Can't get my nut off

[Guest]

I am trying to split the case on the 1100 bottom end that Mark gave me. The guy who assembled it must have been a gorrilla because I have been trying to remove the inner clutch sleeve hub nut and have put over 250 ft-lbs of torque on it (to the point where my 1/2 inch breaker bar is starting to bend) and still cannot break it free. The dang thing is meant to be to torqued to 50 ft-lbs at the most!

I don't have access to air tools so an impact is out of the question. I belive I will have to cut the nut off...what should I use?

Any other suggestions would be appreciated!

Hap

[first timer]

take the case down to a auto shop, give the guy 10 bucks and have him use a impact gun.

-ryan

[Mr. Jiggles]

Have you tried using an impact driver? You can pull the screw driver attachment off and put on 1/2" sockets.

Also, maybe try putting a little acetone on the exposed threads in case the assembler used loctite.

Good luck.

Jeff

[Hoomgar]

Dang Hap, sounds like someone needs to learn what a torque wrench is for sure. If you can't do what the other guys have said I have already used a Dremel tool to cut the nut away enough to weaken it to the point that it will spin or break off. Just go in slowly a little at a time so as not to cut into the threads. This prevents possible damage to the stud/bolt of whatever you are removing it from. Not sure what your working on looks like but I know this has worked perfectly for me everytime I have done it.

http://www.dremel.com/html/home_fr.html

[Anonymous]

I would use a 3/4 drive set and a torque multiplier. It seems to me that I usually have good luck with stomping down on the end of the breaker bar too. That's how I get lug nuts off of my van. My boss put a bolt on once using a 4 foot long pipe wrench and an excavator...was that housing ever in Kenora? 8O

Steve

[Paul]

I suppose you've already tried it, hit the end of the socket with a large hammer whilst you've got it loaded up with torque?
If all else fails, get that chisel out and hammer it loose! A butchers way I know, but it is the last resort.

[argonsagas]

Try one of these:

[Hap Call]

The big problem is that I do not have the clutch plates in the basket to help hold the center hub still (even if I did, I wouldn't have the outer clutch hub to apply pressure to the plates), so the center hub just spins...I've tried getting a piece of wood wedged so that I can secure the hub to keep it from turning but all it does is splinter the wood. It spins too easily for an impact to be able to loosen the nut. The nut splitter would be great but there is not enough room to get it in there.

I'm going to try the Dremel solution...

Hap

[KennyJ]

Sounds like locktite to me. I don't think your stock clutch could handle a torque of 250 ft/lbs without serious slippage, thus how could he torque it that tight.


Heat the nut with a propane torch until it is pretty hot, this will soften the locktite and the nut should spin off. As mentioned above, an air wrench/impact wrench would also be helpful.

I would use the dremel as a last resort. Heat should do the trick!

Kenny

[Hoomgar]

I'm going to try the Dremel solution...

Hap

Good luck Hap, I can tell you that it works well as I have done it many times and it has never left me down. Try to use the smallest diameter disk you have. That will allow you to get in close as you can without scoring the engine surfaces itself and still be plenty deep enough to cut into where the threads start. If you make a cut the whole way around the bottom (if you can get in there to do it) then one cut on each side and it will almost pop off with a tap from a screwdriver and the palm of your hand. It has been a life saver for me many times.

[Anonymous]

I would try the Dremel solution too.
I agree that heat would also work, but there's probably an oil seal behind it. You could damage it, if you heat it up too much.

[Don Lobacz]

Did you put it in gear and step on the brake? Get a 1/2" Impact on that sucker!

[focus frenzy]

Say Hap, I have a nitro cat super duty 1/2 drive impact wrench that generates 1000lbs of removal torque, you can borrow.

[Hap Call]

Did you put it in gear and step on the brake? Get a 1/2" Impact on that sucker!

The engine is not in a bike but on the bench. Mark got it as an extra when he bought a GS750...it was part of a bunch of spare parts. They had tried to split the cases (all the case bolts are in a bag) but evidently could not get this nut off. It is the only thing between me and getting the cases apart. Behind the clutch hub is a plate that bolts to both the top and bottom case halves. There were no clutch plates and without the outer pressure plate to place pressure on the clutch pack (if there were one) stepping on the brake and putting it in gear does no good. Also if the outer pressure plate is on there, you cannot access the nut I'm trying to remove! Woe is me!

There is a Suzuki tool (09920-53710, clutch holder which is superceded to 09920-53740) but that costs a mere $164.26 at Ron Ayers! In the past I’ve been able to lever the center clutch hub so that I could tighten or loosen the nut…now it’s stuck like white on rice!

When using an impact you need at least a little inertia for the parts to keep it from spinning to allow the impact to break the nut...but there is very little there in just the shaft and the aluminum center clutch hub!

Hap

[gtsg01]

Hap

Don's suggestion should work.

The inner hub is splined to the transmission input shaft. Put the trans in 5th gear and use a pipe wrench (the Brake) on an old sprocket to keep the output shaft from turning.

The impact wrench should get it loose, just make sure to take as much slack out of the gear stack as possible.