Front Suspension
Wheel Bearing and Wheel HubSpecial Tool(s):
Material:
Removal
All vehicles
1. With the vehicle in NEUTRAL, position it on a hoist.
Vehicles with ABS
2. Disconnect the wheel speed sensor electrical connector.
3. Remove the wheel speed sensor harness bolt.
4. Remove the 2 wheel speed sensor harness bolts.
5. Remove the wheel speed sensor harness-to-wheel knuckle bolt.
Vehicles with DRW
6. NOTE: If excessive force must be used during brake rotor removal, the brake rotors should be checked for lateral runout prior to installation.
Remove the 8 wheel extension nuts and the wheel extension.
All vehicles
7. CAUTION: Do not allow the caliper to hang from the brake hose or damage to the hose can occur.
Remove the 2 caliper anchor plate bolts and position the caliper assembly aside.
^ Support the caliper using mechanic's wire.
8. Index mark and remove the brake disc.
9. CAUTION: Due to the fit of the splines, the hub lock will be difficult to remove. Lifting or lightly prying (with a small bar) on the axle U-joint will ease removal. When prying on the cap/hub flange, work around the flange to uniformly withdraw the hub lock.
CAUTION: The service replacement kit includes 2 O-ring seals; one for testing the hub lock assembly and one for reassembly into the wheel hub. DO NOT RE-USE O-RING SEALS.
CAUTION: Always check the vacuum leak rate of the wheel end assembly when repairing or diagnosing the axle, wheel end or hub lock performance.
Remove the wheel hub lock.
^ Loosen each retainer screw 1 to 2 turns.
^ Gently pry on the hub lock cap edge to release gasket adhesion.
^ Remove and discard the retainer screws.
^ While lifting/jiggling the axle U-Joint, pull or uniformly pry the hub lock from the wheel hub.
10. Remove the axle shaft snap ring.
11. NOTE: The wheel hub assembly is a slip fit design and should not require a puller to remove it.
Remove the 4 wheel hub assembly bolts and the wheel hub assembly.
12. If necessary, remove the brake disc shield.
Vehicles with ABS
13. Remove the wheel speed sensor bolt and the sensor.
All vehicles
14. Remove and discard the wheel hub assembly O-ring seal.
15. Position the wheel hub assembly in a vise with protective caps and remove the 4 studs using 2 mounting nuts.
Installation
All vehicles
1. Position the wheel hub assembly in a vise with protective caps and install the 4 studs using 2 mounting nuts.
2. NOTE: Any time the wheel hub is removed for any reason, a new O-ring seal must be installed. Failure to do so can cause a vacuum leak and loss of 4-wheel drive operations.
Install a new wheel hub assembly O-ring seal.
Vehicles with ABS
3. Position the wheel speed sensor and install the bolt.
^ Tighten to 18 Nm (13 ft. lbs.).
All vehicles
4. If removed, position the brake disc shield.
5. NOTE: Apply a coat of grease to the O-ring area of the wheel hub assembly before installation.
Position the wheel hub assembly and install the 4 nuts.
^ Tighten to 180 Nm (133 ft. lbs.).
All vehicles
6. Install the snap ring.
7. NOTE: Any time the hub lock is removed, a new O-ring seal must be installed. Failure to do so can cause a vacuum leak and loss of 4-wheel drive functions.
Install a new hub lock O-ring seal.
8. CAUTION: The service replacement kit includes 2 O-ring seals; one for testing the hub lock assembly and one for reassembly into the wheel hub. DO NOT RE-USE O-RING SEALS.
CAUTION: Always check the vacuum leak rate of the wheel end assembly when repairing or diagnosing the axle, wheel end or hub lock performance.
Install a new hub lock gasket, then install the hub lock.
1 Rotate the hub lock dial clockwise to the LOCK position. Apply lubricant to the inner and outer splines.
2 Insert the hub lock into the wheel hub while slowly turning the wheel hub to align the splines. Lift/jiggle the axle U-joint while pushing the hub lock into the wheel hub.
9. Install new hub lock screws. Rotate the dial to counter clockwise position (FREE/AUTO) position and confirm that the wheel hub turns free of the axle shaft.
^ Tighten to 6 Nm (53 inch lbs.).
10. CAUTION: Make sure that the wheel hub and brake disc mounting surfaces are clean and free of foreign material.
Position the front brake disc onto the wheel hub noting the position of the index mark.
11. Position the brake caliper and anchor plate assembly and install the bolts.
^ F-250 and F-350, tighten to 225 Nm (166 ft. lbs.).
^ F-450 and F-550, tighten to 400 Nm (295 ft. lbs.).
Vehicles with DRW
12. Position the wheel extension and install the nuts.
^ Tighten to 176 Nm (130 ft. lbs.).
Vehicles with ABS
13. Install the wheel speed sensor harness-to-wheel knuckle bolt.
^ Tighten to 15 Nm (11 ft. lbs.).
14. Install the 2 wheel speed sensor harness bolts.
^ Tighten to 15 Nm (11 ft. lbs.).
15. Install the wheel speed sensor harness bolt.
^ Tighten to 15 Nm (11 ft. lbs.).
16. Connect the wheel speed sensor electrical connector.
All vehicles
17. Test the system for normal operation.