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Brake Booster - BENDIX Single Diaphragm: Disassembly

  1. Disconnect master cylinder from power unit and power unit from vehicle. Scribe power unit housings for reassembly reference. Remove front housing seal and piston rod.
  2. Attach power unit front housing to holding fixture base (J-22805) and clamp base in vise with power section up. Remove lock nut and push rod clevis. Remove rear housing mounting bracket. Remove dust boot retainer, boot, silencer and air filter.
  3. Partially straighten the 4 deepest tabs on rear housing. Place a spanner wrench (J-9504) onto studs of rear housing. Press down and turn rear housing clockwise to separate 2 housings. Carefully remove rear housing.
    CAUTION: Housings are under internal spring pressure.
  4. Remove air filter from plate extension. Remove diaphragm from plate. Do not damage diaphragm or plate. Hold diaphragm plate so push rod is horizontal. Depress and rotate rod until air valve lock falls out. Remove reaction disc.
    CAUTION: Remove seal only if new one is available. Do not reuse old seal once it has been removed.
  5. Remove rear housing bearing seal. Remove vacuum check valve and grommet. Remove front housing and holding fixture from vise and remove front housing.
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