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Mainshaft Nut Backing Off #553637
07/19/14 1:09 am
07/19/14 1:09 am
Joined: Jun 2012
Posts: 17
Monterey, CA
S
stugs Offline OP
BritBike Forum member
stugs  Offline OP
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Joined: Jun 2012
Posts: 17
Monterey, CA

I have a TR25W basket case I finally finished getting back together. I took it for a test ride and about 5 minutes in the clutch ceased springing back.

I took the timing cover off and the mainshaft nut, which was new, had backed itself off and stripped some of the threads (of the nut). I did some searching and it appears lots of folks have recommended using loctite.

Before I pick up a new nut and get things back together tomorrow, I was curious if anyone had other suggestions.

Thanks,
matt

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Re: Mainshaft Nut Backing Off [Re: stugs] #553657
07/19/14 4:30 am
07/19/14 4:30 am
Joined: Oct 2003
Posts: 3,525
Emsworth, sunny south of Engla...
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dave jones Online content
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dave jones  Online Content
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Joined: Oct 2003
Posts: 3,525
Emsworth, sunny south of Engla...
Did the clutch hub come off the taper on the mainshaft or did the centre slide on the hub? You can grind the hub to the centre or you can clean it and use a little powdered chalk dust to help the tapers grip. On mine I used some blue loctite 243 on the treads and torqued the nut to the figure in the manual.

dave

Re: Mainshaft Nut Backing Off [Re: stugs] #553689
07/19/14 9:12 am
07/19/14 9:12 am
Joined: Dec 2004
Posts: 9,139
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,139
Scotland
The mainshaft under the timing cover should have a tab washer under the nut but loctite blue will suffice for now as long as you torque it correctly.

Re: Mainshaft Nut Backing Off [Re: stugs] #553690
07/19/14 9:14 am
07/19/14 9:14 am
Joined: Mar 2005
Posts: 10,052
Boston, Massachusetts
J
John Healy Online content

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John Healy  Online Content

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Joined: Mar 2005
Posts: 10,052
Boston, Massachusetts
And the threads were free of oil when the Loctite was applied.


Re: Mainshaft Nut Backing Off [Re: stugs] #553725
07/19/14 1:51 pm
07/19/14 1:51 pm
Joined: Jun 2012
Posts: 17
Monterey, CA
S
stugs Offline OP
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stugs  Offline OP
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Joined: Jun 2012
Posts: 17
Monterey, CA
Thanks all. I just installed a new nut + tab washer with loctite blue. Shakedown run #2 in 24hrs when this sets up.

matt


Moderated by  John Healy 


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