768C & 769C TRACTOR & 769C TRUCK VEHICLE SYSTEMS Caterpillar

START BY:

a. remove cab rear cover

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To prevent possible personal injury, do not disconnect any air lines or remove any valves until all the pressure has been released from the air system.

NOTE: Air system check valves are located at position (X). The air system relief valve is located at position (Y). There is also a relief valve located on the wet tank (not shown).

1. Open air tank drain valves on the right side of cab to release all air pressure.

2. Disconnect the hose from the check valve. Remove the check valve, or remove the relief valve from the air reservoir.

3. Install the relief valve, or install the check valve in the air reservoir. Connect the hose to the valve.

END BY:

a. install cab rear cover