1996/12/23 Caterpillar

Grapple Rotator Motor Joint Strengthened{5082,6307}

Usage:

515 (4LR),
525 (1DN) Wheel Skidders

Description of Change: The integrity of the bolted joint for the grapple rotator motor has been improved. Longer bolts are used along with hardened washers. In addition to the bolt change, the motor flange is spotfaced.

Adaptable To: The improved grapple rotator motor bolted joint is effective with 515 (4LR354) and 525 (1DN1010) Wheel Skidders. This change is also adaptable to first production for the machines listed by using the following procedure.

Procedure for Spot Facing Grapple Rotator Motor Flange

1. Spotface grapple rotator motor flange (1), in four places (3).

2. Use a 29.54 mm (1.163 in) diameter spotface (A). Machine the flange to a thickness of 15.11 mm (.595 in).

3. Replace the former 8T-4139 Bolts (not canceled), with four longer 8T-4956 Bolts (2) and 8T-4223 Hard Washers.

4. Tighten the 8T-4956 Bolts to a torque of 88.5 N·m (65 lb ft).

Illustration 1. Grapple Rotate Motor (1) Motor flange. (2) 8T-4956 Bolt.

Illustration 2. (A) Spotface diameter. (1) Motor flange. (3) Spotface location.

Caterpillar Information System:

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}

1996/12/16 Speed And Direction Lever Improvements Prevent Seizing {1901}

1996/12/16 Improved Design Of Decking Blade And Trunnion Caps Provide Increased Service Life {6060,6069}

1996/12/16 Improved Relay Switch Assembly Used To Provide Increased Reliability {1423}

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

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

1996/12/23 Larger Washer Used With Tube Clamps On Hydrostatic Transmission Prevents Clamp From Loosening{3218}

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}