1993 Chevrolet Cavalier Brake Service (ONLINE REPAIR MANUALS)

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...

AC-DELCO TANDEM DIAPHRAGM TYPE

Hard Pedal

• Internal vacuum leak.
• Faulty control valve.

Brakes Grab

• Faulty control valve.

Slow Or No Release

• Faulty pushrod adjustment.
• Bind in linkage.

BCIA SINGLE & TANDEM DIAPHRAGM TYPE

Brakes Grab

• Internal vacuum leak.
• Faulty control valve

Excessive Pedal Effort

• Leak in booster vacuum supply.
• Glazed linings.
• Contaminated brake fluid.
• Restricted filter or booster valve air passage.
• Leak in booster vacuum supply.
• Damaged booster or improperly assembled booster valve.

Brakes Slow To Respond

• Restricted filter or booster valve air passage.
• Contaminated brake fluid.
• Leak in...

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...

Two basic types of power assist mechanisms are used: vacuum assist diaphragm assemblies, which use engine vacuum or, in some cases vacuum pressure developed by an external vacuum pump. The second type is a hydraulic pressure assist mechanism, which use pressure developed by an external pump (usually the power steering pump). Both systems act to increase the force exerted on the master cylinder piston by the operator. This in turn increases the hydraulic pressure delivered to the wheel cylinders, while decreasing driver effort necessary to obtain acceptable stopping performance.

V...

The rear drum brakes have self-adjusting shoe mechanisms that assure correct lining-to-drum clearances at all times. The automatic adjusters operate only when the service brakes are applied.

Although the brakes are self-adjusting, an initial adjustment is necessary after the brake shoes have been replaced, or when the length of the star wheel adjuster has been changed during some other service operation.

SERVICE BRAKE ADJUSTMENT

• Raise and support vehicle, then remove rear wheels and brake drums.
• Check to make sure parking brake cable linkage and levers on secondary brake shoe are in "fre... "

The rear drum brakes have self-adjusting shoe mechanisms that assure correct lining-to-drum clearances at all times. The automatic adjusters operate only when the service brakes are applied.

Although the brakes are self-adjusting, an initial adjustment is necessary after the brake shoes have been replaced, or when the length of the star wheel adjuster has been changed during some other service operation.

SERVICE BRAKE ADJUSTMENT

• Raise and support vehicle, then remove rear wheels and brake drums.
• Check to make sure parking brake cable linkage and levers on secondary brake shoe are in "fre... "