TRUCK SERVICE MANUAL
Checking and Correcting Front Wheel Toe-ln
No change should be made in toe-in until the other factors of front wheel alignment are known to be within specifications.
Incorrect toe-in results in excessive tire wear caused by side slippage. When attempting to determine the cause of exit excessive
wear, first check camber, caster and king pin inclination in the order named. (King pin inclination is a reference and not adjustable in
Turn the front wheels to the exact straight-ahead position. When setting toe-in adjustment, the front suspension must be
neutralized; that is, all component parts must be in the same relative position when making the adjustment as they will be in a normal
static unladen position. To neutralize the suspension, the vehicle must be rolled forward 12 to 15 feet. By rolling the vehicle forward,
all tolerances in the front suspension are taken up and the suspension is then in normal static unladen position. Neutralizing the front
suspension is extremely important, as after the vehicle has been jacked up in order to scribe the tires, the front wheels will not return
to the normal static unladen position due to the tires gripping the floor surface when the vehicle is lowered.
The toe-in specifications listed are designed to yield a "0" degree toe-in condition in normal operations with payload.
Before attempting front alignment procedures observe the following:
Caster angles are for an unladen (no payload) vehicle. If frame is not level, the frame angle must be added to -front high -
or subtracted from - front low - the caster angle to obtain true caster reading.
Caster angle difference between left and right wheel not to exceed 0 deg. 30 minutes.
Toe-In dimension may be measured from center of tread, or from inside of tire.
Tolerance unless otherwise noted:
Caster - plus or minus 0 deg. 30 minutes except Scout II & Cargostar which is plus or minus 1 deg. 0 min.
Toe-In plus or minus 1/16 inch.
Camber - plus or minus 0 deg. 30 minutes.
After the axle model "P/S" = Power Steering
"M/S" = Manual Steering
CTS-2696S Page 3
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