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Home >> Pontiac >> 1971 >> GTO Base, 7.5L Eng, Eng CD WC, Not Available Trans >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Power Brake Units - DELCO-Moraine Tandem Diaphragm >> Overhaul >> Disassembly (Power Cylinder)

Disassembly (Power Cylinder)

  1. - Scribe mark housing for reassembly. Remove master cylinder, if not done during removal. Attach front housing to suitable holding fixture (J-22805). Separate housings, using suitable spanner wrench (J-9504).
    NOTE: On tilt bracket mounting, use spanner wrench with suitable adaptor (J-22893).

    Press down and turn counterclockwise.

    CAUTION: Separate slowly, as unit is under internal spring pressure. Ensure no pressure is put on plastic power piston.
  2. Remove power piston return spring (retainer plate may come out with spring). If defective, remove check valve and grommet. Remove front housing seal. If equipped, remove push rod clevis and lock nut, from rear housing. Remove boot, felt silencer, power piston group, and seal from center of rear housing.
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