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Home >> Isuzu >> 1985 >> I-Mark 4D Hatchback, Automatic >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc & Drum >> Adjustments >> Power Brake Piston Rod

Power Brake Piston Rod

  1. Clearance between master cylinder primary piston and power brake piston rod must be .004-.020" (.1-.5 mm), with engine idling and vacuum applied to power brake unit.
  2. Remove master cylinder and power brake unit from vehicle. Install Piston Rod Gauge (J 34873) on master cylinder and push pin until it contacts piston.
  3. Remove gauge, turn upside down and place on power brake unit. Adjust power brake piston rod until end contacts gauge pin head.
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