Isuzu N-Series. Manual - part 276

5A4-78 ABS/ASR

Sensor Rotor (Front Wheel)

Components

Legend

1. Speed sensor (model with rigid suspension)
2. Hub cap
3. Cotter pin
4. Hub nut
5. Thrust washer

6. Outer bearing
7. Hub & rotor assembly
8. Inner bearing
9. Sensor rotor

10. Disc caliper assembly

Removal

CAUTION:

• Hold the brake hose and the caliper assembly with

wire or the like to prevent them from dropping, to
stand clear from the service work. Do not bend the
hose sharply or stretch it to the limit.

• Remove the brake hose if necessary. If to be re-

moved, be careful to prevent the brake fluid from

flowing out and protect it from intrusion of foreign
materials.

1. Remove the disc brake caliper. (Model with disc

brake)

N5A2048E

ABS/ASR 5A4-79

2. Guard (NPR with disc brake)

• Remove the guard.

3. Speed sensor (NPS)

• Remove the head section of the speed sensor

from the knuckle.

4. Hub cap (NPR)

• Remove the hub cap.

5. Free wheel hub assembly (NPS)

• Remove the free wheel hub assembly.

6. Cotter pin (NPR)

• Remove the cotter pin.

7. Lock washer (NPS)

• Remove the lock washer and the fixing screw.

8. Hub nut

• Remove the hub nut.

9. Trust washer (NPR)

• Remove the thrust washer.

10. Hub & rotor assembly

11. Outer bearing inner race
12. Sensor rotor (front wheel)

• Use a puller to take out the sensor rotor.

Installation

1. Sensor rotor (front wheel)

• Press-fit the new sensor rotor with a bench

press around the circumference until it con-
tacts.

2. Hub & rotor assembly

• Fill the outer bearing with grease (Besco L-2),

and install it to the hub.

CAUTION:

Use new oil seal.

3. Outer bearing inner race
4. Trust washer (NPR)

• Install the thrust washer.

5. Hub nut

• Install the hub nut.

N5A2049E

N5A2050E

N5A2051E

N5A2052E

5A4-80 ABS/ASR

CAUTION:

After installing the thrust washer and the hub nut, adjust
the hub bearing preload.

Hub bearing preload adjustment

• Tighten the hub nut till the hub no longer be turned,

and then loosen it completely.

• Turn the hub to make the bearing seated.
• Attach a spring balance to the wheel pin. While

pulling the it tangentially, tighten the hub nut so that
the hub rotates with the specified value. 

• For hub bearing preload, refer to “FRONT AXLE” in

Section 4C.

6. Cotter pin (NPR)

• After preload adjustment, install the cotter pin. If

the pin hole does not match the groove on the
nut, adjust them by turning minimum to the
tightening direction.

7. Lock washer (NPS)

• Install the pawl to the cutout of the spindle se-

curely, and tighten with the screw.

Tighten:

Lock washer to 10 N

⋅m (1.0 kg⋅m / 7.4 lb⋅ft)

 

8. Hub cap

• Fill the hub cap with grease (Besco L-2), and

drive it in to the hub.

9. Free wheel hub assembly (NPS)

• Install the free wheel hub assembly.

CAUTION:

Be sure to adjust the drive shaft axial play.

10. Speed sensor (NPS)

• Install the head section of the speed sensor to

the knuckle and tighten the bolt to the specified
torque.

Tighten:

Speed sensor to 22 N

⋅m (2.2 kg⋅m / 16.2 lb⋅ft)

11. Guard (NPR with disc brake)

• Install the guard.

Tighten:

Guard to 37 N

⋅m (3.7 kg⋅m / 27.3 lb⋅ft)

12. Disc brake caliper assembly (Model with disc

brake)

• Install the disc brake caliper assembly.

Tighten:

Disc brake calper to 220 N

⋅m (22.5 kg⋅m / 162.3 lb⋅ft)

N5A2053E

N5A2054E

ABS/ASR 5A4-81

N5A2055E