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Home >> Oldsmobile >> 1996 >> Ninety-Eight >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Adjustments >> Power Brake Booster Piston Rod
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Power Brake Booster Piston Rod

NOTE: Use the following procedure to measure how far booster piston rod protrudes from booster when vacuum is applied to booster. Piston rod is not adjustable. If piston rod protrusion is out of limits, replace power brake booster.
  1. Booster does not have to be installed to perform procedure. Apply 25 in. Hg vacuum or MAXIMUM available engine vacuum to booster. Position Piston Rod Gauge (J-37839) over piston rod.
  2. One side of gauge measures minimum rod length. Other side measures maximum rod length. If piston rod length does not fall between maximum and minimum dimensions, replace brake power booster.
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