Removing lockomatic hubs to replace rotors?

Attylah

Attylah

Member
I'm trying to replace the rotors on my 1980 terra Dana 44. It has the lockomatic hubs, and I can't figure out how to remove the hubs. I've made it past the outer snap ring and removing outer hub, but now I'm stumped. I want to replace the wheel bearings too. This hub looks different than any other I've worked on. Any advice?
 
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So you have both parts of the locking hub off? Lets see... I'm sure you got the 6 bolts holding the outter hub on. Then remove the outter hub. There should be a snap ring on end of the axle shaft, remove, and slide off the inner hub part. You should be able to see the the nuts that hold the rotor/hub on now.
 
I have the snap ring off, and the inner hub. But that's where I run into problems. It doesn't seem to be a regular shaped nut. Is there a special tool I need to spin this off? Here's a pic of where I'm at.
 

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That's the jam nut. There are set screws in some of those little holes. I can see one in the upper right. I think there are 2 set screws. But check them. After that you can use a chisel or small punch and a hammer to turn the ring. You can see some of the holes are messed up from the last time it was apart.
 
The three setscrews in those round locknuts take a tiny sized hex/allen wrench-key. Two of those holes have no setscrews; they are for a pin spanner.

Do yourself a favor: try to get a proper pin spanner to remove those round locknuts. Using a punch or chisel and hammer just messes up those rare locknuts.

I use a bicycle bottom bracket pin spanner. Try to locate a park tools green handled pin spanner at a local bike shop. It works quite well.

I also hope you have a 2 1/16" socket for the inner locknut...
 
Great information, thanks a ton guys. I'll be calling some bike shops this morning looking for that pin spanner, anything to make life easier.
 
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