Shut off the engine.
Open the drain cock on the wet tank to release air from the system. Close the draincock after the pressure is released.
Operate the engine to activate the air compressor.
With the air compressor pumping between 550 to 690 kPa [80 to 100 psi], use a solution of soapy water to check for
air leaks in the following areas:
• Unloader cover gasket
• Unloader pin o-ring
• Air compressor head gasket
If air leaks are found, refer to Procedure 4-02 for repair of these components.
