Master Cylinder - Subaru LEGACY Service Manual

BRAKE

8. Master Cylinder

A: REMOVAL
1) Thoroughly drain brake fluid from reservoir tank.
2) Disconnect fluid level indicator harness connec-
tor.
3) Remove brake pipes from master cylinder.
4) Remove master cylinder mounting nuts, and
take out master cylinder from brake booster.
CAUTION:
Be extremely careful not to spill brake fluid.
Brake fluid spilt on the vehicle body will harm
the painted surface; wash it off quickly if spilt.
B: INSTALLATION
1) To install the master cylinder to the body, re-
verse 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)
2) Bleed air from the brake system. <Ref. to BR-42,
PROCEDURE, Air Bleeding.>
CAUTION:
Be sure to use recommended brake fluid.
C: DISASSEMBLY
CAUTION:
• Remove mud and dirt from the surface of
brake master cylinder.
• Prepare tools necessary for disassembly op-
eration, and arrange them neatly on work
bench.
• Clean work bench.
1) Remove pin with drift pin which secures reserve
tank to master cylinder.
2) Remove cylinder pin with magnetic pick-up tool
while pushing in primary piston.
( 1 )
(1) Cylinder pin
MASTER CYLINDER
3) Pry up the pawl and remove the piston retainer.
(Without VDC)
NOTE:
Piston may jump out from master cylinder.
4) Using pliers, remove C-ring. (With VDC)
NOTE:
Piston may jump out from master cylinder.
5) Extract primary piston assembly and secondary
piston assembly.
CAUTION:
• Do not disassemble the piston assembly;
otherwise, the spring set value may be
changed.
• Use brake fluid to wash inside wall of cylin-
der, pistons and piston cups. Be careful not to
damage parts when washing.
D: ASSEMBLY
CAUTION:
• When assembling, be sure to use recom-
mended brake fluid.
• Ensure that the inside wall of cylinder, pis-
tons, and piston cups are free from dirt when
assembling.
• Be extremely careful not to damage, scratch,
or dent cylinder inside wall, pistons, and piston
cups.
BR-00069
• Do not drop parts. Never attempt to use any
part that has been dropped accidentally.
1) Apply recommended brake fluid to inside wall of
cylinder, and to outer surface of piston assembly,
and install piston assemblies carefully into cylinder.
BR-32
BR-00070
BR-00169