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
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