GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Brakes 🢒 Air Brakes 🢒 Reservoir Replacement - Front Axle

Removal Procedure
  1. Apply the parking brake.
  2. Block the wheels.
  3. Drain all the reservoirs. Refer to Air Brake Reservoir Draining.
  4. Remove the air lines. Refer to Hose and Line Replacement - Nylon Push-In Type Fitting.

    5. Object Number: 1486983 Size: SH
  5. Remove the reservoir support strap nuts.
  6. Remove the reservoir support straps from the reservoir supports.

    7. Object Number: 1486957 Size: SH
  7. Remove the reservoir.
  8. Clean the air lines and the fittings with a dry cloth.
  9. Clean the inside reservoir with steam or hot water.
  10. Inspect the air lines for the following conditions:
    11. • Damage
    •  Cracks
    • Bulges
    • Wear
      If any of these conditions are present, replace the air lines.
  11. Inspect the reservoir for corrosion or damage.
  12. Replace the reservoir if the reservoir is weakened.
  13. Inspect the reservoir supports and straps for damage.
  14. Replace the supports and the straps, as needed.

Installation Procedure

    Object Number: 1486957 Size: SH
  1. Install the reservoir.
  2. Install the reservoir support straps to the reservoir supports.

    3. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1486983 Size: SH
  3. Install the reservoir support strap nuts.

    4. Tighten
    Tighten the front axle service reservoir support strap nuts to 13 N·m (10 lb ft).

  4. Install the air lines. Refer to Hose and Line Replacement - Nylon Push-In Type Fitting.
  5. Start the engine.
  6. Charge the system air pressure to the governor cut-out point.
  7. Stop the engine.
  8. Inspect for leaks with a soap solution. Leakage is not permissible.
  9. Inspect for the proper brake operation.
  10. Remove the wheel blocks.