Front Axle
WHEEL BEARING AND ADJUSTMENT
Before adjusting the wheel bearings, be certain there is sufficient clearance between the
brake shoe and drum so that shoe drag will not interfere with bearing adjustment. Use a
torque wrench to make the adjustment.
Torque the adjusting nut to 50 ft. lbs. while rotating the wheel in both directions to ensure
that all bearing surfaces are in contact. Then, back off the adjusting nut 1/ 8 to 1/6 turn and
cotter pin the nut.
End play must be within the limits of .001” to .010” loose.
TOE-IN ADJUSTMENT
When checking or adjusting toe-in, the weight of the vehicle must be on the axle. The axle
is initially jacked up for the purpose of chalking and scribing the center area of each front
tire and then lowered for checking. Outriggers can be used when jacks of a capacity to
raise the vehicle are unavailable. If an adjustment is found necessary, we recommend
consulting your local distributor. Check the toe-in using the following procedure:
1.
Jack up the front axle. Use a piece of chalk to whiten the center area of both tires
around the entire circumference.
2. Position a scribe or pointed instrument against the whitened part of each tire and
rotate tires. The scribe must be held firmly in place so a single straight line is scribed
around the tire.
3. Position a full-floating turning-radius gauge plate under each wheel. Lower vehicle and
remove lock pins from gauge plates. (If full-floating turning radius gauge plates are not
available, lower vehicle and move backward and forward approximately six feet).
4. Set the sliding scale end of the trammel bar on “0” (zero) and lock in place.
T300-1_T500-1_T780
Service / Parts
450 P/N 12261-683
REVISED: January 2015
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