LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1981 >> Forward Control 4.8L Eng VIN T, Standard Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Power Brake Units - DELCO-Moraine Tandem Diaphragm >> Piston Rod Adjustment

Piston Rod Adjustment

NOTE: This adjustment applies to Chevrolet and GMC only. Jeep push rod is not adjustable.
  1. Place power unit in padded vise with front housing up. Do not clamp tight. Insert master cylinder piston rod, flat end first, into piston rod retainer. Ensure rod is properly seated. Remove front housing seal to assure no vacuum is in unit.
  2. Place suitable gauge (J-22647) over piston rod, in a position which will allow gauge to be moved right or left without contacting studs. Piston rod should contact longer section of gauge. Rod is non-adjustable, and if out of limits, must be replaced with adjustable service rod. With service rod, adjust self-locking screw to meet gauging specifications.
    Fig 1: Gauging Push Rod With Special Gauge (Chevrolet & GMC Models Only)
    G09354071Courtesy of NOT AVAILABLE
scientia non olet · About LEMON Manuals