19Z),
953 (2RB, 1XK, 76Y, 77Y, 78Y, 05Z, 20Z, 44Z),
953B (7KL, 5MK),
963 (29S, 06Z, 11Z, 18Z, 21Z, 48Z),
963B (9BL),
973 (66G, 86G, 90L, 91L, 32Z) Track Loaders

Description of Change: A larger diameter washer is used with the steel tube clamps at the top of the hydrostatic transmission (HPCU). The larger washers extend across the elongated holes in the clamp. This stops the nut from being drawn into the elongated hole as the nut is tightened, preventing the clamp from loosening.

Adaptable To: The new larger diameter 5P-1075 Washer-Hard replaces the smaller diameter 9M-1974 Washer-Hard used with the steel tube clamps in 3G-0368, 3G-5011, and 3G-5973 Lines Groups-Hydrostatic.

The 5P-1075 Washer-Hard is effective with the following models and hydrostatic transmissions identified with HPCU (Serial Numbers): 953B HPCU (4NA8458), 963B HPCU (8EX1117) Track Loaders, and 973 HPCU (8CA2509, 8EA368) Track Loaders. Earlier hydrostatic transmissions for these models, and hydrostatic transmissions for all 943, 953, 963 Track Loaders are adaptable.

Typical lines group. (1) 5P-1075 Washer-Hard.

Caterpillar Information System:

1996/12/23 Externally Adjusted Relief Valve Used In Steering Control Valve Group{4307,4322}

1996/12/23 Cab Heater Efficiency Improved{7304}

1996/12/23 Grapple Rotator Motor Joint Strengthened{5082,6307}

1996/12/23 Rear Axle Oil Level Raised To Improve Axle Lubrication{3013}

1996/12/23 Service Procedures For Special Application Rollers And Idlers Summarized For Track-Type Troctors{4159,4180}

1996/12/23 Longer Bosses Increase Blade Assembly Service Life{5057,6060,6051,6071,7167}

1996/12/16 Improved Fuel Sender Assembly Available {7481}

1996/12/16 Cab Air Conditioner Group Improvements Eliminate Debris {7320}

1996/12/16 Longer Tie Rods For Control Valve Groups {5051,5124}

1996/12/16 Cab Improvements Reduce Vibration {7266}

1996/12/16 Spring Force Adjustment Allows Hydraulic Levers To Remain In Detent Position {5051}

1996/12/16 Sprocket Segments Can Be Reworked To Allow Proper Torque {4155}

1996/12/23 New Temperature Sensors Used Which Prevent False Over Temperature Warnings{1906,1400}

1996/12/23 Ride Control Accumulator Recharging Procedure Changed{5081,5077}

1996/12/23 New Sight Gauge Replaces Former Dip Stick For Improved Visibility Of The Front Implement Hydraulic Tank Oil Level{7479}

1996/12/23 New Rotocoil Assembly Used In Engine Cylinder Head Groups{1109}

1996/12/30 Wiring Harness Routing Changed To Increase Wire Harness Service Life {1408}

1996/12/30 Improved Clapper Spring Available For Pilot Valve Groups {5059,5125,5126}

1996/12/30 Supplement To Service Manual Module; "Differential Lock-Relief Valve Pressure Check" {3264}

1996/12/30 Service Brake Adjustment Procedure Improves Application Pressure And Performance {4251,4269}

1996/12/30 Systems Operation Testing & Adjusting, 966F & 966F Series II Wheel Loader Air System And Brakes, Service Manual Module Available {0374,4250}

1996/12/30 New Hose Assemblies Are Compatible With The Extended Life Coolant (ELC) And Provide Increased Service Life {1380,1395}

1996/12/30 New Thumb Screw Improves The Ability To Secure The Air Filter Grate To The Cover Assembly {7301,7308,7251}

1996/12/30 Shaft Nut Torque Reduced To Prevent Actuator Valve Seizure {3200}