Brake Booster - BENDIX Hydro-Boost: Disassembly

1. Secure unit in vise. DO NOT  clamp accumulator. Place "C" clamp and Accumulator Cap Retainer (J-26889) over end of accumulator and install nut onto master cylinder mounting stud. See Fig 1.
   Fig 1: Compressing Accumulator

   Courtesy of GENERAL MOTORS CORP.
2. Depress accumulator with clamp. Insert punch into hole on housing. Release clamp and remove cap retainer.
3. Remove the following: accumulator, "O" ring, retainer, spool plug, "O" ring, spool return spring, spring and baffle retainer, output pushrod, baffle, and piston return spring.
4. Saw off eyelet of pedal rod. Remove the following: pedal rod boot, bracket nut, bracket and housing cover bolts.
5. Separate cover from housing. Remove the following: housing seal, piston assembly, spool valve and accumulator valve. See Fig 2.

Fig 2: Using Fabricated Tool to Remove Accumulator Valves

Courtesy of GENERAL MOTORS CORP.

Fig 3: Exploded View of Bendix Hydro-Boost Assembly Components

Courtesy of GENERAL MOTORS CORP.