[mattbikeboy]

I've got an old pair of AtomBombs on my Mantis PF and I wondering if the rear hub is rebuildable? Had it in a shop and they didn't know how to pull it apart (don't know if they had ever even seen NP hubs before). It seem that the bearings are worn out and I was thinking I would like to get them back up to snuff.

Thanks
MBB

 

[~martini~]

Yeah, they can be rebuilt. All you need to do is pull off the cassette hubbody, and pull the bearings out. Replacement bearings are easy to find, and the best place to get them for the shop is through QBP or any other parts distributor. I'd take them to a better shop first though....

 

[mattbikeboy]

NukeProof Atom Bomb

Cool thanks,

Two more questions. Is there a trick to pulling the freehub body off? And is it rebuildable?

MBB

 

[donk]

The freehub body "should" be a standard shimano one. It comes off just like shimano (punch the axle out and use an allen key). Before you remove the freehub body from the hub, you'll need to remove the press fit bearing adapter that Nukeproof used. It should come out relatively easy by gently prying/tapping it out. Then you'll need to press it into the new freehub body. You'll need to remove the dust cover from the freehub body first, pretty easy job to do.

One word of caution, from both sets of NP hubs I had, the freehub body once removed and replaced will sometimes squeal like a stuck pig. If this happens the hub is basically toast, as the machined interface is not to the correct tolerances.

If anyone has any suggestions to stop the squealing, I'd appreciate them. NP was little help when they were still around.