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4
3
2
Wheel
Stud Tightening Sequence
Tightening Wheel Stud Nuts
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.
CAUTION
If any wheel experiences a single
stud
failure caused by a loose-running
wheel,
all wheel studs should be replaced.
A
loose-running wheel may cause
only one stud to break, but
severa
l
more studs may become fatigued to
t
he
point
of
failure,
but
not
actually
breaking.
Replacing only
the
broken
stud and remounting wheel
will then set the stage for a second
and possible more serious
failure.
If
holes
in
the
wheel
have
become
elongated or enlarged, replace
wheel.
64
Tighten wheel stud nuts as follows:
1 .
Install
all
nuts
loosely,
then
finger-tighten
only
the
nuts
marked
by
arrows.
2.
Tighten all nuts to specified torque in
sequence
illustrated. Never use oil or grease
on
studs or
nuts.
See IN CASE OF EMERGENCY
section
for procedure used to change tire.
FRONT WHEEL BEARING
The
front
whee
l
bearings
should
be
cleaned,
inspected
and
repacked at intervals
specified
in
the
Maintenance
Schedule
folder. This
operation
requires
special
tools
and
should
be
performed
by
your .GMC
MotorHome service outlet.
REAR WHEEL BEARING ADJUSTMENT
A periodic rear
wheel
bearing repack is
required
as
indicated
in
Maintenance
Schec.lulc folc.ler.
These bearings
should be
cleaned
and
repacked with
Lithium
Soap
Multi-Purpose
Grease
Meeting
GM
Specification 6031-M or
equivalent.
The adjustment of the bearing must be
done with the·
wheel
off the floor, and
rotating the
wheel
while tightening nut. At
this
time
make
the
torque
readings
as
follows:
1. Tighten adjusting nut with a torque
wrench
to
25-30 foot-pounds with wheel
rotating
to
ensure
that
all
parts
are
properly
seated and
threads are free
.
2.
Back off nut one-half turn.
Re-tighten
nut finger-tight.
3.
If unable
to
install
finger-tight
position,
back
then
secure
with
cotter
pin.
cotter
pin
at
off
one
slot,
4.
End
play should be .001" to .005".
Also
at
this
interval the rear suspension
control
arms should be lubricated. This is
accomplished
at
the
fittings
between
the
rear
wheels.
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