GMC 1975 Motorhome Operating Manual page 83

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C
SIX WHEEL PATTERN
SEVEN WHEEL PATTERN
Tire Rotation Diagram
affects vehicle control and stopping ability. To
reduce the possibility of traction loss, the follow-
ing precautions should be observed :
1 . Slow down during rain-storms or when
roads are slushy.
2 . Slow down if road has standing water or
puddles.
3 . Replace tires when tread wear indicators
are visible.
4 . Keep tires properly inflated .
Snow Tires
If the vehicle is expected to encounter muddy
or snowy driving conditions it is recommended
that front driving wheels be equipped with mud
and snow type tires .
If you equip your vehicle with mud and snow
tires, they should be of the same size, load range,
and construction as original equipment tires. It
is recommended that vehicle speeds be limited
to a maximum of 75 mph if mud and snow tires
are installed.
Tire Wear and Rotation
Uneven or abnormal tire wear is usually the
result of incorrect inflation pressure, improper
wheel alignment, wheels being out-of-balance, or
poor driving habits . Under-inflation, over-infla-
77
2
Tightening Wheel Stud Nuts
Wheel Stud Tightening Sequence
tion, incorrect toe or camber and fast cornering
produce different types of abnormal wear which
can be diagnosed by your dealer.
To equalize wear it is recommended that the
tires be rotated every 6,000 miles (or sooner if
irregular wear develops) as shown.
NOTE:
It is recommended that disc brake
pads be inspected for wear whenever tires are
rotated.
The original equipment tires incorporate
built-in tread wear indicators to assist you in
determining when your tires have worn to the
point of needing replacement . These indicators
appear as 1
/ 2
-inch wide bands when tire tread
depth is Y16-inch or less. When the indicators
appear in two or more adjacent grooves, tire re-
placement due to tread wear is recommended .
When the vehicle is new or after wheels have
been replaced, it is the owner's responsibility to
check wheel stud nuts at 500 miles and after
every wheel removal thereafter. Nuts should be
tightened to 250 foot-pounds torque in sequence
shown.

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