I have a pair of sierra front uprights and 2 new set of bearings. one of the hub nuts came off easily, the other won't budge.

how do I get it off?

I have a 41mm socket and a 500mm arm. I tried to put a 1m tube on the arm but bent the tube and ripped my (makeshift) work bench apart. any advice would be welcome.

probably because one is conventional right hand thread ,and the other is left hand!!

Sounds like the right answer, but I'd be suspicious if one "came off easily"! They usually need the big bar (and a strong bench!) even when it is used the right way!

you can tell which is which by colour coded plastic in the "nyloc" part of nut, the r/h thread is BLUE, and the l/h thread is YELLOW.
NS you are dead right, mine were very tight to remove aswell!!
hope this helps
colin

I noticed that one was a LH thread and one RH. The back to front thread came off easiest (it came off) it took quite a bit of force with a long bar but not as much as I expected.

It is the conventional thread that won't budge. I checked several times to make sure I was pushing the right way. WD40, a bent tube and a sore elbow later and still no joy.

impact wrench at local garage. dead easy!

Hi,
One was loose 'cause I loosened it, just never got round to the other one - sorry.
At least the rear ones are off which are the real problem.
Anyway - big vice and 24" scaffolding bar did it for me.
Pat...

I gave up on my Sierra front hubs in the end. I tried everything to get them off, including scaffold poles, penetrating fluid the lot.

In then end I went grovelling down to the local garage, and they really peed me off by undoing it in about 10 seconds with massive impact wrench. I told them I must have loosened it.

If you want the easiest way, then get down to your local garage! Otherwise, build yourself a stronger workbench, get a bigger vice, and a stronger/longer bit of tubing or breaker bar!

Cheers
Andy

By the way, both my hub nuts were left hand threads. Off the same car and everything!

found a big bench bolted to a wall with a big vice. Had to get a 1.5m pole onto it before it would budge but it did.
thanks to all.