Fastener Tightening Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Bleeder Valve | 7 N.m | 62 lb in |
| Brake Pipe to Wheel Cylinder | 17 N.m | 12 lb ft |
| Wheel Cylinder Bolts | 12 N.m | 110 lb in |
Fastener Tightening Specifications
Drum Brake Component Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Brake Drum Discard Diameter | 251.5 mm | 9.902 in |
| Brake Drum Maximum Allowable Diameter After Refinish | 251.0 mm | 9.882 in |
| Brake Drum Maximum Allowable Radial Runout | 0.15 mm | 0.006 in |
| Brake Drum Maximum Allowable Scoring | 1.5 mm | 0.06 in |
Drum Brake Component Specifications
Diagnostic Starting Point - Drum Brakes
Begin the drum brake system diagnosis with Diagnostic Starting Point - Hydraulic Brakes in Hydraulic Brakes. The use of the Diagnostic Starting Point leads to the identification of the correct procedure for diagnosing the system and where the procedure is located.
Scheme 14
- Clean the brake shoe lining contact surface of the brake drum with denatured alcohol or an equivalent brake cleaner.
- Using a brake drum micrometer calibrated in thousands of an inch, measure and record the largest diameter of the brake drum at four or more points, equally spaced around the drum. Ensure that the measurements are only taken within the brake shoe lining contact area and that the micrometer is positioned the same distance from the outside edge of the drum for each measurement.
- Compare the largest diameter measurement recorded to the following specifications: Specification: Brake drum maximum allowable diameter after refinishing 251.0 mm (9.882 in). Brake drum discard diameter 251.5 mm (9.902 in).
- If the largest diameter measurement of the brake drum is less than the maximum allowable diameter after refinishing specification; the drum may be able to be refinished, depending upon surface and wear conditions which may be present.
- If the largest diameter measurement of the brake drum is equal to or greater than the maximum allowable diameter after resurfacing specification; the drum may not be refinished.
- If the largest diameter measurement of the brake drum is equal to or greater than the discard diameter specification; the drum requires replacement.
Tools Required
J 8001 Dial Indicator, or equivalent. See Special Tools and Equipment .
Inspection Procedure
- With the brake drum removed, clean the braking (friction) surface of the brake drum with denatured alcohol or an equivalent approved brake cleaner.
- Inspect the braking surface of the brake drum for the following Braking Surface Conditions: Heavy rust and/or pitting Light surface rust can be removed with an abrasive disc; heavy surface rust and/or pitting must be removed by refinishing the drum. Cracks and/or heat spots Excessive blueing discoloration Missing balance weights
- If the braking surface of the brake drum exhibits one or more of the Braking Surface Conditions, the drum requires refinishing or replacement.
- Using a brake drum micrometer calibrated in thousands of an inch, measure and record any grooves present on the drum braking surface. Ensure that the measurements are only taken within the brake shoe lining contact area.
- Compare the groove (scoring) depth recorded to the following specification: Specification: Brake drum maximum allowable scoring 1.5 mm (0.06 in).
- If the brake drum scoring depth exceeds the specification, or if an excessive amount of scoring is present, the drum requires refinishing or replacement.
- Mount the brake drum on a brake lathe.
- Mount a dial indicator, J 8001 or equivalent, and position the indicator button so it contacts the braking surface of the brake drum at a 90 degree angle, approximately 19 mm (0.75 in) from the drum's outer edge.
- Measure and record the radial runout of the brake drum. Rotate the drum until the lowest reading is displayed on the indicator dial, then zero the dial. Rotate the drum until the highest reading is displayed on the dial.
- Compare the radial runout of the brake drum to the following specification: Specification: Brake drum maximum allowable radial runout 0.15 mm (0.006 in).
- If the brake drum radial runout exceeds the specification, the drum requires refinishing or replacement.
Scheme 15
- Visually inspect the drum brake system hold-down springs (4) for the following: Excessive corrosion Damaged or bent locating pins Broken spring coils Damaged retaining cups
- Visually inspect the lower return spring (7) and the upper return/adjuster actuator spring (3) for the following: Excessive corrosion Excessive stretching Broken hook ends Twisting or binding
- If any of the conditions listed were found, the drum brake system hardware requires replacement.
- Visually inspect the park brake lever (5) for the following: Bent Broken pivot Broken at park brake cable attachment
- If any of the conditions listed were found, the park brake lever and/or attaching hardware requires replacement.
Scheme 16
| CAUTION | Refer to Brake Dust Caution in Cautions and Notices. |
- Visually inspect the adjuster actuator spring (2) for the following: Excessive corrosion Excessive stretching Broken hook ends Twisting or binding Missing
- If any of the conditions listed were found, the drum brake system adjuster hardware requires replacement.
- Visually inspect the adjuster actuator lever (1) for the following conditions: Bent Broken Missing Broken spring attachment tab
- If any of the conditions listed were found, the adjuster actuator lever and/or attaching hardware requires replacement.
Removal Procedure
| CAUTION | Refer to Brake Dust Caution in Cautions and Notices. |
Scheme 17
- Release the parking brake.
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
- Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Mark the relationship of the drum to the hub.
- Remove and discard the retaining clip (if applicable).
- Remove the brake drum.
- If the brake drum does not come off easily, perform the following steps: Loosen the parking brake cable. Remove the access hole plug from the backing plate. Insert a flat-bladed tool (2) through the backing plate access hole in order to disengage the self adjuster. Insert another flat-bladed tool through the same backing plate access hole in order to loosen the adjuster screw. Install the access hole plug in order to prevent dirt or contamination from entering the drum brake. Apply a small amount of penetrating oil around the brake drum center hole. Remove the brake drum.
Installation Procedure
- Align the marks on the brake drum and the hub made during the removal procedure.
- Install the brake drum.
- Inspect the brake to shoe adjustment. Refer to «Drum Brake Adjustment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Lower the vehicle.
Brake Drum Refinishing
Tools Required
- J 41013 Rotor/Drum Flange Resurfacing Kit
- J 42450-A Hub Cleaning Kit
| CAUTION | Refer to Brake Dust Caution in Cautions and Notices. |
- The brake drums do not require refinishing as part of routine brake system service. Do not refinish brake drums in an attempt to correct the following conditions: Brake system noise (squeal, growl, groan) Uneven and/or premature brake lining wear Superficial or cosmetic corrosion/rust of the brake drum surface Scoring of the brake drum surface (less than the maximum allowable specification)
- Brake drums should only be refinished if the following conditions exist: Excessive corrosion/rust and/or pitting Cracks and/or heat spots Excessive blueing discoloration Scoring of the brake drum surface (in excess of the maximum allowable specification) Radial runout in excess of the maximum allowable specification
- Inspect each of the brake drums and determine if the brake drums can be refinished and remain within the maximum allowable diameter after refinish specification: With the tire and wheel assemblies removed, measure the diameter of each of the brake drums. Refer to «Brake Drum Diameter Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) . Inspect each of the brake drums for excessive surface wear and/or radial runout. Refer to «Brake Drum Surface and Wear Inspection»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- If the brake drums can be refinished, proceed with the rotor refinishing procedure.
- If necessary, use the J 41013 in order to thoroughly clean any corrosion/rust from the brake drum flange.
- Mount the brake drum to the brake lathe according to the lathe manufacturer's instructions.
- Ensure that any vibration dampening attachments are securely in place.
- With the brake lathe running, slowly bring in the cutting tool until it just contacts the brake drum friction surface.
- Observe the witness mark on the brake drum. If the witness mark extends approximately three-quarters or more of the way around the brake drum surface, the brake drum is properly mounted to the lathe.
- If the witness mark does not extend three-quarters or more of the way around the brake drum, re-mount the brake drum to the lathe.
- Following the brake lathe manufacturer's instructions, refinish the brake drum.
- After each successive cut, inspect the brake drum diameter. Refer to «Brake Drum Diameter Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- If at any time the brake drum exceeds the maximum allowable diameter after refinish specification, the brake drum must be replaced.
- After refinishing the brake drum, use the following procedure in order to obtain the desired non-directional finish: Follow the brake lathe manufacturer's recommended speed setting for applying a non-directional finish Using moderate pressure, apply the non-directional finish: If the lathe is equipped with a non-directional finishing tool, apply the finish with 120 grit aluminum oxide sandpaper. If the lathe is not equipped with a non-directional finishing tool, apply the finish with a sanding block and 150 grit aluminum oxide sandpaper. After applying a non-directional finish, clean each friction surface of the brake drum with denatured alcohol or an equivalent brake cleaner
- Remove the brake drum from the brake lathe. IMPORTANT: Failure to clean the corrosion from the wheel bearing flange may result in increased lateral runout of the brake drum and brake system pulsation.
- If necessary, use the J 42450-A in order to thoroughly clean any corrosion from the wheel bearing flange.
| CAUTION | Refer to Brake Dust Caution in Cautions and Notices. |
| CAUTION | Keep fingers away from rear brake shoe springs to prevent fingers from being pinched between spring and shoe web or spring and backing plate. |
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
- Remove the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Disengage the adjuster spring hook end from the tab on the adjuster actuator (1).
- Remove the straight end of the adjuster spring from the brake shoe.
- Remove the adjuster actuator from the brake shoe.
- Remove the return spring (7) from the brake shoes.
- Remove the park brake cable (6) from the park brake actuator lever (5).
- Remove the brake shoe hold-down springs and retainers (4) from the brake shoes.
- Remove the adjuster from the brake shoes and the park brake actuator lever (2).
- Remove the horseshoe clip retaining the park brake actuator lever to the brake shoe.
- Remove the park brake actuator lever and wave washer from the brake shoe.
- Clean all of the drum brake system components with denatured alcohol.
- Inspect all of the drum brake system components. Refer to «Drum Brake Hardware Inspection»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) and «Drum Brake Adjusting Hardware Inspection»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Replace drum brake system components as necessary.
- Inspect the wheel cylinder for the following conditions: Brake fluid leakage Worn or damaged dust boots
- Replace damaged or leaking wheel cylinders as necessary. Refer to «Wheel Cylinder Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Apply GM P/N 1052196 (Canadian P/N 5264008) brake lubricant or equivalent to the following areas: The brake shoe contact points on the backing plate The adjuster screw threads The inside diameter of the adjuster socket
- Install the park brake actuator lever and wave washer to the brake shoe.
- Install the horseshoe clip to the park brake actuator lever pivot pin.
- Install the brake shoes to the brake backing plate.
- Install the brake shoe hold-down pins, springs and retainers (4) to the brake shoes.
- Install the park brake cable (6) to the park brake actuator lever.
- Install the adjuster screw to the brake shoe and the park brake actuator.
- Apply GM P/N 1052196 (Canadian P/N 5264008) brake lubricant or equivalent to the adjuster actuator/brake shoe interface.
- Install the adjuster actuator (1) to the brake shoe.
- Install the straight end of the adjuster spring (3) to the brake shoe.
- Install the adjuster spring hook end to the tab on the adjuster actuator (1).
- Install the return spring (7) to the brake shoes.
- Move the park brake actuator lever (5) in order to spread the brake shoes apart. The adjuster actuator lever should move downward, then upward as the park brake actuator lever is released, forcing the adjuster wheel to rotate. If the adjuster does not operate properly, remove then reinstall the adjuster.
- Adjust the brake shoes. Refer to «Drum Brake Adjustment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Adjust the park brake cable. Refer to «Park Brake Adjustment (Disc)»(/buick/rendezvous/i-2001-2007/remont/parking-brake-system/#parking-brake-system) or «Park Brake Adjustment (Drum)»(/buick/rendezvous/i-2001-2007/remont/parking-brake-system/#parking-brake-system__park-brake-adjustment-drum) in Park Brake.
- Install the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Lower the vehicle.
J 37043 Parking Brake Cable Release Tool. See Special Tools and Equipment .
| CAUTION | Refer to Brake Dust Caution in Cautions and Notices. |
Note. Do not pry against the splash shield or backing plate in attempt to free the drum. This will bend the splash shield or backing plate. A bent backing plate may cause brake chatter and/or pulsation.
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
- Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Remove the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the brake shoes. Refer to «Brake Shoe Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the park brake cable from the park brake actuator lever.
- Using the J 37043 , remove the park brake cable ONLY from the backing plate. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the wheel cylinder (3). Refer to «Wheel Cylinder Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the wheel bearing/hub. Refer to «Wheel Bearing/Hub Replacement - Rear (Front Wheel Drive/Drum)»(/buick/rendezvous/i-2001-2007/remont/suspension-rear/#rear-suspension-system) or «Wheel Bearing/Hub Replacement - Rear (Disc and AWD)»(/buick/rendezvous/i-2001-2007/remont/suspension-rear/#rear-suspension-system) in Rear Suspension.
- Remove the backing plate.
- Install the backing plate.
- Install the wheel bearing/hub. Refer to «Wheel Bearing/Hub Replacement - Rear (Front Wheel Drive/Drum)»(/buick/rendezvous/i-2001-2007/remont/suspension-rear/#rear-suspension-system) or «Wheel Bearing/Hub Replacement - Rear (Disc and AWD)»(/buick/rendezvous/i-2001-2007/remont/suspension-rear/#rear-suspension-system) in Rear Suspension.
- Install the wheel cylinder. Refer to «Wheel Cylinder Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Install the park brake cable to the backing plate.
- Install the park brake cable (6) to the park brake actuator (5).
- Install the brake shoes. Refer to «Brake Shoe Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Adjust the brake shoes. Refer to «Drum Brake Adjustment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Adjust the park brake cable. Refer to «Park Brake Adjustment (Disc)»(/buick/rendezvous/i-2001-2007/remont/parking-brake-system/#parking-brake-system) or «Park Brake Adjustment (Drum)»(/buick/rendezvous/i-2001-2007/remont/parking-brake-system/#parking-brake-system__park-brake-adjustment-drum) .
- Install the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Lower the vehicle.
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
- Remove the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Disengage the adjuster spring hook end from the tab on the adjuster actuator (1).
- Remove the straight end of the adjuster spring from the brake shoe.
- Remove the return spring (7) from the brake shoes.
- Remove the brake shoe hold-down springs and retainers (4) from the brake shoes.
- Remove the park brake actuator lever and wave washer from the brake shoe.
- Clean all of the drum brake system components with denatured alcohol.
- Inspect all of the drum brake system components. Refer to «Drum Brake Hardware Inspection»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) and «Drum Brake Adjusting Hardware Inspection»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Install the brake shoe hold-down pins, springs and retainers (4) to the brake shoes.
- Install the straight end of the adjuster spring (3) to the brake shoe.
- Install the adjuster spring hook end to the tab on the adjuster actuator (1).
- Install the return spring (7) to the brake shoes.
- Install the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Lower the vehicle.
- Remove the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the adjuster spring (3) from the adjuster actuator lever.
- Remove the straight end of the adjuster actuator spring from the brake shoe.
- Remove the adjuster actuator lever (1).
- Install the adjuster actuator lever (1).
- Install the straight end of the adjuster spring (3) to the brake shoe.
- Install the hook end of the adjuster spring to the adjuster actuator lever.
- Inspect the adjuster (2) for proper engagement with the drum brake system components.
- Install the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
J 38400 Brake Shoe Spanner and Spring Remover. See Special Tools and Equipment .
| CAUTION | Refer to Brake Fluid Irritant Caution in Cautions and Notices. |
Note. Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
- Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Clean all dirt and foreign material from the wheel cylinder brake pipe fitting and the bleeder valve.
- Remove the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the brake pipe nut.
- Install a cap over the end of the brake pipe in order to prevent brake fluid loss and/or brake fluid contamination.
- Remove the wheel cylinder bolts (2).
- Use the J 38400 in order to spread the brake shoes apart (1). See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Remove the wheel cylinder.
- Clean the old sealant from the backing plate where the wheel cylinder was installed. Clean the sealant from the wheel cylinder if you are reusing the wheel cylinder.
- Apply LOCTITE® GM P/N 12345382 (or equivalent) to the wheel cylinder shoulder face which contacts the backing plate.
- Use the J 38400 in order to spread the brake shoes apart (1). See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Install the wheel cylinder.
- Install the wheel cylinder bolts (2). Tighten: Tighten the bolts to 12 N.m (110 lb in).
- Remove the cap from the brake pipe and install the brake pipe to the wheel cylinder. Tighten: Tighten the nut to 17 N.m (12 lb ft).
- Install the brake drum. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Bleed the hydraulic brake system at the wheel cylinder. Refer to «Hydraulic Brake System Bleeding (Manual)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
- Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Lower the vehicle.
J 21177-A Drum-to-Brake Shoe Clearance Gage. See Special Tools and Equipment .
Adjustment Procedure
| CAUTION | Refer to Brake Dust Caution in Cautions and Notices. |
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
- Remove the rear wheels and tires. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Relieve cable tension from the park brake system at the equalizer. there should be no tension on the park brake cables, so that the brake shoes are positioned only by the adjuster strut.
- Remove the rear drums. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Set the J 21177-A so that the J 21177-A contacts the inside diameter of the drum at the widest point. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Position the J 21177-A over the shoes at the widest point. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Turn the adjuster nut until the shoes just contact the J 21177-A . See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Repeat steps 2-7 for the other rear brake assembly.
- Install the rear drums. Refer to «Brake Drum Replacement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#drum-brake-system) .
- Install the rear wheels and tires. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
- Adjust the park brake cable system. Refer to «Park Brake Adjustment (Disc)»(/buick/rendezvous/i-2001-2007/remont/parking-brake-system/#parking-brake-system) or «Park Brake Adjustment (Drum)»(/buick/rendezvous/i-2001-2007/remont/parking-brake-system/#parking-brake-system__park-brake-adjustment-drum) in Park Brake.
- Lower the vehicle.
System Component Description
The drum brake system consists of the following
System Operation
Mechanical output force is applied from the hydraulic brake wheel cylinder pistons to the top of the drum brake shoes. The output force is then distributed between the primary and secondary brake shoes as the shoes expand toward the friction surface of the brake drums. The brake shoes apply the output force to the friction surface of the brake drums, which slows the rotation of the tire and wheel assemblies. The proper function of both the drum brake hardware and adjusting hardware is essential to the proper distribution of braking force.
Special Tools
Special Tools Illustration Tool Number/Description J 8001 Dial Indicator Set J 21177-A Drum to Brake Shoe Clearance Gage J 37043 Parking Brake Cable Release Tool J 38400 Brake Shoe Spanner and Spring Remover J 41013 Rotor/Drum Flange Resurfacing Kit
Scheme 18
Scheme 19
Scheme 20
See also:
• Diagnostic Starting Point - Hydraulic Brakes
• Brake Dust Caution
• Lifting and Jacking the Vehicle
• Tire and Wheel Removal and Installation
• Park Brake Adjustment (Disc)
• Park Brake Adjustment (Drum)
• Wheel Bearing/Hub Replacement - Rear (Front Wheel Drive/Drum)
• Brake Fluid Irritant Caution
• Brake Fluid Effects on Paint and Electrical Components Notice
• Hydraulic Brake System Bleeding (Manual)
• Special Tools and Equipment