1993 BMW 535I Brake Service (ONLINE REPAIR MANUALS)

Refer to Fig. , for hy...

• Connect suitable pressure bleeder to brake fluid reservoir. Maximum charging pressure is 43.5 psi.
• Attach bleeder hose and container to right rear wheel. Bleed until no bubbles appear.
• Repeat step 2 for left rear, right front and left front wheels.
• Support rear suspension at wheel carriers and lower car so rear suspension compresses to its normal loaded position (to prevent damage to output shaft joints). Wheels must be able to turn freely.
• Attach...

Front Brake Pads, Replace

318 & 325

• Raise and support vehicle, then remove front wheels.
• Remove brake pad wear indicator connector from left side of caliper.
• Remove anti-rattle clip, then the caliper sliding bolt plastic caps.
• Lift brake hose out of holder, then remove caliper sliding bolts.
• Remove caliper toward rear. Remove brake pads, then suspend caliper from frame with wire.
• Reverse procedure to install, noting the following:
• Compress caliper piston into bore.
• Check fluid level and bleed brake system as necessary.
• Tighten to specifications.

Except 318 & 325

• Remove wheels and disconne...

Caliper, Replace

Front

• Raise and support vehicle, then remove front wheel.
• Drain a moderate amount of brake fluid from reservoir with a syringe.
• Disconnect caliper brake hose.
• Remove caliper bolts and disconnect brake pad wear sensor electrical connector, if necessary.
• Remove caliper toward rear.
• Reverse procedure to install, noting the following:
• Tighten bolts to specifications.
• Bleed brake system.
• Ensure brake pad wear sensor wire does not contact rotor or wheel.

Rear

• Raise and support vehicle, then remove wheel.
• Drain a moderate amount of brake fluid from reservoir with a syringe.
• Disconne...

H-31 Hydraulic System

The H-31 hydraulic system, Fig. , incorporates a power flow regulator which diverts a small flow of fluid from the power steering operating circuit for the power assisted brake system. It charges the hydraulic reservoir in a high pressure range without impairing the function of power steering. The pressurized hydraulic oil volume is supplied to the booster for the sake of power assistance and is applied by operating the connected standard tandem master cylinder. should the power steering pump fail, the hydraulic reservoir has sufficient reserve pressure to permi...

The Anti-Lock Brake System (ABS) consists of a control unit, hydraulic unit, speed sensors and wiring harness. Each speed sensor has a gear wheel which runs past the permanently magnetized edge of the speed sensor installed in the wheel hub. The rotary motion of the wheels is recorded by inductive sensors and an electric signal is sent to the electronic control unit.

The electronic control unit is located in a compartment on the right side of the engine compartment. This control unit inputs acceleration, deceleration and slip factors from the electronic speed sensors, which are propo...