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Home >> Triumph >> 1971 >> Spitfire Not Available Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Brakes - GIRLING >> Overhaul >> Vacuum Servo (Booster) Unit >> Disassembly (Servo Unit Components)

Disassembly (Servo Unit Components)

  1. Remove servo unit as previously outlined. To remove check valve, note angle of valve in relation to servo housing. Use a suitable wrench, press down on valve and turn counterclockwise 1/3 turn.
  2. Remove filter by pulling back dust cover and pulling out filter. For ease of filter installation, cut new filter diagonally.
  3. Remove seal and plate assembly from front shell recess by gripping center rib with needle nose pliers. Use grease supplied in service kit to lubricate new seal and plate assembly when installing.
  4. To check push rod for wear, place a straight edge across front shell recess. Measure clearance 0.011 - 0.016" (0.28 - 0.41 mm), between end of push rod and straight edge. Replace servo unit if clearance is incorrect.
    NOTE: Servo push rod-to-master cylinder clearance is set by factory and secured with Locktite. No attempt should be made to alter setting.
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