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FOUR-WHEEL ALIGNMENT
The objective in a Four-wheel alignment is to adjust all four wheels until they are aligned to a
specification. This alignment is typically done to vehicles that have rear wheel adjustment
available.
The following should be completed before making any measurements or adjustments:
x
Equipment should be checked for calibration
x
The full weight of the vehicle must be on its wheels turntables in the front and slip plates in
the rear.
x
The suspension must be inspected
x
Front and rear wheel clamps must be installed
x
Run out must be completed on the all wheel clamps
x
Adjustments for caster and camber should have already been completed
NOTE: Using the procedure of the TWO WHEEL CENTERLINE ALIGNMENT
section complete the additional procedures to complete a FOUR-WHEEL
ALIGNMENT.
Four-Wheel Alignment:
1)
Adjust ALL Toe Dials to the desired setting.
2)
Make the changes necessary until the laser beam drops back into the hole and the Laser
beams going down the sides of the vehicle are even at the combi gauges.
3)
Adjust the rear suspension until the laser beams drop back into the holes on the laser
guns on both sides of the vehicle.
Note:
After making all the adjustments, your objective is to all lasers dropped in the hole of the
cross toe and the thrust angle scales. We call it “
Drop it in the hole, drop it in the hole and
drop in the hole. That completes a Four-Wheel Alignment
.”
Import Drag Cars:
On front wheel drive drag cars, after completing the four wheel alignment. Place a pair of
frame centering flags on the rear of the wheelie bar, remove the combi gauges and use the
centering flags to adjust the wheelie bar to center.
