Tools Required

J 26889 Accumulator Piston Compressor

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 1.5 mm (1/16 in) 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 Hydroboost reaction piston can result in a loss of brakes. If the rod or seals require service, the entire unit must be replaced.

1. Depress brake pedal at least ten times to relieve pressure in the accumulator.




Important: After the next step, remember to support the master cylinder.

2. Damage to the brake lines can occur if the master cylinder is not supported.
3. Remove the master cylinder from the hydraulic booster.



4. Place the J 26889 over the end of the accumulator.
5. Install the nut on the stud.
6. 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.



7. Rotate retaining ring (2) until either end of the ring is under the access hole (1).
8. Depress and hold the retaining ring (2) with a small tool inserted into the access hole (1).



9. Remove the accumulator retainer ring (1) using a small hook shaped tool.



10. Release the C-clamp.
11. Remove the nut from the stud.
12. Remove the J 26889 .



13. Remove the accumulator (2) and O-ring seal (3).

1. Lubricate all seals and metal friction points with power steering fluid GM P/N 1052884.
2. Install the accumulator (2) and O-ring seal (3).



3. Place the J 26889 over the end of the accumulator.
4. Install the nut on the stud.
5. Depress the accumulator with a C-clamp.



6. Install the accumulator retainer ring (1).



7. Release the C-clamp.
8. Remove the nut from the stud.
9. Remove the J 26889 .



10. Install the master cylinder to the hydraulic booster.