Disassembly Procedure
Caution: Do not disturb or remove the screw which retains the primary spring
to the secondary piston. This screw has been set to a predetermined height,
and the performance of the master cylinder will be adversely affected if this
setting is changed. An improperly adjusted screw may result in
poor brake performance and possible personal injury.
Notice: Do not overtighten vise, or damage to the master cylinder
will result.
- Remove the master cylinder.Refer to
Master Cylinder Replacement
.
- Wipe the reservoir cap clean.
- Remove the reservoir cap and the diaphragm.
Important: The reservoir cap and the diaphragm may be inspected and serviced without
removing the master cylinder from the vehicle.
- Replace the reservoir cap (1) and the diaphragm (3) if the following
damage is evident:
- Remove the fluid level sensor. Refer to
Brake Fluid Level Indicator Switch Replacement
.
- Remove the proportioning valves. Refer to
Proportioning Valve Replacement
.
- Remove the retainer (7)
while depressing the primary piston (8). Use care so that you do not damage
the piston, the bore or the retainer groove.
- Apply low pressure, non-lubricated, compressed air into the upper
outlet port at the blind end of the bore while the other outlet ports are
plugged. Do this in order to remove the following parts:
8.2. | Secondary piston (10) |
8.4. | Spring retainer (12) |
- Remove the seals (9) and the spring retainer (12) from the secondary
piston (10).
- Inspect the master cylinder for scoring or corrosion. Replace
the master cylinder if damage exists.
Do not use abrasives in the bore.
- Clean all of the parts in clean, denatured alcohol.
- Dry the parts with non-lubricated, compressed air.
Assembly Procedure
- Install the lubricated
seals (9) and the spring retainer (12) onto the secondary piston(10).
- Install the spring (13) and the secondary piston (10) into the
cylinder bore. Lubricate the parts with clean brake fluid in order to ease
assembly.
- Install the lubricated primary piston (8) into the cylinder bore.
- While depressing the primary piston (8), install the retainer
(7).
- Install the proportioning valves. Refer to
Proportioning Valve Replacement
.
- Install the fluid level sensor. Refer to
Brake Fluid Level Indicator Switch Replacement
.
- Insert the diaphragm into the reservoir cap.
Install the cap on the reservoir.
- Install the master cylinder.Refer to
Master Cylinder Replacement
.