Isuzu N-Series. Service manual — part 111
SERVICE INFORMATION 00-17
• Rigid Suspension
• NPS
• Wishbone Suspension
Adjustment
1. Loosen the lock nuts on the tie rod or outer truck
rod ends.
2. Adjust length of the tie rod by turning the connect-
ing rod on outer truck rod.
3. Tighten the lock nuts to specified torque.
Tighten:
• Lock nut to
Rigid Suspension, NPS: 113 N
⋅m (11.5 kg⋅m / 183
lb
⋅ft)
Wishbone Suspension: 167 N
⋅m (17.0 kg⋅m / 123
lb
⋅ft)
• Rigid Suspension
N3A0012E
N3A0013E
N3A0014E
N3A0015E
00-18 SERVICE INFORMATION
• NPS
• Wishbone Suspension
Turning Radius
1. Position a suitable piece of wood equivalent in
thickness to the turning radius gauge under each
rear wheel.
2. Position each front wheel on a turning radius
gauge by aligning the tire center line with the cen-
ter of the turning radius gauge.
3. Turn the steering wheel clockwise or counterclock-
wise until the front wheels are locked.
Notice:
Turn the steering wheel with the brake pedal depressed
using brake pedal pusher.
Reading of the turning radius gauge directly indicates
the steering angle.
Steering Angle
N3A0016E
N3A0017E
Wishbone Suspension Model
(deg.)
Vehicle Model
Outer
Inner
NKR (7.00-15 Tire)
35.0
38.0
Rigid Suspension Model
(deg.)
Vehicle Model
Outer
Inner
NHR
33.0
37.5
NKR (7.00-15 Tire)
29.5
38.5
NKR (7.00-16 Tire)
27.9
35.5
NPR (7.00-16 Tire)
35.0
47.5
NPR, NQR (7.50-16 Tire)
32.7
42.5
NQR (8.25-16 Tire)
30.0
36.5
NPS
29.8
37.5
N3A0018E
N3A0018E
SERVICE INFORMATION 00-19
Adjustment
1. Loosen the lock nuts on the steering knuckle or the
axle case.
2. Adjust projecting height of the stopper bolts.
3. Tighten the lock nuts to specified torque.
Tighten:
• Stopper bolt to
Rigid suspension: 186 N
⋅m (19.0 kg⋅m / 137 lb⋅ft)
NPS: 49 N
⋅m (5.1 kg⋅m / 36 lb⋅ft)
Wishbone suspension: 82 N
⋅m (8.4 kg⋅m / 61 lb⋅ft)
• Rigid Suspension
• NPS
• Wishbone Suspension
Camber Angle
All Model except NPS
Toe-in can be checked on the gauge simultaneously.
1. When inspection of turning radius is completed,
calibrate the scale of the turning radius gauge to
zero.
2. Remove the front hub cap.
Install camber, caster and king pin inclination
gauge on end of the knuckle spindle horizontally.
Notice:
When removing hub cap, take care so as not to cause
damage to gauge fitting face at end of the spindle. If end
of the spindle has been scratched or damaged, correct
before setting the gauge.
N3A0020E
N3A0021E
Legend
1. Camber angle
N3A0022E
N3A0023E
00-20 SERVICE INFORMATION
NPS
Remove the free wheel hub lock cover assembly, then
install gauge adapter on end of the knuckle spindle. In-
stall camber, caster and king pin inclination gauge on
end of gauge adapter.
Gauge Adapter: 5-8840-2188-0
3. Reading of the camber scale directly indicates the
camber angle (1).
• NHR, NKR, NPR and NQR
• NPS
Caster Angle and King Pin Inclination
The caster angle and king pin inclination can be
checked on the gauge simultaneously.
1. When inspection of camber angle is completed,
calibrate the scale of the turning radius gauge to
zero and turn the steering wheel clockwise (coun-
terclockwise for checking caster angle (1) and king
pin inclination (2) on the left side front wheel) until
the front wheels are steered 20 degrees from the
straight-ahead position.
• Rigid Suspension
Legend
1. Camber angle
2. Gauge adapter
3. Wheel alignment tester
Camber Angle
(deg.)
NHR Rigid Suspension
1
°15′±45′
Rigid Suspension (except NHR)
0
°15′±45′
Wishbone Suspension, NPS
0
°15′±45′
N3A0024E
N3A0025E
N3A0026E
N3A0027E
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