1992 Oldsmobile Achieva Brake Service (ONLINE REPAIR MANUALS)

• Inspect brake components for damage and/or wear. Replace as necessary.
• Inspect wheel cylinders. Excessive fluid indicates cup leakage and need for wheel cylinder replacement.
• Inspect backing plate for evidence of axle seal leakage.
• Inspect backing plate attaching bolts. Ensure bolts are tight.
• Check adjuster operation. If adjusters are worn, frozen or loose, replace adjuster and backing plate assembly as required.
• Using fine emery cloth or other suitable abrasive, clean rust and/or dirt from shoe contact surface on backing plate.

BRAKE DRUMS

Any time the brake drums are removed for brake se...

When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations the amount of asbestos dust from brake lining wear is at a low level due to a chemical breakdown during use, and a few precautions will minimize exposure.

• Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent excessive asbestos exposure.
• Wear a suitable respirator approved for asbestos dust use during all repair proced...

Brake System Bleed

Before bleeding the rear brakes, the rear displacement cylinder pistons must be returned to their top most position. Using a TECH 1 scan tool or suitable equivalent, enter the manual control function and "APPLY" the rear motor. Ensure the enable relay is "ON." If a scan tool is not available, bleed the front brakes to ensure that a firm brake pedal exists, then carefully drive vehicle over 4 mph to cause the ABS to initialize itself. This will return the rear displacement cylinder to the top position. The entire brake system should now be rebled.

PRESSURE BLEED

To pre...

REMOVAL

• Remove caliper assembly as described in "Caliper Service."
• Remove shoe and lining assemblies from caliper, Figs. through , noting the following:
• On models with tab mount outer shoe (all except series 3264), straighten bent over shoe tabs with suitable pliers.
• On models with spring mount outer shoe (series 3264), insert screwdriver between shoe and caliper and disengage buttons on shoe from holes in caliper.
• Remove sleeves and bushings from grooves in caliper mounting bolt holes, Figs. through .

INSTALLATION

• Lubricate new bushings with suitable grease, install bushings in cali...

BRAKE PEDAL

Toyota/GM Single Diaphragm Type

• With engine running and brake pedal in rest position, measure distance between face of pedal and floor mat.
• If distance is not 5.79-6.18 inches, adjust pedal height as follows:
• Remove left lower instrument panel trim section and air duct.
• Loosen stop lamp switch sufficiently to gain clearance for pedal adjustment.
• Loosen locknut and rotate pedal pushrod as needed to obtain specified pedal height, then tighten locknut.
• Adjust position of brake light switch so that plunger lightly contacts pedal stopper and brake lamps are off when pedal is release...

• After disassembling a power brake unit, soak all metal parts in solvent.
• Use only alcohol on parts containing rubber. After the parts have been thoroughly cleaned and rinsed in solvent, they should be rewashed in clean alcohol before assembling.
• Use compressed air to blow dirt and cleaning fluid from the recesses and internal passages.
• Always use ...