any advice on crossed threads on rear hub nut?

[culp]

I'm in the process of rebuilding the rear brakes on my 1970 Traveller. Oil has been leaking out of the hub and has contaminated the brake linings. I'm working on the left hand side. It's turned into a full-on rebuild, brake cylinder worn, halfshaft gasket leaking, bearing worn, handbrake clevis pin siezed.........

The big shallow nut that holds the hub on is chewed up horribly. It looks as though its been tightened up with a cold chisel and the threads crossed at some stage. I have got the old one off with a proper hub spanner but the threaded part of the axle casing the nut screws onto is in a mess and I'm concerned it's not safe, i.e. the nut will slip when I tighten it

Does any one have any tips as to how to clean up the thread so the nut will locate properly?

[bmcecosse]

Swiss triangular file is the only way , or perhaps a 'thread comb' if you know the TPI - and lots of patience. Which side is it? Probably wise to get a new nut. Usually one thump with the chisel gets it going -without doing any damage. If it's the LH side - then probably some clown has been hitting it round the wrong way........ It is of course a LH thread...

[philthehill]

culp
As that axle thread is a safety critical item it cannot be emphasised enough that the thread both on the end of the axle tube and in the nut must be in good condition.
Before making any comment on the threads could you please post a picture of the damage so as an opinion as to its re-useability can be formed.
The TPI (threads per inch) of the threads on the end of the axle tube and inside the nut is 16 TPI.
This is the type of thread file you require and which has a 16 TPI side.
http://www.ebay.co.uk/itm/Sykes-Pickava ... _6XIKtf3sQ

Reference using a chisel - a chisel should never be used on a nut unless you want to split it. The correct sized spanner should be used to do the job properly and safely - this is one of the tools I have available for dealing with the axle nut. I also have the correct size socket.
Phil
[frame][/frame]

[culp]

Thanks for the advice, I'll sort a picture later today. I did use a spanner to get the nut off, shame the same couldn't be said for one of my predecessors. I was planning to replace the nut and tab washer anyway

[culp]

https://goo.gl/photos/3nL1PtE2QkvZo2vv9

[philthehill]

Culp
I have looked at the picture and I would say it is on the borderline between scrap and savable.
You have nothing to loose in trying to resurrect the thread but if you have the slightest doubt scrap the axle and find another.
A better picture with the hub removed would be of help.
Try this method to try and save the axle threads.
Remove hub.
Cut a good hub nut in half. Make sure it is the right one L/H or R/H thread.
Place the two half's to the rear of the damaged portion of thread.
Clamp the two half's together and unscrew.
Un screwing from behind the damage may just save it.
Phil

[bmcecosse]

That's a good idea - although a bit expensive on nuts..... I have a spare axle casing (with good threads and nuts) - but I suspect I am a goodly way from you and 'carriage' would not be easy.

[les]

I wouldn't be happy with that thread, it's too far gone.

[culp]

Some more shots now I have the hub off and cleaned up a bit[frame][/frame] This ones from the top

[culp]

This one's from the side at the back[frame][/frame] It's the left side.

[culp]

That's a good idea - although a bit expensive on nuts..... I have a spare axle casing (with good threads and nuts) - but I suspect I am a goodly way from you and 'carriage' would not be easy.

Funny you should say that but I'm going to be in Glasgow May 3rd-4th