Front Axle Reservoir Air Supply Valve Leakage Test for Chevrolet Chevrolet C-Series Medium Duty Truck B7 1998

1. Start the engine.
2. Charge the system air pressure to the governor cut-out point.



3. Apply a soap solution to cover the valve.
4. Verify that no leakage occurs. If bubbles appear, install the valve core finger tightly.
5. Check for leaks. If air leakage is still present, replace the valve.