1997 SUBARU LEGACY service

3. Rear Drum Brake
B4M0075A
1Air bleeder cap

2Air bleeder screw

3Boot

4Piston

5Cup

6Spring

7Wheel cylinder body

8Pin

9Plug

10Back plate
11Upper shoe return spring

12Retainer

13Washer

14Parking brake lever

15Brake shoe (Trailing)

16Brake shoe (Leading)

17Shoe hold-down spring

18Cup

19Adjusting lever

20Adjuster
21Lower shoe return spring

22Adjusting spring

23Plug
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 8±1 (0.8±0.1, 5.8±0.7)
T2: 10±2 (1.0±0.2, 7.2±1.4)
T3: 52±6 (5.3±0.6, 38.3±4.3)
43
4-4SERVICE PROCEDURE
3. Rear Drum Brake

G4M0393
A: REMOVAL
1. BRAKE DRUM AND SHOE
1) Loosen wheel nuts, jack-up vehicle, support it with rigid
racks, and remove wheel.
2) Release parking brake.
3) Remove brake drum from brake assembly.
G4M0242
NOTE:
If it is difficult to remove brake drum, remove adjusting hole
cover from back plate, and then, turn adjuster assembly
pawls using a slot-type screwdriver until brake shoe sepa-
rates from the drum.
G4M0395
4) Hold hold-down pin by securing rear of back plate with
your hand.
5) Disconnect hold-down cup from hold-down pin by rotat-
ing hold-down cup.
G4M0396
6) Disconnect lower shoe return spring from shoes.
G4M0397
7) Remove shoes one by one from back plate with
adjuster.
CAUTION:
Be careful not to bend parking brake cable excessively
when removing brake shoes.
8) Disconnect parking brake cable from parking lever.
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4-4SERVICE PROCEDURE
3. Rear Drum Brake

G4M0398
9) Remove the following:

1Retainer

2Washer

3Parking lever

4Upper shoe return spring

5Trailing shoe

6Leading shoe

7Shoe hold-down spring

8Shoe hold-down cup

9Adjusting lever

10Adjusting spring

11Adjuster

12Lower shoe return spring
G4M0399
2. BRAKE ASSEMBLY
1) Remove wheel.
2) Remove axle nut.
3) Remove brake drum
4) Unscrew the brake pipe flare nut and disconnect brake
pipe.
5) Remove hub.
G4M0400
6) Remove the bolts installing back plate, and then,
remove brake assembly.
G4M0401
3. WHEEL CYLINDER
1) Remove brake drum and shoes.
2) Unscrew brake pipe flare nut; and disconnect brake
pipe.
3) Remove the bolts installing wheel cylinder on back
plate, and remove it.
45
4-4SERVICE PROCEDURE
3. Rear Drum Brake

G4M0402
B: DISASSEMBLY
1. WHEEL CYLINDER
1) Remove right and left dust boots from wheel cylinder.
2) Remove piston, cup, spring and air bleeder screw and
cap.

1Bleeder cap

2Bleeder screw

3Spring

4Cylinder

5Cup

6Piston

7Boot
G4M0403
C: INSPECTION
1) If the inside surface of brake drum is streaked, correct
the surface. And, if it is unevenly worn, taperingly streaked,
or the outside surface of brake drum is damaged, correct
or replace it.
2) Measure the drum inner diameter.
Drum inner diameter: “L”
Standard 228.6 mm (9 in)
Service limit 230.6 mm (9.08 in)
3) Measure the lining thickness.
Lining thickness:
Standard 4.1 mm (0.161 in)
Service limit 1.5 mm (0.059 in)
4) If the deformation or wear of back plate, shoe, etc. are
notable, replace them.
5) When the shoe return spring tension is excessively
weakened, replace it, taking care to identify upper and
lower springs.
46
4-4SERVICE PROCEDURE
3. Rear Drum Brake

D: ASSEMBLY
1. WHEEL CYLINDER
Clean all parts in brake fluid. Check and replace faulty
parts.

Cup and boot for damage or fatigue

Cylinder, piston and spring or damage or rust formation
1) Assembly is the reverse order of disassembly.
G4M0404
(1) When installing the cup, use ST, apply brake fluid
to the frictional surface for smooth installation and pay
attention to cup direction.
(2) STs are available in different sizes.
CAUTION:

When replacing the repair kit, make sure that the
sizes of cylinder and cup are the same as those which
were replaced.

Use only the tool of the correct size.
ST: ADAPTER
Applicable size Part No.
17.46 mm (11/16 in) 925460000
19.05 mm (3/4 in) 926460000
CAUTION:
While assembling, be careful to prevent any metal
chip, dust or dirt from entering the wheel cylinder.
G4M0405
2) Apply rubber grease to the boot inside as shown in
Figure.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
CAUTION:
Never use brake grease.
G4M0401
E: INSTALLATION
1. WHEEL CYLINDER
Install wheel cylinder on back plate, and tighten bolts.
Tightening torque:
10±2 N⋅m (1.0±0.2 kg-m, 7.2±1.4 ft-lb)
47
4-4SERVICE PROCEDURE
3. Rear Drum Brake

G4M0407
2. BRAKE DRUM AND SHOE
1) Clean back plate and wheel cylinder.
2) Apply grease to portions indicated by arrows in Figure.
Brake grease:
Dow Corning Molykote No. 7439 (Part No.
725191460)
G4M0408
3) Apply grease to adjusting screw and both ends of
adjuster.
Brake grease:
Dow Corning Molykote No. 7439 (Part No.
725191460)
4) Connect upper shoe return spring to shoes.
G4M0409
5) While positioning shoes (one at a time) in groove on
wheel cylinder, secure shoes.
6) Connect lower shoe return spring.
7) Fix shoes by connecting hold-down cup to hold-down
pin.
G4M0400
3. BRAKE ASSEMBLY
1) Install brake assembly on housing, and tighten bolts to
install back plate.
Tightening torque:
52±6 N⋅m (5.3±0.6 kg-m, 38.3±4.3 ft-lb)
2) Install hub.
3) Connect brake pipe, and tighten brake pipe flange nut.
Tightening torque:
15
+3
2N⋅m (1.5+0.3
0.2kg-m, 10.8+2.2
1.4ft-lb)
4) Set the outside diameter of brake shoes less than 0.5
to 0.8 mm (0.020 to 0.031 in) in comparison with the inside
diameter of brake drum.
5) Install brake drum.
6) After installing brake assembly, bleed air from brake
line.
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4-4SERVICE PROCEDURE
3. Rear Drum Brake

4. Parking Brake (Rear Disc Brake)
G4M0411
1Back plate

2Retainer

3Spring washer

4Lever

5Parking brake shoe (Primary)

6Parking brake show (Secondary)

7Strut spring
8Strut

9Shoe guide plate

10Primary return spring

11Secondary return spring

12Adjusting spring

13Adjuster

14Shoe hold-down cup
15Shoe hold down spring

16Shoe hold down pin

17Adjusting hole cover
Tightening torque: N⋅m (kg-m, ft-lb)
T: 52±6 (5.3±0.6, 38.3±4.3)
G4M0412
A: REMOVAL
1) Remove the two mounting bolts to the disc brake
assembly and remove the disc brake assembly.
2) Suspend the disc brake assembly so that the hose is
not stretched.
3) Remove the disc rotor.
4) Remove shoe return spring from parking brake assem-
bly.
5) Remove front shoe hold down spring and pin with pli-
ers.
6) Remove strut and strut spring.
7) Remove adjuster assembly from parking brake assem-
bly.
8) Remove brake shoe.
9) Remove rear shoe hold-down spring and pin with pliers.
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4-4SERVICE PROCEDURE
4. Parking Brake (Rear Disc Brake)

G4M0413
10) Remove parking cable from parking lever.
11) Using a standard screwdriver, raise retainer. Remove
parking lever and washer from brake shoe.
B: INSPECTION
1) Measure brake disc inside diameter. If the disc is scored
or worn, replace the brake disc.
Disc inside diameter:
Standard
170 mm (6.69 in)
Service limit
171 mm (6.73 in)
2) Measure the lining thickness. If it exceeds the limit,
replace shoe assembly.
Lining thickness:
Standard
3.2 mm (0.126 in)
Service limit
1.5 mm (0.059 in)
CAUTION:
Replace the brake shoes on the right and left brake
assembly at the same time.
C: INSTALLATION
CAUTION:
Be sure lining surface is free from oil contamination.
Brake grease:
Dow Corning Molykote No. 7439 (Part No.
725191460)
1) Apply brake grease to the following places.

Six contact surfaces of shoe rim and back plate
packing

Contact surface of shoe wave and anchor pin

Contact surface of lever and strut

Contact surface of shoe wave and adjuster assem-
bly

Contact surface of shoe wave and strut

Contact surface of lever and shoe wave
50
4-4SERVICE PROCEDURE
4. Parking Brake (Rear Disc Brake)