69D and 769D Off-Highway Truck and 771D Quarry Truck Hydraulic System Caterpillar

Illustration 1	g00532419

Proper installation of the body support pads will effectively balance the load weight. This will reduce the risk of possible damage to the chassis. If the body support pads indicate uneven wear, readjusting the shims may correct the problem. Also, if the paint on the frame indicates uneven wear, readjusting the shims may correct the problem.

Procedure To Install Pad Assemblies To The Main Frame

Illustration 2	g00103090
View B (1) Pad assembly (2) Shim

Note: The truck should be on a level surface. The pivot pin for the truck body should be installed. The hoist cylinders should be installed.

1. Mark the location of pad assemblies (1) on the frame rail using the center mounting block on the dump body as a guide.

2. Raise the dump body and install the proper safety device in order to secure the dump body in the RAISE position. Stack one pad assembly (1) and one shim (2) at each location for a pad assembly (1) on the frame rail.

3. Remove the safety device and lower the dump body. Locate any gaps and add shims (2) in order to close the gaps.

4. Raise the dump body and install the proper safety device in order to secure the dump body in the RAISE position. Bolt pad assemblies (1) and the shim packs to the dump body. Remove the safety device and lower the dump body.

Procedure To Install Pad Assemblies To The Top Of The Main Crossbeam

Illustration 3	g00515316
View A-A (1) Pad assembly (2) Shim (3) Shoe

Note: The truck should be on a level surface. The pivot pin for the truck body should be installed. The hoist cylinders should be installed.

1. Place a pad assembly (1) on each shoe (3) at the front of the dump body. Install as many shims (2) as possible between pad assembly (1) and shoe (3). Remove pad assembly (1) and the shim pack. Add one shim (2) to each shim pack.

2. Raise the dump body and install the proper safety device in order to secure the dump body in the RAISE position. Bolt pad assemblies (1) and the shim packs to shoes (3). Remove the safety device and lower the dump body. No gaps should be visible between pad assemblies (1) and the dump body.