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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
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Experience:  Have owned a repair shop for 25 yrs.
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how do you replace the rear brakes on a 1990 chevy suburban

Customer Question

how do you replace the rear brakes on a 1990 chevy suburban 1500
Submitted: 5 years ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 5 years ago.

hi

this may help you

thanks

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For additional information see Removal Notes. See: Fundamentals and Basics

  1. Siphon enough brake fluid out of the master cylinder to bring fluid level to 1/3 full to avoid fluid overflow when the caliper piston is pushed back into its bore.
  2. Raise vehicle and remove front wheels.

 

Fig. 2 Compressing piston & shoes with C-clamp

 

  1. Using a C-clamp, push piston back into its bore.

 

Fig. 3 Caliper & Mounting Bolts

 

  1. Remove two mounting bolts and lift caliper away from disc. Hang caliper from coil spring with wire. CAUTION: Do not allow caliper to hang from brake hose.

 

 

Removal

 

Caliper Assembly

 

  1. Remove caliper assembly. See Brake Caliper / Service and Repair . See: Brake Caliper\Service and Repair
  2. Remove inboard pad. Dislodge outboard pad and position caliper on the front suspension so the brake hose will not support the weight of the caliper. CAUTION: Do not allow caliper to hang from brake hose.
  3. Remove pad support spring from piston.
  4. Remove two sleeves from inboard ears of the caliper.
  5. Remove four rubber bushings from the grooves in each of the caliper ears.
Installation

For additional information see Installation Notes. See: Fundamentals and Basics

Retracting Piston

 

  1. Retract piston in caliper bore and position caliper over disc, lining up holes in caliper with holes in mounting bracket. If brake hose was not disconnected during removal, be sure not to kink it during installation.

 

Caliper Mounting Bolts

 

  1. Start mounting bolts through sleeves in inboard caliper ears and the mounting bracket, making sure ends of bolts pass under ears on inboard pad. NOTICE: If the caliper was removed for service, make sure it is installed on the correct knuckle. The caliper bleed screw should be positioned on top of caliper when assembled on vehicle.
  2. Push mounting bolts through to engage holes in the outboard ears. Then thread mounting bolts into bracket.
  3. Torque mounting bolts to 50 Nm (37 ft lb) .

 

Caliper Knuckle Clearances

 

  1. Measure the clearance between the caliper and the steering knuckle. The clearance at each end of the caliper should be measured individually and added together. this total should be between 0.26-0.60 mm (0.010-0.024 inch) .
  2. If brake hose was removed, reconnect it and bleed the brakes.
  3. Install wheels and tires, lower vehicle and add brake fluid to master cylinder to bring level to 1/4 inch from top. WARNING: Before moving vehicle, pump brake pedal several times to be sure it is firm. Do not move vehicle until a firm pedal is obtained .
Installation

 

Caliper Assembly

 

  1. Lubricate new sleeves, rubber bushings, bushing grooves and mounting bolt ends with Delco Silicone Lube or equivalent.
  2. Install new bushings and sleeves on caliper ears. Position the sleeve so that the end toward the pad is flush with the machined surface of the ear.
  3. Install pad retaining spring on inner pad.
  4. Position inner pad in caliper so spring ends centrally contact pad edge. Initially, this will place the pad on an angle. Push upper edge of pad down until pad is flat against caliper. When properly seated, spring ends will not extend past pad more than 2.4 mm (0.1 inch).
  5. Position outer pad in caliper with pad ears over caliper ears and tab at bottom of pad engaged in caliper cutout.
  6. Install caliper. See Brake Caliper / Service and Repair . See: Brake Caliper\Service and Repair CAUTION: Make sure that the brake hose is not twisted or kinked since damage to the hose could result.

 

Compressing The Pad Ears

 

  1. Compress the pad ears to the caliper.

 

Caliper Knuckle Clearances

 

  1. Measure the clearance between the caliper and the steering knuckle. The clearance at each end of the caliper should be measured individually and added together. this total should be between 0.26-0.60 mm (0.010-0.024 inch) .
  2. Install tire and wheel assembly.
  3. Lower the vehicle. WARNING: Before moving vehicle, pump brake pedal several times to be sure it is firm. Do not move vehicle until a firm pedal is obtained .
Removal

For additional information see Notes, Warnings, and Hints. See: Fundamentals and Basics

Exploded View

 

  1. Raise and support vehicle, then remove tire and wheel assembly.
  2. Remove brake drum. If brake lining is dragging on brake drum, back off brake adjustment by rotating adjustment screw. If brake drum is rusted or corroded to axle flange and cannot be removed, lightly tap axle flange to drum mounting surface with a suitable hammer.
  3. Using brake spring pliers or equivalent, unhook primary and secondary return springs. Observe location of brake parts being removed to aid during installation.

NOTE: For additional information see Brake Spring Removal and Installation Notes. See: Fundamentals and Basics

  1. Remove brake hold-down springs with suitable tool.
  2. Lift actuating lever, then unhook actuator link from anchor pin and remove.
  3. Remove actuating lever and return spring.
  4. Spread shoes apart and remove parking brake strut and spring.
  5. Disconnect parking brake cable from lever, then remove brake shoes from backing plate.
  6. Separate brake shoes by removing adjusting screw and spring, then unhook parking brake lever from shoe assembly.
  7. Clean dirt from brake drum, backing plate and all other components. WARNING: Do not use compressed air or dry brush to clean brake parts. Many brake parts contain asbestos fibers which, if inhaled, can cause serious injury. Clean brake parts with a water soaked rag or a suitable vacuum cleaner to minimize airborne dust .
Installation

For additional information see Notes, Warnings, and Hints. See: Fundamentals and Basics

Exploded View

 

  1. Lubricate parking brake lever fulcrum with suitable brake lube, then attach lever to brake shoe. Ensure lever operates smoothly.
  2. Connect brake shoes with adjusting screw spring, then position adjusting screw. Ensure adjusting screw star wheel does not contact adjusting screw spring after installation, and also ensure right hand thread adjusting screw is installed on left side of vehicle and lefthand thread adjusting screw is installed on right side of vehicle. When brake shoe installation is completed, ensure star-wheel lines up with adjusting hole in backing plate.
  3. Lightly lubricate backing plate shoe contact surfaces with suitable brake lube, then the area where parking brake cable contacts backing plate.
  4. Install brake shoes on backing plate while engaging wheel cylinder links with shoe webbing. Connect parking brake cable to parking brake lever. The primary shoe (short lining) faces towards front of vehicle.

NOTE: For additional information see Brake Spring Removal and Installation Notes. See: Fundamentals and Basics

  1. Install actuating levers, actuating link and return spring.
  2. Install hold-down springs with suitable tool.
  3. Install primary and secondary shoe return springs using brake spring pliers or equivalent.

 

Fig. 7 Measuring Brake Drum Inside Diameter
Fig. 8 Adjusting Brake Shoes To Brake Drum Inside Diameter

 

  1. Using suitable brake drum to shoe gauge, Fig. 5, measure brake drum inside diameter. Adjust brake shoes to dimension obtained on outside portion of gauge, Fig. 6 .
  2. Install brake drum, wheel and tire assembly.
  3. If any hydraulic connections have been opened, bleed brake system.
  4. Adjust parking brake.
  5. Inspect all hydraulic lines and connections for leakage, and repair as necessary.
  6. Check master cylinder fluid level and replenish as necessary.
  7. Check brake pedal for proper feel and return.
  8. Lower vehicle and road test. CAUTION: Do not severely apply brakes immediately after installation of new brake linings or permanent damage may occur to linings, and/or brake drums may become scored. Brakes must be used moderately during first several hundred miles of operation to ensure proper burnishing of linings.

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