Excessively Tight Wheels; Separating The Tire From The Wheel; Mounting The Tire On The Wheel - GMC 1986 P-Truck Service Manual

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Figure —Tire And Wheel Assembly
To Hub/Rotor Vectoring
• This can be effective for both radial and
lateral runouts.
3. If there is some looseness in the wheel hub bolt
holes, radial runout can be reduced by loosening
the hub bolt nuts slightly, moving the wheel
position on the bolts and then retightening the
nuts.
4. Balance the tire and wheel to hub/rotor assembly.
• Compensates for any imbalance in the
brake rotor, drum, or wheel cover.

EXCESSIVELY TIGHT WHEELS

Use this procedure to remove the wheel and tire
assembly if it does not break free of the hub using a
standard removal procedure.
1. Tighten all the lug nuts on the affected wheel.
• Do not torque.
2. Raise the vehicle.
3. Loosen each nut two turns.
4. Lower the vehicle to the floor.
5. Rock the vehicle from side to side to loosen the
wheel. Or rock the vehicle from forward to reverse
allowing the vehicle to move several feet in each
direction. Apply quick, hard jabs on the brake
pedal to loosen the wheel.
. Raise the vehicle and remove the lug nuts and
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the wheel.
SEPARATING THE TIRE
FROM THE WHEEL
NOTICE: Use a tire changing machine to
demount tires. Do not use hand tools or tire
irons alone to remove the tire from the wheel.
Damage to the tire beads or wheel rim could
result.
WHEELS AND TIRES 3E-7
• Follow the tire changing machine manufacturer's
instructions to properly separate the tire from the
wheel.
MOUNTING THE TIRE ON
THE WHEEL
BIAS PLY TIRES
1. Clean the tire bead area.
2. Clean the rim bead seats with a wire brush or
coarse steel wool to remove lubricants, old
rubber, and light rust.
3. Apply an approved tire lubricant to the tire bead
area.
4. Attach the tire to the wheel.
• Use a tire changing machine. Follow the
equipment manufacturer's instructions.
CAUTION: Do not stand over tire when
inflating. The bead may break when it snaps
over the safety hump, and cause serious
personal injury. Do not exceed 275 kPa (40
psi) pressure when inflating. If 275 kPa (40
psi) pressure will not seat beads, deflate,
re-lubricate and reinflate. Overinflation may
cause the bead to break and result in personal
injury.
5. Install a valve core and inflate to the specified
pressure (figure ).
2
• The locating rings on each side of the tire
m u sti show
positioned in direct relation to the wheel (not
eccentric as compared with the rim).
. Check the bead seating.
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• Tires must be mounted and inflated in
accordance with the safety precautions
included with the tire mounting equipment.
RADIAL PLY TIRES
NOTICE: Recommended vehicle tire mounting
and inflation procedures are especially
important with radial tires. Failure to follow
these procedures can cause bead deformation
in both tube type and tubeless tires due to
incorrect bead seating. Bead deformation may
lead to chafing, lower sidewall and bead area
cracking, eccentric wear, ride vibration and
nonretreadable castings.
above the rim fla n g e s ,