Hydraulic Fluid Accumulator: Service and Repair

WARNING: 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 inch diameter hole through the end of the accumulator can, opposite the O-ring.

WARNING: 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.
NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application General Motors will call out those fasteners that require a replacement after removal General Motors will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, grease or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these Instructions can help you avoid damage to parts and systems.

^ Tool Required: J 26889 Accumulator Piston Compressor or equivalent

Hydraulic Booster Assembly:

Hydraulic Booster Assembly (Part 2 Of 2):

Remove or Disconnect

Removing The Accumulator:

1. Place J 26889 over end of accumulator and install nuts on stud.
2. Depress accumulator with a C-clamp.
3. Accumulator retainer ring (43).
4. Release C-clamp.
5. Nut from stud
6. Remove tool (J 26889).
7. Accumulator (44) and O-ring seal.

Install or Connect

NOTE: Lubricate all seals and metal friction points with power steering fluid.

1. Accumulator (44) and O-ring seal.
2. Place J 26889 over end of accumulator and install nuts on stud.
3. Depress accumulator with a C-clamp.
4. Accumulator retainer ring (43).
5. Release C-clamp.
6. Nut from stud.
7. Remove tool (J 26889).