Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 559
BR-21
Front Disc Brake Assembly
BRAKE
NOTE:
Install the pad indicator in proper direction.
6) Install the caliper body to the support.
Tightening torque:
27 N·m (2.75 kgf-m, 19.9 ft-lb)
7) Connect the brake hose using a new brake hose
gasket.
Tightening torque:
18 N·m (1.84 kgf-m, 13.3 ft-lb)
8) Bleed air from the brake system. <Ref. to BR-41,
C: DISASSEMBLY
1. BREMBO TYPE
1) Remove mud and foreign matter from the caliper
body.
CAUTION:
Be careful not to allow foreign matter to enter
the brake hose connector.
2) Remove the piston boots from each piston end.
3) Place a wooden block in the caliper body as
shown in the figure to prevent the piston from jump-
ing out and being damaged.
4) Gradually apply compressed air via the brake
hose installation hole to push the piston out.
5) Remove the piston seal (1) from the caliper body
cylinder.
CAUTION:
Do not damage the cylinder and piston seal
groove.
(1) LH — IN
(2) LH — OUT
(3) RH — IN
(4) RH — OUT
(5) Pad indicator
(6) Pad return spring
(1)
(2)
(3)
(4)
BR-00886
(6)
(5)
(6)
(5)
(6)
(5)
(6)
(5)
(1) Place a wooden block of 30 mm (1.18 in) width.
BR-00303
(1)
BR-00304
(1)
BR-00305
BR-22
Front Disc Brake Assembly
BRAKE
2. EXCEPT FOR BREMBO TYPE
1) Remove mud and foreign matter from the caliper
body and the support.
CAUTION:
Be careful not to allow foreign matter to enter
the brake hose connector.
2) Place a wooden block in the caliper body as
shown in the figure to prevent the piston from jump-
ing out and being damaged.
3) Gradually apply compressed air via the brake
hose installation hole to push the piston out.
4) Remove the piston boot.
5) Remove the piston seal (1) from the caliper body
cylinder.
CAUTION:
Do not damage the cylinder and piston seal
groove.
6) Remove the guide pin and boot from caliper
body.
D: ASSEMBLY
1. BREMBO TYPE
1) Clean the inside of the caliper body using brake
fluid.
2) Apply a coat of brake fluid to piston seal and in-
stall the piston seal to the caliper body groove.
3) Apply a coat of brake fluid to the inner surface of
cylinder and the entire outer surface of the piston.
4) Apply NIGLUBE RX-2 (Part No. K0779GA102)
or the piston kit grease to the boot, and install to the
piston groove.
5) Insert the piston into the cylinder.
CAUTION:
Do not force the piston into cylinder.
6) Position the boot in the grooves on cylinder and
piston.
(1) Place a wooden block of 30 mm (1.18 in) width.
BR-00026
(1)
BR-00240
BR-00027
(1)
(1) Piston seal
(2) Piston boot
(3) Piston
BR-00307
(1)
(2)
(3)
BR-00309
BR-23
Front Disc Brake Assembly
BRAKE
2. EXCEPT FOR BREMBO TYPE
1) Clean the inside of the caliper body using brake
fluid.
2) Apply a coat of brake fluid to piston seal and in-
stall the piston seal to the caliper body groove.
3) Apply a coat of brake fluid to the inner surface of
cylinder and the entire outer surface of the piston.
4) Apply grease contained in the piston seal kit to
the boot, and install it to the groove at the end of the
cylinder.
5) Insert the piston into cylinder.
CAUTION:
Do not force the piston into cylinder.
6) Position the boot in the grooves on cylinder and
piston.
7) Apply a coat of the grease included with the pis-
ton kit to the lock pin and guide pin outer surface,
cylinder inner surface, and boot grooves.
8) Insert the lock pin and guide pin boot into the
support.
CAUTION:
After inserting the pin into the given place,
move the caliper by hand to make sure that it
moves smoothly without obstacles or exces-
sive friction.
E: INSPECTION
1) Repair or replace the faulty parts.
2) Check the caliper body and piston for uneven
wear, damage or rust.
3) Check the rubber parts for damage or deteriora-
tion.
(1) Piston
(2) Piston boot
(1) Piston
(2) Piston boot
(3) Caliper body
(4) Piston seal
BR-00242
(1)
(2)
BR-00243
(1)
(2)
(3)
(4)
(1) Pin boot
(2) Lock pin or guide pin
(3) Grease applied area
BR-00362
(1)
(2)
: (3)
BR-24
Rear Brake Pad
BRAKE
5. Rear Brake Pad
A: REMOVAL
1. BREMBO TYPE
1) Lift up the vehicle, and then remove the rear
wheels.
2) Remove clips (1).
3) Remove the pad pins (1) and cross spring (2).
4) Spread apart the pads using a pair of wrenches
and push back the piston.
5) Remove the pads.
2. EXCEPT FOR BREMBO TYPE
1) Lift up the vehicle, and then remove the rear
wheels.
2) Remove the brake hose bracket.
3) Remove the caliper bolt.
4) Raise the caliper body and support it.
NOTE:
Do not disconnect the brake hose from the caliper
body.
5) Remove the pads.
BR-00698
(1)
BR-00699
(1)
(2)
BR-00700
RS-00264
BR-00660
BR-00032
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