Hydraulic Brake Booster Accumulator: Removal
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
The accumulator contains compressed gas. Always use the proper tools and follow the recommended procedures or personal injury may result. Do not apply heat to accumulator. Do not attempt to repair an inoperative accumulator. Always replace an inoperative accumulator with a new one. Dispose of an inoperative accumulator by drilling a 1/16" (1.5 mm) diameter hole through the end of the accumulator can, opposite the O-ring.
CAUTION:
Push rod removal is not recommended. Improper staking of the push rod to the Hydro-boost reaction piston can result in a loss of brakes. If the rod or seals require service, the entire unit must be replaced.
NOTE:
Required Tools: Accumulator Piston Compressor (J-26889).
- Depress brake pedal at least ten times to relieve pressure in the accumulator. Damage to the brake lines can occur if the master cylinder is not supported. Remove the master cylinder from the hydraulic booster.
- Place the Accumulator Piston Compressor over the end of the accumulator. See Fig 1 . Install the nut on the stud. Depress the accumulator with a C-clamp. If accumulator doesn't move with moderate pressure, remove the C-clamp and depress brake pedal ten times to relieve pressure in the accumulator.
- Rotate retaining ring until either end of the ring is under the access hole. See Fig 2 . Depress and hold the retaining ring with a small tool inserted into the access hole.
- Remove the accumulator retainer ring using a small hook shaped tool. See Fig 3 . Release the C-clamp. Remove the nut from the stud. Remove the Accumulator Piston Compressor. Remove the accumulator and O-ring seal. See Fig 3 .