Isuzu N-Series. Manual — part 149
WHEELS AND TIRES 3E-9
Wheels
Replacement
Damaged wheels and wheels with excessive run-out
must be replaced.
Wheel Run-out at Rim
1.5 mm (0.059 in) or less
Caution:
Wheel repairs that use welding, heating or preening are
not permitted. Replace wheel lug nuts if they are bent,
dented, have excessive lateral or radial run-out, leak air
through welds, have elongated bolt holes, will not stay
tight, or if they are heavily rusted.
NPR75
195/85R16
195/85R16
588 (6.00, 85)
588 (6.00, 85)
205/75R17.5
205/75R17.5
750 (7.65, 108.7)
750 (7.65, 108.7)
215/75R17.5
215/75R17.5
600 (6.00, 85)
600 (6.00, 85)
215/75R16C
215/75R16C
525 (5.36, 76)
525 (5.36, 76)
NPR77
195/75R16C
195/75R16C
475 (4.75, 68)
475 (4.75, 68)
NPS71
7.50R16-12PR
7.50R16-12PR
637 (6.50, 92)
637 (6.50, 92)
NPS75
8.5R17.5
8.5R17.5
625 (6.4, 90.6)
625 (6.4, 90.6)
NQR66
7.50-16-14PR
7.50-16-14PR
637 (6.50, 92)
637 (6.50, 92)
8.25-16-14PR
8.25-16-14PR
564 (5.75, 82)
564 (5.75, 82)
8.25-16-12PR
8.25-16-12PR
490 (5.00, 71)
490 (5.00, 71)
NQR70
7.50-16-14PR
7.50-16-14PR
637 (6.50, 92)
637 (6.50, 92)
215/75R17.5
215/75R17.5
600 (6.00, 85)
600 (6.00, 85)
7.50-16-10PR
7.50-16-10PR
515 (5.25, 75)
515 (5.25, 75)
7.50R16-10PR
7.50R16-10PR
564 (5.75, 82)
564 (5.75, 82)
7.50R16-12PR
7.50R16-12PR
637 (6.50, 92)
637 (6.50, 92)
NQR71
7.50-16-14PR
7.50-16-14PR
637 (6.50, 92)
637 (6.50, 92)
8.25-16-14PR
8.25-16-14PR
564 (5.75, 82)
564 (5.75, 82)
NQR71
8.25-16-12PR
8.25-16-12PR
490 (5.00, 71)
490 (5.00, 71)
NQR71
(For GCC)
215/75R17.5
215/75R17.5
600 (6.00, 85)
600 (6.00, 85)
NQR75
7.50-16-14PR
7.50-16-14PR
637 (6.50, 92)
637 (6.50, 92)
215/75R17.5
215/75R17.5
600 (6.00, 85)
600 (6.00, 85)
225/70R19.5
225/70R19.5
850 (8.50, 122)
850 (8.50, 122)
7.50-16-10PR
7.50-16-10PR
515 (5.25, 75)
515 (5.25, 75)
7.50-16-12PR
7.50-16-12PR
588 (6.00, 85)
588 (6.00, 85)
7.50R16-10PR
7.50R16-10PR
564 (5.75, 82)
564 (5.75, 82)
7.50R16-12PR
7.50R16-12PR
637 (6.50, 92)
637 (6.50, 92)
Tire size
Tire inflation pressure
kPa (kg/cm
2
, psi)
Vehicle model
Front
Rear
Front
Rear
3E-10 WHEELS AND TIRES
General Balance Procedure
Deposits of mud, etc. must be cleaned from the inside of
the rim.
The tire should be inspected for the following: match
mount paint marks, bent rims, bulges, irregular tire wear,
proper wheel size and inflation pressure. Then balance
according to the equipment manufacturer’s recommen-
dations.
There are two types of wheel and tire balance.
Static balance is the equal distribution of weight around
the wheel.
Assemblies that are statically unbalanced cause a
bouncing action called tramp. This condition will eventu-
ally cause uneven tire wear.
Dynamic balance is the equal distribution of weight on
each side of the wheel center-line, so when the tire
spins, there is no tendency for the assembly to move
from side to side. Assemblies that are dynamically un-
balanced may cause shimmy.
Warning:
WARNING:
STONES SHOULD BE REMOVED FROM THE TREAD
TO AVOID OPERATOR INJURY DURING SPIN BAL-
ANCING AND TO OBTAIN A GOOD BALANCE.
Balancing Wheel and Tire
On-Vehicle Balancing
On-Vehicle balancing methods vary with equipment and
tool manufacturers. Be sure to follow each manufactur-
er’s instructions during balancing operation.
Off-Vehicle Balancing
Most electronic off-vehicle balancers are more accurate
than the on-vehicle spin balancers. They are easy to use
and give a dynamic balance. Although they do not cor-
rect for drum or disc unbalance (as on vehicle spin bal-
ancing does), they are very accurate.
Legend
A. Corrective weights
1. Heavy spot wheel tramp
2. Add balance weights here
3. Center line of spindle
N3A0437E
N3A0438E
Legend
A. Corrective weights
1. Heavy spot wheel shimmy
2. Add balance weights here
3. Center line of spindle
N3A0439E
WHEELS AND TIRES 3E-11
N3A0440E
International Service & Parts
Tokyo, Japan
WORKSHOP MANUAL
N-SERIES
PROPELLER SHAFT AND AXLE
SECTION 4
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