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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 >> Removal & Installation >> Disc Calipers & Pads - DELCO Floating Caliper >> Installation

Disc Calipers & Pads - DELCO Floating Caliper: Installation

  1. Lubricate mounting bolt bushings and bolt seals with silicone grease. Install bushings and seals in mounting bolt holes. Install bolt boots in caliper housing. Fill cavities between mounting bolt bushings with silicone grease.
  2. Install inboard pad and snap retainer spring into caliper piston. Ensure that shoe is flush against piston. Install outboard pad with wear at leading edge of shoe with forward wheel rotation. Ensure that shoe is flat against caliper housing and shoe retainer spring buttons are seated in notches.
  3. Install caliper over rotor and install mounting bolts and sleeves. Torque mounting bolts to 28 ft. lbs. (38 N.m). Ensure that bolt boots stay seated after tightening bolts.
  4. Measure clearance between caliper and the bracket stops. If necessary, remove caliper and file ends of bracket stops to obtain proper clearance. See Fig 1.
    Fig 1: Measuring Caliper To Mounting Bracket Clearance
    G200086Courtesy of GENERAL MOTORS CORP.
  5. Install brake hose (if removed) with new gaskets and tighten inlet fitting to 32 ft. lbs. (43 N.m). Fill master cylinder to proper level and bleed brake system if necessary.


  1. Install new rubber bushings in 4 caliper ears. Install sleeves in bushings with installer tool (J-22835). Position sleeves so that end toward disc pad is flush with machined surface of ear.
  2. Install shoe support spring on inner disc pad. Place single tang end of spring over notch in center edge of pad. Now press 2 tangs at spring end of inner disc pad over bottom edge of pad.
  3. Place inner disc pad in caliper (with spring attached) so that the ear end of disc pad is down and the bottom end is up. Install at an angle so that the spring rests on the inside diameter of piston.
  4. Press down on both ends of disc pad until pad is in a flat position, resting on piston. Be sure to install inner brake pads on the correct side. Wear sensor will be toward the rear of the caliper when correctly installed.
  5. Place outer disc pad in caliper with ears of pad over caliper ears. Tab at bottom of pad should be engaged in caliper cut-out. Note left and right disc pads. Place caliper over rotor, line up caliper ears with holes in the mounting bracket.
  6. With caliper in place, make sure brake hose is not twisted. Start bolts through sleeves in inner caliper ears and mounting bracket. Make sure that bolts pass under retaining ears in inner disc pad.
  7. Push bolts through holes in outer disc pads and caliper ears. Thread bolts into mounting bracket and tighten to 37 ft. lbs. (50 N.m). Fill master cylinder with new brake fluid.
  8. Pump brake pedal several times to seat disc pads against rotor. Clinch upper ears of outer disc pad with channel lock pliers, placing 1 jaw on top of upper ear and other jaw on bottom of disc pad, in notch.
  9. After clinching, ears should be flat against caliper housing with no radial clearance. If clearance exists, repeat procedure.
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