GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2002 🢒 Isuzu T-Series (Truck Line C) 🢒 Brakes 🢒 Air Brakes 🢒 Air Brake Quick Release Valve Leakage Test
  1. Block the vehicle wheels.
  2. Start the engine.
  3. Charge the system air pressure to the governor cut-out point.
  4. Stop the engine.
  5. Have an assistant apply the brake pedal.

    6. Object Number: 202286 Size: SH
  6. Inspect the exhaust port for any air leakage. The air leakage should be less than a 25.4 mm (3 inch) bubble in three seconds. If the air leakage is excessive, overhaul or replace the quick release valve.
  7. Inspect the upper and lower valve body for any air leakage. If any bubbles appear, overhaul or replace the quick release valve.
  8. Remove the wheel blocks.