Hudson 1955 Rambler, Техническое и сервисное руководство

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WHEELS AND TIRES
TIRE WEAR
Abnormal tire wear can be caused by improper
inflation pressures, wheel balance, mechanical
irregularities, or misaligned front suspension.
A tire severely cupped is mainly due to loose
steering connections, loose wheel bearings, or
any excessive looseness throughout the front
suspension. An uneven brake adjustment, out-of-
round brake drums, may also cause rapid and uneven
tire wear.
A tire which is worn only on one side of the
tread is normally caused by excessive positive or
negative camber. The extent of camber wear is
largely due to the amount of camber angle in
relation to the type or shape of local road
surfaces.
Tread wear very similar in appearance may also
be caused by driving at high speeds on turns. This
is known as "Cornering" tread wear and cannot be
corrected by the changing of the camber angle.
An incorrect toe-in or toe-out adjustment will
cause one edge of the tire tread to wear to a
"feathered edge." This is noticed by a rounded
off edge on one side and sharpness on the other.
This actually means that the tire is slipping
sideways or scuffing as it travels down the road.
If the "feathered edge" is on the inner sides
of the tread, either on one or both tires, it
indicates that one or both tires have excessive
toe-in; while the same condition on the outer
sides of the treads indicate excessive toe-out.
In some instances, one front tire may indicate
toe-in wear, while the opposite tire indicates
toe-out wear. When this condition is encountered,
the steering goemetry must be checked and set to
specifications.
This condition can also be caused by bent
steering arms, with the result that the inside
wheel on both turns, either toes-in or toes-out
in excess.
Inflation Pressures
One of the most important factors in tire care is
to maintain proper inflation. In order to
maintain the correct inflation pressure, tires
should be checked when cold. The effect of three
types of inflation pressures are shown in
Figure 24.
The inflation pressure recommended by the tire
manufacturer is the most effective pressure to
use in order to maintain efficient balance,
riding comfort. tire life, and smooth steering.
FIGURE 24— Effect of Inflation Pressures
Whenever the air pressure is either greater or
less than recommended, the balance of forces in
the tire is upset. Results are abnormal wear
and premature failure.
Wheel Balance
Tire and wheel balance is very important both
for preventing excessive tire wear and for ease
in handling the car.
There are four factors involved in wheel
balance and each one must be considered.
Radial run-out is the unevenness of tread
caused by an eccentric wheel or tire (Fig. 251.
FIGURE 25— Radial Run-Out
To correctly inspect a wheel for excessive
run-out, the wheel should be mounted by means
of the mounting lug either on a hub or an
off-the-car type balancer.
The radial run-out is checked at the tire bead
seat (Fig. 26) not the outer rim of the wheel.
This run-out should not exceed .062" or 1/16"
of an inch.
BRAKES, AND WHEELS-HUBS AND DRUMS 17
Series
Wheel Size
Tire Size
Standard
Tire Pressure
Cold Front and
Rear Wheels "Hornet"
15"
7.10 x 15"
24 Lbs.
"Wasp"
15"
6.70 x 15”
14 Lbs.
"Rambler"
15"
6.40 x 15"
24 Lbs.