Removal
1. Remove hub and knuckle assembly from vehicle. See HUB & KNUCKLE ASSEMBLY under REMOVAL & INSTALLATION. Using
Knuckle Puller (T87C-1104-A), or a press and bearing puller, remove drive hub/rotor assembly from steering knuckle/dust shield
assembly.
2. Remove bearing preload spacer from hub. Spacer is preselected to provide correct bearing preload. Ensure correct spacer is installed
during reassembly. Install hub/rotor assembly in a vise. Scribe alignment marks on hub and rotor for reassembly reference.
3. Remove rotor attaching bolts and rotor. Use Bearing Splitter (D84L-1123-A), Shaft Protector (D80L-625-2) and a press, or Bearing
Puller (D80L-927-A) and Puller Attachment (D84L-1123-A) to remove outer bearing from wheel hub. Remove and discard outer and
inner grease seals. Using Bearing Puller (T77F-1102-A) and Slide Hammer (T-50T-100-A), remove races from steering knuckle. See
Fig. 3
.
Fig. 3: Front Wheel Bearing & Hub Assembly
Courtesy of FORD MOTOR CO.
Inspection
Thoroughly clean all parts in solvent. Check bearings, hub, knuckle and rotor dust shield for excessive wear or damage. If new bearing is being
installed, check bearing preload. See BEARING PRELOAD.
Bearing Preload
1. To check and adjust preload, Spacer Selector Set (T87C-1104-B) must be used. Prior to assembling hub/rotor assembly into steering
knuckle, install spacer selector into steering knuckle and clamp tool in vise. Tighten center bolt, in increments, to 36, 72, 108 and
finally 145 ft. lbs. (49, 98, 147 and 196 N.m). Each time center bolt is tightened, seat the bearings by rotating steering knuckle by hand.
2. Remove steering knuckle from vise. Reinstall steering knuckle in vise, clamping it where shock absorber mounts. Using an INCH lb.
torque wrench, measure torque required to turn center bolt. Ensure torque reading is taken just as wrench starts to rotate.
3. Spacer thickness is correct if torque wrench indicates 2.21-10.44 INCH lbs. (.25-1.8 N.m). If measurement indicates less than 2.21
INCH lbs. (.25 N.m), a thinner spacer must be installed. If measurement indicates more than 15.93 INCH lbs. (1.8 N.m), a thicker spacer
must be installed.
4. Bearing spacers are available in 21 thicknesses, in .0016" (.040 mm) increments. Spacer No. 1 is thinnest and No. 21 is thickest. See
PRELOAD SPACER AVAILABILITY table. Changing spacer thickness one increment will change bearing preload 1.7-3.5 INCH lbs.
(.2-.4 N.m). Ensure correct spacer is installed and preload is within specification. Remove spacer selector set.
PRELOAD SPACER AVAILABILITY NOTE:Rem oval of press-fitted dust shield from steering knuckle is not part of norm al bearing service. Dust
shield should not be rem oved from steering knuckle unless it is being replaced.
Stamped Mark On SpacerIn. (mm)
10.2474 (6.285)
20.2490 (6.325)
30.2506 (6.365)
40.2522 (6.405)
50.2537 (6.445)
60.2553 (6.485)
70.2569 (6.525)
80.2585 (6.565)
90.2600 (6.605)
100.2616 (6.645)
110.2632 (6.685)
120.2648 (6.725)
Page 3 of 5 MITCHELL 1 ARTICLE - SUSPENSION - FRONT 1991-92 SUSPENSION Front
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