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MG MGB Technical - Banjo Axle Hub Nut

Reading the archive and the factory manual one finds conflicting information on the thread of the hub nut.

According to the manual (and the information is only in the exploded diagram) looking form the rear forward the nut on the right side (UK Drivers side) is a left hand thread. Is this correct?

I have the blue box spanner made in Sheffield for 1 61/64th inch octagnal nut -it is a real sloppy fit. I have had my car for 23 years and have no reason to suspect the nut has ever been off before.

Does anyone have any bright ideas for undoing it?

George
G R Wilder

yes, BFH and a torch, hee hee. V
vem myers

If it doesn't have a split-pin or other positive locking mechanism it will be a left-hand thread on the right-hand side.

For 'torch' read blow-lamp or oxy-acetylene. I've not undone a banjo before but on other types if you put the wheel back on and jack it down you can use the weight of the car to lever against when undoing it with a long breaker-bar. Don't know if this is possible on a banjo.
Paul Hunt 2

Hi:

I have replaced the banjo hub rear seals many times, and have had no difficulity with nut removal. Years ago I used a blunt chissel to loosen the nuts. You must peen back the lock tab prior to loosening the nut. I now use the Moss 1 61/64 spanner with an impact gun. Remember to use a new lock tab and "O" ring when replacing the hub.

Good luck: Rich Boris, 67 B roadster
Rich Boris

According to Moss - and my own recollection - the lefthand nut is a lefthand thread.

http://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=123#10

It works the opposite way to wire-wheel spinners, as the hub rotating in the normal (forward) direction will tighten the nut, theoretically.

Dave
Dave O'Neill 2

Thanks folks for your advice the nut is off now - just the bearing housing to pull.
For information the bearing nut on the right hand side looking from the rear is as it says in the UK Moss parts book a right hand thread the left side is a left hand thread.

The BMC Manual (and the Hertitage DVD) and the diagarm in my Haynes book are the wrong way round. Oh what fun.

For Paul Hunt
I have read your info and its all very good for a tubed axle - great website - but I am afraid you cannot use your technique on a wire wheel banjo car. The axle is very different to yours. Thanks again for making the effort to give good advice.
George
G R Wilder

I found that a mini grinder and a ceramic cutting wheel (a little one) is a little faster, less work and cleaner. Basically any way that works is good. The nut is trash so you just want to weaken it enough to get it to release its grip
Frank Baker

I see now, the nut is screwed onto the axle casing of a banjo, rather than onto the half-shaft of a Salisbury.
Paul Hunt 2


If you take the nut off with the right tool it should be fine not trash. (Unless a dpo has been there with a chisel before you).

There is a great article on dismatling Banjo hubs on Barney Gayloods MGA site - sorry I don't have the link, but he also recomends the tools to do the job properly.

Most impotant is tightening the damn thing up again after the work is done. If you don't get the right torque it doesn't hold the hub tight enough so you'll have to do the job again as the seals will go bad very fast.
Tim Boyle

Barney Gaylords MGA site

www.mgaguru.com

HTH

Larry
Larry Hallanger

This thread was discussed between 30/04/2007 and 09/05/2007

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