Diff Lock Actuator Motor Magnets Unglued? (1 Viewer)

[CaptBeardilocks]

So I’m rebuilding my diff lock actuators and found that the magnets in the motor have come unglued.

Has anyone had any luck regluing them in? Or am I screwed and have to replace the whole bloody actuator?

 

[Kernal]

I reglued the magnets of a front windshield wiper motor back on the case using two part Marine epoxy, it worked. Important to remove any rust or old epoxy from inside the case so the magnet will stay stuck. I also used some 1000 grit sand paper on the commutator, and cleaned it off using CRC Electronics cleaner. You'll want to oil the bronze bushing and regrease the gears. Don't use Carb or Brake cleaner as those can remove the lacquer coating on the windings and damage rubber seals/components. Others (landtank) have more experience with that particular motor, wait for them to chime in.

 

[CaptBeardilocks]

I did a bunch of research on motor repair and magnet re-gluing. Advice is all over the board as far as what to use.

I doubt High temps will be much of a problem here as the motor never runs for more than a few seconds at a time. It does probably take a pretty good shaking on off-road trips, however I can’t see shock impact as being that big of a problem either...

So what adhesive to use? Thin coating of two part epoxy? Something more like a superglue? Gorilla glue?

 

[subzali]

There are some threads on here by @landtank @clownmidget and @RavenTai that deal with the locker actuators. IIRC epoxy can be used to glue them back properly. Have to make sure the polarity is correct though.

 

[Godwin]

I reglued magnets a few weeks ago and used a compass to check polarity by holding the compass over the to of the magnet and watching to see the direction of the arrow. Magnets need to be N-S-N-S, IOW alternating.

JB Weld makes a kneabable metal epoxy. It comes in a tube and you pull off a piece, mash it around until the color is uniform, and then you can put it to use. Do not use this stuff to glue in the magnets because the magnets need to fit closely to the side of the housing to allow the armature to fit properly. Even using the thinnest layer of this material was too thick to allow proper fitment of parts. Use a good glue.

 

[Kernal]

This is what I used for my windshield wiper motor magnet. Picked the Marine Epoxy because of the rust I found inside the case.

Permatex® Marine H2 Hold Epoxy

Permatex® Marine H2 Hold Epoxy bonds underwater applications without breaking and can be used on both under and above water repairs. This industrial strength waterproof epoxy is ideal for surfaces exposed to salt or freshwater such as portable water tanks, fuel tanks, drains, boats, and more!...

www.permatex.com

 

[richardlillard1]

I use a two-part eproxy one the ones I’ve rebuilt, only a small amount is needed.

Be sure to get the magnets installed in the proper polarization or the motor will not function properly.

 

[80t0ylc]

I did a bunch of research on motor repair and magnet re-gluing. Advice is all over the board as far as what to use.

I doubt High temps will be much of a problem here as the motor never runs for more than a few seconds at a time......

It's not the heat that the motor makes, but the heat of your diff while it's in use and that gets transfered to this motor. Next time you're out on a tough trail use a laser thermometer on your drive train components when stopped on a break. Tranny, T/C, diffs and hubs. Or if you're daring.....touch 'em. You might be surprised. I'd use a glue that holds up under 200-300*F use at least.