GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2002 🢒 Isuzu T-Series (Truck Line C) 🢒 Brakes 🢒 Air Brakes 🢒 Reservoir Check Valve Leakage Test
  1. Apply the parking brake and block the vehicle wheels.
  2. Start the engine and charge the system to the air compressor governor check-out point.
  3. Turn off the engine.
  4. Drain the air pressure from the supply reservoir. Refer to Draining Reservoirs .

    5. Object Number: 227883 Size: SH
  5. Disconnect the air line on the supply side of the single check valve.
  6. Inspect the single check valve for any air leakage. The air leakage must not exceed a 25.4 mm (1 in) bubble in 5 seconds.

    7. If the leakage is excessive, overhaul or replace the single check valve.

  7. Connect the supply port air line.
  8. Start the engine and charge the air system to the governor cut-out point.
  9. Connect the supply port air line.
  10. Start the engine and charge the air system to the governor cut-out point.
  11. Stop the engine.
  12. Check the brake operation.
  13. Remove the wheel blocks.