VALVE GP-CONTROL 3893099 - Caterpillar

To prevent personal injury or death, do not work under the truck with the body (bed) raised.When it is necessary to work under the truck with the body (bed) raised, install the body (bed) retaining pins through the pin holes in the frame and body.
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Raise the body until the retaining eyes on the body align with the retaining eyes on the frame. Install the two body retaining pins.
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Clean the body support pads with high pressure water or steam. If damage is found, consult your Caterpillar dealer for specific repair procedures.
Visually inspect each of the body support pads. There should be no gaps between the body support pads and the mating surfaces when the body is lowered. Compare all the body support pads. If the inspection indicates uneven wear of the body support pads, you may need to readjust the shims. Also, if the paint on the frame indicates uneven wear, you may need to readjust the shims. See the Hydraulic System Testing and Adjusting, "Pad (Dump Body) -Install and Adjust" for the procedure. If the body support pads are shimmed correctly, review your loading operation.Note: 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.