1996 Oldsmobile Delta 88 Brake Service (ONLINE REPAIR MANUALS)

Caliper Removal

• Remove approximately ^2/3 of brake fluid from master cylinder.
• Raise and support front of vehicle, then remove wheel and tire assembly.
• Position suitable pliers over inboard pad and housing as shown in Fig. , and squeeze pliers to compress caliper piston.
• If caliper assembly is being removed for service, remove inlet fitting attaching bolt, copper washer, and inlet fitting from caliper housing. Plug opening in inlet fitting to prevent fluid loss and contamination. Do not crimp brake hose, as this may damage internal structure of hose. If only shoe and lining assemblie...

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...

AC-Delco Tandem Diaphragm Type

This unit utilizes a vacuum power chamber, consisting of a front and rear shell, housing divider, front and rear diaphragm, plate assemblies, hydraulic pushrod and a diaphragm return spring, Figs. and .

In normal operating mode, with service brakes in released position, the booster operates with vacuum on both sides of its diaphragms. When brakes are applied, air at atmospheric pressure is admitted to one side of each diaphragm to provide power assist. When the service brake is released, atmospheric air is shut off from one side of each diaphragm. The a...

System Operation

The purpose of the anti-lock brake system, Fig. and , is to prevent wheel lock-up under heavy braking conditions on virtually any road surface. When a wheel locking condition exists, the Pressure Modulator Valve (PMV) assembly isolates each wheel's hydraulic circuit, then begins modulation of fluid pressure according to wheel speed inputs to the Electronic Brake Control Module (EBCM) or Electronic Brake and Traction Control Module (EBTCM). The PMV is controlled by the EBCM.

Modulation occurs by means of three ABS modes: pressure hold, pressure reduce and pressure in...

Manual

Pressure bleeding is recommended for all hydraulic systems. However, if a pressure bleeder is unavailable, use the following procedure. Brake fluid damages painted surfaces. Immediately clean any spilled fluid.

• Remove vacuum reserve by pumping brakes several times with engine off.
• Fill master cylinder reservoir with clean brake fluid. Check fluid level often during bleeding procedure; do not let reservoir fall below half full.
• If necessary, bleed master cylinder as follows:
• Disconnect master cylinder forward brake line connection until fluid flows from reservoir. Reconnect ...

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...