Front Air Brake Limit Valve Leakage Test for Isuzu Isuzu MD Steel Tilt (F Model) 2000

1. Block the wheels.
2. Apply the parking brake.
3. Start the engine.
4. Charge the system air pressure to the governor cut-out point.
5. Have an assistant apply the brake pedal.
6. Apply a soap solution to the exhaust port and around the seam between the cover and the body.



7. Check that no bubbles appear around the seam.
8. Repair or replace the valve (4) if bubbles appear. Refer to Front Air Brake Limit Valve Replacement .
9. Check that the exhaust port leakage is less than a 25 mm (1 in) bubble in 5 seconds.
10. Repair or replace the valve (4) if the leakage exceeds this amount. Refer to Air Brake Application Valve Replacement .
11. Remove the wheel blocks.