ROTOR (FRONT - 4WD W/AUTOMATIC LOCKING HUBS)
Raise vehicle and support with safety stands. Remove wheel assembly and caliper. Remove locking hub assembly. See appropiate LOCKING HUBS under REMOVAL & INSTALLATION . Remove wheel bearing locknuts and lock washers. Remove hub and disc assembly.
Install hub assembly. Wheel bearing locknut and lock washer installation is the same as with manual locking hubs. Tighten outer wheel bearing locknut to 150 ft. lbs. (203 N.m). To complete installation, reverse removal procedure.
ROTOR (FRONT - 4WD W/MANUAL LOCKING HUBS)
Raise vehicle and support with safety stands. Remove wheel assembly and caliper. Remove locking hub assembly. See appropiate LOCKING HUBS under REMOVAL & INSTALLATION .
Remove hub and disc assembly. Outer wheel bearing will slide out as hub is being removed. Remove spindle retaining nuts, then carefully remove spindle from knuckle and axle shaft.
Remove grease seal and inner wheel bearing. Inspect needle and wheel bearings for wear or damage. Inspect bearing cups for pits or cracks. Replace worn parts. If necessary, remove bearing cups with drift.
Pack needle bearings and spindle face that mates with spindle seal. Install spindle over axle shaft and onto knuckle. Tighten retaining nuts to 50-60 ft. lbs. (68-81 N.m) on all models.
Pack wheel bearings. Install inner bearing and grease seal. Install hub and disc assembly on spindle. Install outer bearing and inner locknut. Tighten bearing inner locknut to 50 ft. lbs. (68 N.m) while rotating wheel back and forth.
On Bronco, F150 and F250 with Dana Model 44 front axle, back off inner locknut 90 degrees. Install lock washer by turning inner locknut to nearest hole in lock washer.
Install outer locknut and tighten to 150 ft. lbs. (203 N.m). Wheel spindle end play should be 0.00"-.006" (0.0-15 mm). Reverse removal procedure to complete installation.
On F250 and F350 with Dana Model 50 front axle, back off inner locknut and retighten to 31-39 ft. lbs. (42-53 N.m). While rotating hub, back off locknut 135-150 degrees.
Install lock washer and outer locknut. Tighten outer locknut to 65 ft. lbs. (88 N.m). Bend one ear of lock washer over inner locknut and other ear over outer locknut. Wheel spindle end play should be .001"-.009" (.025-.23 mm). Reverse removal procedure to complete installation.
LOCKING HUBS (AUTOMATIC TYPE)
Raise vehicle and install safety stands. To remove locking hub assembly, first separate locking hub cap assembly from body assembly. Using Torx-Bit (TX25), detach 5 cap screws from cap assembly, then remove locking hub cap and bearing components.
NOTE:DO NOT drop ball bearing, race, spring retainer or spring during disassembly.
Remove rubber seal. Remove seal bridge retainer (small metal stamping) from spring retainer ring space. Remove retainer ring by closing ends with needle-nose pliers while pulling hub lock from wheel hub.
If wheel hub and spindle are to be removed, remove "C" washer from stub shaft groove. Remove splined spacer from shaft. Remove wheel bearing locknuts and lock washer. Disassemble, clean and inspect locking hub assembly components.
Fig. 22: Exploded View of Automatic Locking Hub
Courtesy of FORD MOTOR CO.
Remove snap ring and flat washer from inner end of locking hub assembly. Pull hub sleeve and attached parts out of drag sleeve, then cock drag sleeve to unlock tangs of brake band. Remove drag sleeve assembly.
CAUTION:DO NOT remove brake band from drag sleeve.
Wash drag sleeve/brake band assembly in clean solvent and thoroughly blow dry. Lubricate brake band/drag sleeve assembly with lubricant meeting specification ESL-M1C93A (Darmex Spec. DX-123-LT). Work lubricant over spring and area of drag sleeve under spring.
Dip locking hub body assembly (except cap assembly and brake band/drag sleeve assembly) in Dexron II ATF and allow to drip dry for a few minutes before proceeding with assembly.
Assemble one of 2 brake band tangs on each side of outer cage (plastic), which is located in window of inner cage (steel). It is necessary to cock these parts to engage tangs in this position as the drag sleeve is positioned against cam follower face. Install washer and snap ring.
Wash locking hub cap bearing, race and retainer in clean solvent, then inspect for excessive wear or damage. Replace components as needed. Thoroughly blow dry parts with compressed air. DO NOT spin bearings with air or damage can result. Repack bearing with lithium grease, then properly position bearing assembly in race.
If removed, install wheel bearing inner adjusting nut and lock washer. Tighten outer locknut to 150 ft. lbs. (203 N.m). Install splined spacer and "C" washer onto axle shaft.
NOTE:Remove excess grease from hub lock and hub splines before installation.
Start locking hub assembly into hub. Ensure large tangs are lined up with lock washer and outside diameter and inside diameter splines are in line with hub and axle shaft splines.
Install retainer ring by closing ring ends with needle-nose pliers and, at the same time, push locking hub assembly into hub. Install seal bridge retainer (narrow end first).
Install rubber seal over locking hub. Install locking hub cap assembly. Ensure ball bearing, race, spring and retainer are in proper position. Tighten Torx-Bit screws to 40-50 in. lbs. (4.5-5.6 N.m) following tightening sequence (tighten one, skip one, etc.) until complete.
LOCKING HUBS (MANUAL TYPE)
On F250/350 models, first separate locking hub cap assembly from hub body assembly by removing 6 Allen cap screws from cap assembly, then slip components apart. Detach snap ring (retainer ring) from end of axle shaft.
Remove lock ring (seated in groove of wheel hub). Slide hub body assembly out of wheel hub. If necessary, install 2 cap screws and pull body from out of hub.
On Bronco and F150 models, raise vehicle and install safety stands. Remove wheels and lug nut retainer washers. Remove manual locking hub assembly.
To remove internal hub lock from outer body assembly, remove outer lock ring seated in hub body groove. Internal assembly, spring and clutch gear should now slide out of hub body.
NOTE:DO NOT pack grease into locking hub. Excess grease can cause an increase in dialing effort.
To install locking hub assembly components, reverse removal procedure. Install locking hub cap assembly and tighten cap screws to 40-60 in. lbs. (4.5-6.0 N.m).