3-screw Warn Automatic Hub Locks (
F6TZ-1K105-AA)
The 2 items at the far L are one complete hub lock assembly piled together. The top center is the hub lock body. Bottom center is the cap with 3 screw holes. Top R are the friction ring & large (outer) C-ring (which retains the lock body in the hub). Lower R (upper row) are: the 2.5-inch single wheel bearing adjusting hex-nut; the adjusting nut lock clip; the steel splined thrust washer; (lower row) the small (inner) C-ring (which retains the axle stub shaft in the spindle); the plastic thrust washer; and the steel thrust washer. Refer to this:
There should never be a need to disassemble the hub lock body any more than this, unless it has been severely neglected or abused. DO NOT pack the lock with grease - a light coat is enough; any more will jam the mechanism. The correct way to clean & lube an auto hub lock is to dunk it in ATF each time the wheel bearings are serviced (which should be FREQUENTLY if the truck is used off-road; or every 30Kmi if it's not).
See the NEXT pic, and:
