Subaru 2002 IMPREZA Service Manual page 2325

11.Master Cylinder
A: REMOVAL
1) Thoroughly drain brake fluid from reservoir tank.
2) Disconnect the fluid level indicator harness con-
nector.
3) Remove the brake pipes from master cylinder.
4) Remove the master cylinder mounting nuts, and
take out master cylinder from brake booster.
CAUTION:
Be extremely careful not to spill the brake fluid.
Brake fluid spilt on the vehicle body will harm
the painted surface; wipe it off quickly if spilt.
B: INSTALLATION
1) To install the master cylinder to body, reverse
the sequence of removal procedure.
Tightening torque:
Master cylinder mounting nut
14 N·m (1.4 kgf-m, 10.1 ft-lb)
Piping flare nut
15 N·m (1.5 kgf-m, 10.8 ft-lb)
CAUTION:
Be sure to use recommended brake fluid.
2) Bleed air from the brake system. <Ref. to BR-57,
PROCEDURE, Air Bleeding.>
MASTER CYLINDER
C: DISASSEMBLY
1. PRECAUTIONS FOR DISASSEMBLING
1) Remove mud and dirt from the surface of brake
master cylinder.
2) Prepare tools necessary for disassembly opera-
tion, and arrange them neatly on the work bench.
3) Clean the work bench.
2. DISASSEMBLING PROCEDURE
1) Remove the pin with drift pin which secures re-
serve tank to master cylinder.
2) Remove the cylinder pin with magnetic pick-up
tool while pushing in primary piston. (with ABS)
3) Pry up the pawl and remove piston retainer.
NOTE:
The piston may jump out from master cylinder.
4) Extract the primary piston assembly and sec-
ondary piston assembly.
CAUTION:
• Do not disassemble the piston assembly;
otherwise, the spring set value may be
changed.
• Use brake fluid or methanol to wash the in-
side wall of cylinder, pistons and piston cups.
Be careful not to damage the parts when wash-
ing. If methanol is used for washing, do not dip
rubber parts, such as piston cups, in it for more
than 30 seconds; otherwise, they may become
swelled.
BR-47
(1) Cylinder pin
BRAKE
S4M0123B
S4M0124