File 33 of 183
Prev | Next

autolock3brkdn.jpg | Hits: 250 | Posted on: 3/2/24 | View original size (2.31 MB)

This lock was grimy, so I stripped it down (which required filing away some staked metal), soaked all the parts in naphtha for a while, and then scrub-brushed each one so I could figure out how it works, and if it was repairable. Turns out there's virtually no damage under the grime that I removed, like nearly all other 3-screw autos I've collected.
IF THE IMAGE IS TOO SMALL, click it.

Disassembly:
1) After removing the lock body assembly from the hub, wipe the grease off. Rinse in solvent (naphtha, kerosene, mineral spirits, or parts cleaner) to remove as much residue as possible.
2) Remove the cam assembly from the hub; wipe & rinse it similarly.
3) Rotate the ramp until its slots align with the step so it comes out.
4) Gently compress the garter, extract it from the step, and separate the garter spring so all the cam pieces can be washed in solvent & scrubbed. FURTHER DISASSEMBLY IS NOT RECOMMENDED.
5) While submerged in solvent, rotate the drive spline & follower in the body until they align so the follower can be compressed against the wave springs, flushing solvent out of & into the lock body assembly until it flows out relatively clean.

Clean all parts thoroughly, scrub-brushing as needed to remove hardened grease, dirt, & rust scale. Wash in solvent, allow to dry, then apply a thin coat of disk-brake-rated (NOT marine) wheel bearing grease using a brush or by working mating parts together. Smooth & spread the grease by hand, and remove any excess. For final lubrication & any subsequent light cleaning, submerge the lock body assembly in ATF every 30Kmi.

. . . . . .