Brake Fluid And Brake Fluid Handling; Vacuum Brake Booster Description - GMC chervolet camaro 1999 Service Manual

5·54 Hydraulic Brakes
Brake Fluid and Brake Fluid Handling
Caution: Use only SUPREME 11 or equivalent
DOT 3 brake fluid from a clean, sealed container.
Do not use fluid from an open container that
may be contaminated with water. Improper or
contaminated .fluid will result in damage to
components or loss of braking, with possible
personal injury.
Notice: Avoid spilling brake fluid on any of the
vehicl.e's painted surfaces, wiring, cables, or electric
connectors. Brake fluid will damage the paint and
the electrical connections. If any fluid is spilled on the
vehicle, flush the area to lessen the damage.
Important:
• Do not re-use fluid accumulated during brake
hydraulic system bleeding.
• Store brake fluid in a closed container.
• Reseal brake fluid containers immediately
after use.
• Do not use fluid left in an open or improperly
sealed container. Fluid left in an open or
improperly sealed container absorbs moisture and
may become contaminated.
If rubber deterioration is evident, complete the
following procedure:
1. Disassemble all hydraulic parts.
2. Wash all the hydraulic parts with alcohol.
3. Dry the parts with non-lubricated compressed air
before reassembly in order to keep alcohol out of
the system.
4. Replace all the rubber parts in the system,
including the following components:
• Brake hoses
• Master cylinder rubber parts
• Brake caliper boots and seals
• Wheel cylinder boots and seals
5. Replace the combination valve and the brake
pressure modulator valve. Both valves have
rubber components inside which are not
serviceable.
6. Inspect the pads for brake fluid. If excessive
brake fluid is present, replace the pads.
Substandard or Contaminated Brake Fluid
Caution: Use only SUPREME 11 or equivalent
DOT 3 brake fluid from a clean, sealed container.
Do not use fluid from an open container that
may be contaminated with water. Improper or
contaminated fluid will result in damage to
components or loss of braking, with possible
personal injury.
Brakes
Vacuum Brake Booster Description
Important:
• Do not use lubricated compressed air on the
brake parts. This action may result in damage to
the rubber parts.
• Replace all of the components that are included in
the repair kits used to service this booster ..
• Lubricate the rubber parts in order to ease
assembly. Use fresh brake fluid.
• If you remove or disconnect any· hydraulic
component, bleed all or part of the brake system.
• The specified torque values are for dry,
non-lubricated fasteners.
This vacuum booster is a tandem vacuum suspended
unit. When the service brakes are released, the
tandem vacuum booster operates with vacuum on
both sides of the diaphragm. When the brakes
are applied, air at atmospheric pressure is admitted to
one side of the diaphragm. This draws air from the
booster through the vacuum check valve to the
vacuum source. The internal components of this
booster cannot be serviced. Do not unstake and
separate tne housing. Separating the housing will
cause permanent deformation of the booster and
prevent the booster from holding the proper volume.
Routing
Power brake booster vacuum hose routing on the
3800 V6 series engine.
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