Isuzu N-Series. Service manual — part 222
HYDRAULIC BRAKES 5A-47
Drum Inside Diameter 370.0 mm (14.57 in)
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.
1. Remove the rubber cover from the brake lining
clearance adjusting hole and auto-adjuster lever
release hole.
2. Remove the adjust hole cover and adjuster lever
release hole cover.
3. Using
φ5 mm Phillips screwdriver put it into the ad-
juster lever release hole and then push up the ad-
juster lever.
4. Put the flathead screwdriver into the adjuster hole
while push up the adjuster lever.
Legend
1. Corroded portion
Legend
1. Adjuster lever release hole cover
2. Adjuster hole cover
N5A0128E
N5A0412E
Legend
1. Adjuster lever release hole
N5A0413E
N5A0414E
5A-48 HYDRAULIC BRAKES
5. Turn the adjuster gear to the marked arrow
“LOOSE” on the backing plate.
Inspection
• All components for wear or damage. Replace as
necessary.
Measurement
Set the return spring as it is installed, and measure the
tension.
• Return spring tension.
Installation
1. Wheel cylinder assemblies.
Tighten:
Wheel cylinder mounting bolts to 120 N
⋅m (12.2 kg⋅m /
89 lb
⋅ft)
2. Back Plate.
Tighten:
Mounting plate bolts to 157 N
⋅m (16.0 kg⋅m / 116 lb⋅ft)
3. Brake pipes and hoses.
Tighten:
Brake pipe nuts to 15 N
⋅m (1.5 kg⋅m / 11 lb⋅ft)
4. Shoe and lining assemblies.
5. Shoe return spring using a return spring plier.
Return spring plier: 9-8522-0026-0
6. Holder nuts.
• Brake holder nut clearance.
– Turn nut (1) clockwise until shoe comes into
contact with the bolts (2).
– Turn nut (1) counterclockwise 1/3 turn. Back
off the nut until the hole in the holding pin
lines up with the nearest slot in the nut within
1/6 turn, and install split pin.
– Check to see if clearance between bolt and
shoe in 0.3 — 0.5 mm (0.012 — 0.020 in). If
Legend
1. Adjuster gear
N5A0415E
N5A0133E
Free Length mm (in)
209.3 (8.24)
Set Length mm (in)
226 (8.90)
Set Load N (kg/lb)
292.2 — 357 (29.8 — 36.4
/ 65.7 — 80.2)
N5A0447E
HYDRAULIC BRAKES 5A-49
clearance is not specified, it should be read-
justed.
Caution:
Do not loosen the nuts on the shoe hold bolts during the
operation.
7. Cotter pin.
Use a new cotter pin. Be sure to bend back the legs
of the pin.
8. Hub and drum assembly and wheel and tire as-
sembly. Adjust wheel bearings.
• Refer to Section 3E WHEELS AND TIRES.
• Refer to Section 4C FRONT AXLE and Section
3C FRONT SUSPENSION.
• Refer to Section 4B REAR AXLE.
Adjustment
1. After reassembling the brake assembly, adjust the
brake lining external diameter to 369.3 — 369.8
mm (14.54 — 14.56 in) by turning the wheel cylin-
der adjuster gear.
If the measurement at 1, 2 and 3 point are within
the range of specified value, brake drum can be in-
stalled easily.
Notice:
Be sure to push up the auto-adjuster lever. Failure to do
so will result in damage to the teeth of auto-adjuster-
gear.
Take care not to damage the rubber boot with the screw
driver.
2. Install the brake drum.
3. Rotate the brake drum and depress the brake ped-
al as far as possible.
Legend
1. Nut
2. Bolt
3. Clearance 0.3 — 0.5 mm (0.012 — 0.020 in)
2
3
1
N5A0416E
2
3
1
N5A0417E
5A-50 HYDRAULIC BRAKES
Brake Pedal and Control
Brake Vacuum Booster and Brake Pedal Assembly
Removal
1. Instrument Panel
2. Stay
3. Defroster Nozzle and Vent Duct
4. Center Duct (NPR model only)
5. Brake and Clutch Fluid Reservoir
6. Windshield Washer Tank
For the removal procedure for above, refer to Sec-
tion 2 CAB AND FRAME.
7. Steering Cowl Assembly
Wheel remover: 5-8840-2215-0
Legend
1. Instrument panel
5. Brake and clutch fluid reservoir
2. Stay
6. Windshield washer tank
3. Defroster nozzle and vent duct
7. Steering cowl assembly
4. Center duct (NPR model only)
8. Vacuum booster and brake pedal assembly
N5A0181E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст