GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 TopKick C-Series Commercial (Cutaway) C4/C5 🢒 Brakes 🢒 Air Brakes 🢒 Automatic Air Brake Reservoir Drain Valve Replacement

Removal Procedure
  1. Apply the parking brake.
  2. Block the wheels
  3. Drain all the reservoirs. Refer to Draining Reservoirs .

    4. Object Number: 201688 Size: SH
  4. Remove the reservoir drain valve.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 201688 Size: SH
  1. Install the reservoir drain valve, automatic type.

    2. Tighten
    Tighten the reservoir drain valve to 68 N·m (50 lb ft).

  2. Start the engine.
  3. Charge the system air to the governor cut-out pressure.
  4. Check for leaks with a soap and water solution around the reservoir drain valve.
  5. Leakage is not permissible.
  6. Remove the wheel blocks.