Subaru 1600 Service Manual page 434

SUSPENSION, WHEELS AND AXLES
There are various ways to correct
wheel unbalance. To correct precisely
wheel unbalance, use wheel balancer.
Wheel should be statically and dynam-
ically balanced.
w,w'
F,F'
Amount of unbalance
Centrifugal force resulting
from unbalance
F' A 16·042
Fig.9-127 Wheel unbalance
When operating a wheel balancer, be
careful of the handling.
I) Correctly install hub nut. The
balancer shaft must be aligned with
the center of wheel to be corrected.
2) Firmly seat wheel on arbor.
3) Handle the disc wheel fitting sec-
tion of balance weight carefully
because it is easily damaged.
4) After installing balance weight,
position it in the groove of disc
wheel.
5) Use genuine balance weights.
~---~------
Parts No.
fur steel rim
--'~'-------'--
723141010
723141020
723141030
723141040
723141050
723141070
723141080
723141090
723141100
723141 I 10
Weight
10 g (0.35 oz)
20 g (0.71 oz)
30g (1.060z)
40 g (1.41 oz)
50 g (J
.76 oz)
5g (0.180z)
15 g (0.53 oz)
25 g (0.88 oz)
35 g (1.23 oz)
45 g (1.59 oz)
Allowable dynamic unbalance
12 g (0.42 oz) at rim flange
A16·043
Fig.9-128 Installing balance weight
6. Installation
I) Fit wheel over drum bolts, and
thread on four wheel nuts with a
wheel nut wrench.
NOTE:
a. Do not use air impact tool to
tighten the wheel nuts.
b. Tighten the wheel nuts in the order
. as shown.
OM-534
Fig. 9-129
c. When tightening wheel nuts, do not
apply oil to wheel nuts th read sec-
tion of bolts nor tapered seats of
wheels.
2) Lower vehicle slowly by turning
the jack handle.
3) Sufficiently tighten wheel nuts in
the above-mentioned sequence.
Torque
78-98N·m
(8.0 - 10.0 kg-m,
58 - 72 ft-Ib)
9-39
NOTE:
When replacing or reinstalling wheel,
retighten wheel nuts to the specified
torque after first 1,000 km (600 miles)
running.
7. Adjusting Air
Pressure
As shown in table on page 9-4, air
pressure must be adjusted to the pre-
scribed value when tires are cool, or
before starting vehicle, as air pressure
increases as tire temperature rises
during vehicle operation. This rise
amounts to an increase of up to 20%
at times, and at such a high pressure
the ride is uncomfortable, abnormal
wear is promoted, various forms of
damage may result, steering instability
is likely, along with insufficient
braking, etc.
On the other hand, exceSSively low
air pressure in tires may result in
abnormal wear, various forms of
damage, loss of drive power, increased
fuel consumption, etc. .
Tire air pressure must be adjusted in
accordance with these conditions.
8. Tire Rotation
If tires are maintained at the same
positions for a long period of time,
uneven wear results. Therefore, they
should be periodically rotated.
This lengthens service life of tires.
A16-210
Fig. 9-130 Order of tire rotation