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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brake System & Drum Brake System - RWD Trucks >> Adjustments >> Drum Brake Shoe - Conventional Design

Drum Brake Shoe - Conventional Design

  1. Knock out lanced area in brake drum with a punch. If drum is installed, it must be removed and all metal removed from brake area.
  2. Turn adjusting screw, through hole, until brake shoes expand and brake drums can just be turned by hand. The drag should be equal at all wheels.
  3. Back off adjusting screw 30 notches at each wheel. If drum still drags, back off an additional 1 or 2 notches. Install hole cover in drum.
Fig 1: Exploded View of Single Anchor Brake Assembly
G30399Courtesy of GENERAL MOTORS CORP.