Page 1241 of 2890
E: ASSEMBLY
1) Clean caliper body interior using brake fluid.
2) Apply a coat of brake fluid to piston seal and fit piston
seal in groove on caliper body.
3) Apply a coat of brake fluid to the entire inner surface of
cylinder and outer surface of piston.
4) Insert piston into cylinder.
CAUTION:
Do not force piston into cylinder.
5) Apply a coat of specified grease to boot and fit in groove
on ends of cylinder and piston.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
G4M0373
6) Install the piston boot to the caliper body, and attach
boot ring.
G4M0390
7) Apply a coat of specified grease to guide pin, outer
surface, sleeve outer surface, cylinder inner surface, and
boot grooves.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
8) Install guide pin boot on caliper body.
9) Install lock pin boot on caliper body and insert lock pin
sleeve into place.
G4M0375
36
4-4SERVICE PROCEDURE
2. Rear Disc Brake
Page 1242 of 2890

F: INSTALLATION
1) Install disc rotor on hub.
2) Install support on back plate.
Tightening torque:
52±6 N⋅m (5.3±0.6 kg-m, 38.3±4.3 ft-lb)
CAUTION:
Always replace the pads for both the left and right
wheels at the same time. Also replace pad clips if they
are twisted or worn.
A wear indicator is provided on the inner disc brake
pad. If the pad wears down to such an extent that the
end of the wear indicator contacts the disc rotor, a
squeaking sound is produced as the wheel rotates. If
this sound is heard, replace the pad.
Replace pads if there is oil or grease on them.
3) Apply thin coat of PBC GREASE (Part No. 003607000)
to the frictional portion between pad and pad clip.
G4M0363
4) Install pads on support.
5) Install caliper body on support.
Tightening torque:
20±4 N⋅m (2.0±0.4 kg-m, 14.5±2.9 ft-lb)
6) Connect brake hose.
Tightening torque:
18±3 N⋅m (1.8±0.3 kg-m, 13.0±2.2 ft-lb)
CAUTION:
The brake hose must be connected without any
twist.
Replace brake hose gaskets with new ones.
7) Bleed air from brake system.
37
4-4SERVICE PROCEDURE
2. Rear Disc Brake
Page 1243 of 2890
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)
38
4-4SERVICE PROCEDURE
3. Rear Drum Brake
Page 1244 of 2890
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.
39
4-4SERVICE PROCEDURE
3. Rear Drum Brake
Page 1245 of 2890
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.
40
4-4SERVICE PROCEDURE
3. Rear Drum Brake
Page 1246 of 2890
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.
41
4-4SERVICE PROCEDURE
3. Rear Drum Brake
Page 1247 of 2890

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)
42
4-4SERVICE PROCEDURE
3. Rear Drum Brake
Page 1248 of 2890

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.
43
4-4SERVICE PROCEDURE
3. Rear Drum Brake