Monolever fork nut stuck

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pxc433
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Monolever fork nut stuck

Post by pxc433 » Thu Dec 28, 2017 6:34 am

Hi all

So, I have fork alignment issues. Not massive, but they are there all the same.

The big nut that secures the top of the fork tube to the flimsy yoke is seized on one side. At least, I could not get it to budge.

I'm loathed to take a dremmel to it and cut it off, but I am going to replace the yoke anyways with the San Jose item.

But before I get drastic on it, do you have any ideas as to how I might get this thing to budge just using tools?

Cheers
1988 R100RS with Blue/Silver 1979 paint job
2011 F800ST in White/Black

richard t
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Re: Monolever fork nut stuck

Post by richard t » Thu Dec 28, 2017 3:49 pm

try a little heat

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Zombie Master
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Re: Monolever fork nut stuck

Post by Zombie Master » Thu Dec 28, 2017 3:57 pm

If you are talking about the fork cap on the top of the leg, You must loosen the triple clamp bolts first. They pinch the threads of the fork tube.
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Wobbly
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Re: Monolever fork nut stuck

Post by Wobbly » Thu Dec 28, 2017 6:14 pm

The big (34mm ??) stanchion tube caps typically get stuck when novice mechanics decide it's a great idea to put some thread sealer on there after a fork oil change. It is not a good idea. The fork oil never ventures that high and the residue can only make getting the cap off much harder the next time.
After 20 years as a professional bike mechanic and 30 years as an engineer I know just enough to be dangerous !

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Zombie Master
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Re: Monolever fork nut stuck

Post by Zombie Master » Thu Dec 28, 2017 8:31 pm

Wobbly wrote:
Thu Dec 28, 2017 6:14 pm
The big (34mm ??) stanchion tube caps typically get stuck when novice mechanics decide it's a great idea to put some thread sealer on there after a fork oil change. It is not a good idea. The fork oil never ventures that high and the residue can only make getting the cap off much harder the next time.

I anti seize these.
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SteveD
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Re: Monolever fork nut stuck

Post by SteveD » Thu Dec 28, 2017 9:42 pm

@pxc433 what tools are you using to loosen it?
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Cheers, Steve
Victoria, S.E.Oz.


1982 R100RSR100RS supergallery. https://boxerboy81.smugmug.com/
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ME 109
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Re: Monolever fork nut stuck

Post by ME 109 » Fri Dec 29, 2017 1:18 am

Wobbly wrote:
Thu Dec 28, 2017 6:14 pm
The fork oil never ventures that high and the residue can only make getting the cap off much harder the next time.
Why do some folk have oil leaks at that place?

Without access to an impact gun and single hex socket, some heat from an electric heat gun may be your friend.
The top nuts are supposed to be torqued to 80 ft. lbs.?
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pxc433
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Re: Monolever fork nut stuck

Post by pxc433 » Fri Dec 29, 2017 6:50 am

Thanks guys.

I'll try heat and a soft mallet.

Does it matter where the heat is applied to? Eg, Am I heating the nut, or tube, or both?
1988 R100RS with Blue/Silver 1979 paint job
2011 F800ST in White/Black

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ME 109
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Re: Monolever fork nut stuck

Post by ME 109 » Fri Dec 29, 2017 3:25 pm

Heat the tube ideally, It will ever so slightly expand and it will heat whatever sealant may be in there.
An extension bar on your wrench will be better than using a mallet.
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Zombie Master
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Re: Monolever fork nut stuck

Post by Zombie Master » Fri Dec 29, 2017 6:36 pm

I find it confusing that the Monolever refers to a rear suspension unit, but your problem is with the fork.
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