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Hydraulic Brake Booster: Disassembly

  1. Place brake booster in vise. Remove reservoir cap. Remove 3 set screws, and pull out reservoir. Remove 3 grommets. Remove cylinder boot. Using 30 mm deep socket wrench, remove oil pressure sensor, spacer and "O" ring.
  2. Pressing piston in with screwdriver, use pin to push snap ring from the hole in body, then remove it. Remove No. 1 and No. 2 piston, pulling straight out, not at an angle. Disconnect actuator hose. Remove 3 bolts, 2 hangers and clamp.
  3. Remove brake actuator tube No. 1. Remove 2 screws and disconnect accumulator coil lead wire from booster assembly. Using 5 mm socket hexagon wrench, remove 3 bolts, No. 1 and No. 2 accumulator brackets, booster pump and accumulator with No. 1 pump bracket. Remove bolt and No. 1 pump bracket. Remove 2 washers, 3 cushions, 2 collars and sleeve. Remove 2 bolts and No. 2 pump bracket.
  4. Place cloth around booster and place booster pump in vise. Using Remover (09318-12010), remove accumulator. Remove silencer tube. Remove spring and "O" ring. Ensure no foreign matter enters pump.
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