Isuzu N-Series. Manual - part 219

HYDRAULIC BRAKES 5A-35

2. Place the brake shoe assembly in the inside brake

drum.

3. Move the brake shoe assembly around the inside

brake drum.
Check for uniform contact between the brake lining
and the brake drum.

4. Correct any areas having poor contact with sand-

paper.

5. Repeat Steps 1 through 4 until the contact between

the brake lining and the brake drum is perfect.

Installation

1. Back Plate and Oil Shield cover

Tighten the back plate and oil shield cover bolts to
the specified torque.

Tighten:
Back plate and oil shield cover bolts to

NPS model: 98 N

⋅m (10.0 kg⋅m / 72 lb⋅ft)

NQR model: 157 N

⋅m (16.0 kg⋅m / 116 lb⋅ft)

Others: 88 N

⋅m (9.0 kg⋅m / 65 lb⋅ft)

2. Wheel Cylinder Assembly

Tighten the wheel cylinder assembly bolts to the
specified torque.

3. Brake Flexible Hose and Pipe

Tighten the brake pipe flare nuts to the specified
torque.

Tighten:
Brake pipe flare nuts to 16 N

⋅m (1.6 kg⋅m / 12 lb⋅ft)

Notice:
Take care not to twist the piping and the flexible hose.

N5A0142E

N5A0145E

Wheel Cylinder Assembly Bolt Torque

N

⋅m (kg⋅m/lb⋅ft)

Drum Inside 

Dia. mm (in)

Lining Width 

mm (in)

—

279.4 (11.00)

60 (2.36)

27 (2.8/20)

300.0 (11.81)

75 (2.95)

34 (3.5/25)

320.0 (12.60)

43 (4.4/32)

320.0 (12.60)

100 (3.94)

74 (7.5/54)

320.0 (12.60)

120 (4.72)

94 (9.6/69)

N5A0146E

5A-36 HYDRAULIC BRAKES

4. Brake Shoe and Return Spring (Two Leading

Type)
1) Before setting the brake shoes, apply a thin

coat of molybdenum disulfide grease to the
back plate portions (1) contacting the brake
shoe edge as shown in the illustrations.

2) Apply a coat of molybdenum disulfide grease to

the wheel cylinder parts contacting the shoe
(2).

3) Set the brake shoe assembly to the cylinder ad-

justing screw at the brake shoe small angle
end.
Do not install it at the round end to the adjusting
screw.

4) Install the brake shoes and the return springs to

the wheel cylinders.
Keep the lining surface clean.

5. Brake Shoe and Return Spring (Dual Two Leading

Type)
1) Before setting the brake shoes, apply a thin

coat of molybdenum disulfide grease to the
back plate portions (1) contacting the brake
shoe edge as shown in the illustrations.

2) Apply a coat of molybdenum disulfide grease to

the wheel cylinder parts contacting the brake
shoe (2).

3) Set the brake shoe assembly to the cylinder ad-

justing screw at the brake shoe small angle
end.
Do not install it at the round end to the adjusting
screw.

N5A0147E

N5A0148E

N5A0149E

N5A0150E

HYDRAULIC BRAKES 5A-37

4) Install the brake shoes and the return springs to

the wheel cylinders.
Keep the brake lining clean.

6. Shoe Holding Spring, Cup and Pin

1) Before installing the holding pin, apply a coat of

molybdenum disulfide grease to the holding
cup seating faces (1) contacting the brake
shoe.

2) After installation of the pins, cups and the

springs, make sure the pin (2) seats to the cup
(3) properly.

After assembly, adjust the lining clearance and air
bleeding the brake, referring to “SERVING” in Sec-
tion 00 of this section.

N5A0151E

N5A0152E

5A-38 HYDRAULIC BRAKES

Rear Drum Brake Assembly (Except Drum Inside Diameter 370 mm)

Removal

1. Shoe Holding Spring, Cup and Pin
2. Brake Shoe Return Spring
3. Brake Pipe
4. Wheel Cylinder Assembly
5. Back Plate

Store all of the removed parts in a clean part tray.

With Auto-adjuster
If the brake drum has step wear or the brake drum edge
is corroded, it will be difficult to remove the brake drum.
The following procedure will make brake drum removal
easier.

Legend

1. Shoe holding spring, cup and pin

4. Wheel cylinder assembly

2. Brake shoe and return spring

5. Back plate

3. Brake pipe

N5A0153E