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help...can't get the nut-off

  • Thread starter Thread starter dtkid
  • Start date Start date
D

dtkid

Guest
Hey Folks:

Strange problem.. I can't remove the nut that holds the primary/drive sprocket on my 81' GS1100E. I soaked it with PB-blaster, used an impact wrench, tried a little heat from a propane torch.....but nothing helps to break it loose.

Question: Inasmuch as I was a little afraid to put a great deal of heat on the shaft.....could I damage any seals or internals if I heat the sprocket-shaft cherry red???

I know this sounds like a question from a virgin...but I'm sorta stumped. Any suggestions??
 
dtkid said:
Hey Folks:

Strange problem.. I can't remove the nut that holds the primary/drive sprocket on my 81' GS1100E. I soaked it with PB-blaster, used an impact wrench, tried a little heat from a propane torch.....but nothing helps to break it loose.

Question: Inasmuch as I was a little afraid to put a great deal of heat on the shaft.....could I damage any seals or internals if I heat the sprocket-shaft cherry red???

I know this sounds like a question from a virgin...but I'm sorta stumped. Any suggestions??
Click to expand...

i dunno about heat, but have you tried tapping it back and forth tight and loose? that's what i do. if that fails, i get out the 4 foot cheater bar and have a friend hold it on the nut while i step on it.
 
May be a silly question, but you did bend the little washer, right?
 
dtkid said:
Hey Folks:

Strange problem.. I can't remove the nut that holds the primary/drive sprocket on my 81' GS1100E. I soaked it with PB-blaster, used an impact wrench, tried a little heat from a propane torch.....but nothing helps to break it loose.

Question: Inasmuch as I was a little afraid to put a great deal of heat on the shaft.....could I damage any seals or internals if I heat the sprocket-shaft cherry red???

I know this sounds like a question from a virgin...but I'm sorta stumped. Any suggestions??
Click to expand...

Mine is a 77 GS750, so maybe quite different, but the nut on my drive sprocket did not want to come off either. The torque speck for that nut on my bike is pretty high...700+ in-lbs. I had to get my huge Crescent wrench (I think it is about 2 feet long) and REALLY lever it to get the nut to budge.
 
You do have a oil seal on the so be careful with the heat. Cherry red is not a good thing for the seal or the output shaft. You might be splitting the cases soon.
Are you having trouble with it spinning on you? Did you put it in gear and have someone sit on it with the rear brake held?
I bought an electric impact wrench from Habor Freight. That did the trick for me.
 
Last edited:
Heating it cherry red would be A Really Bad Idea -- you could really screw up the tempering of the parts, plus, oh yeah -- you'd melt an awful lot of aluminum.

A few ideas:

1) Air impact and a socket that fits right. That should do it right there.

2) Large breaker bar/lever.

3) Assuming the chain is still installed and you have cast wheels, step on the rear brake or put a hunk of 2X4 through the wheel.

4) Righty-tighty, lefty-loosey?
 
chef1366 said:
I bought an electric impact wrench from Habor Freight. That did the trick for me.
Click to expand...
I second the electric impact from Harbor Fart. Mine has worked like a charm - no compressor required. Much nicer to only have to run extension cords instead of air lines, too.

scurvy
 
Thanks guys...........I also can't believe my air-impact wrench wouldn't do the trick. Got it though.........huge lever bar and 1.25in socket (plus large overweight, 4-tooth havin' hillbilly friend sittin' on the seat). By the way, what size is the metric socket for that nut. I couldn't find one big enough, metric that is. Odd, the 1.25in fit it perfect.
 
dtkid said:
Thanks guys...........I also can't believe my air-impact wrench wouldn't do the trick. Got it though.........huge lever bar and 1.25in socket (plus large overweight, 4-tooth havin' hillbilly friend sittin' on the seat). By the way, what size is the metric socket for that nut. I couldn't find one big enough, metric that is. Odd, the 1.25in fit it perfect.
Click to expand...

I had the same problem with the socket size. I used a huge cresent wrench to get it off but bought the socket so I could use the torque wrench when I put it back on. The local auto parts store didn't have metric that big but the 1 1/4 fit perfectly.
 
inches X 25.4 = mm

1.25" X 25.4 = 31.75mm

So a 1.25" socket probably fits a skosh tighter than the normal 32mm socket. Good to know!


So should we come up with a new "special tool" abbreviation for "large overweight, 4-tooth havin' hillbilly friend"?

LO4THHF? :-D
 
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