Models With Coil Springs
- Caster on Bronco and F150 4WD models is adjusted by caster adjustment plate. See Fig 1
. The adjustment plate positions axle radius arm to provide a range of caster adjustment in 1/2 degree increments. For caster side-to-side difference up to 1 1/2 degrees only low caster requires adjustment to positive 1 1/2 degrees.
Courtesy of FORD MOTOR CO.
- For differences more than 1 1/2 degrees, both sides require adjustment, low caster positive 1 1/2 degrees and high caster negative 1 degree. To adjust caster, raise and support vehicle on a frame type hoist. Support axle arm on side to be adjusted.
- Remove and discard self-tapping screw that retains caster adjustment plate to radius arm. Loosen nut and bolt retaining axle arm to frame pivot, two bolts retaining front axle radius arm bracket to axle arm and bolt retaining bracket to axle arm and radius arm.
- To increase caster, insert pry bar in hole at rear of axle arm. Push pry bar forward to rotate axle shaft forward. Rotate caster adjustment plate outboard.
- To decrease caster, insert pry bar in hole at front slot in axle arm. Push pry bar rearward to rotate axle arm rearward. Rotate caster adjustment plate inboard.
- Keep pry bar pressure on axle arm while aligning caster adjustment plate hole and installing new No. 6 self-tapping screw in radius arm and tightening bolt retaining bracket to axle arm and radius arm to 320-340 Ft. lbs. (434-461 N.m.).
- Tighten bolts retaining front axle radius arm bracket to axle to 20-26 Ft. lbs. (27-35 N.m.). With axle arm supported, tighten bolt retaining axle arm to frame pivot to 120-150 Ft. lbs. (163-203 N.m.).