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10-20-2022, 12:48 PM | #1 |
Not Yet Wild
Join Date: Jun 2019
Location: Greenwood, AR
Posts: 65
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Clutch shaft thread repair help needed 81 G1
Need some help. A while back during the rebuild I removed the castle nut from the secondary clutch shaft. When I put it back on it never stayed tight. I’ve tried lock tight, lock tight with two jam nuts “lasted the longest” and a new nut. Nothing secures or holds tight anymore. I’ve never used a die set but I’m considering doing this here. So couple questions, if I go that route, do you know how to determine what size die to use? After a re thread how do you know what nut to use? Lastly would you take a different approach? Thanks for any information.
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10-20-2022, 02:17 PM | #2 |
Born to be Wild
Join Date: Feb 2019
Location: Palm Harbor Florida
Posts: 2,729
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Re: Clutch shaft thread repair help needed 81 G1
Looks like the shaft diameter is worn undersize near the cotter pin hole. Use a thread gauge to determine what thread pitch you have. If it's metric see if you can find an undersized SAE thread close to the same pitch. Vise versa for SAE to metric. Other than that you might have to wend it up to the original diameter and re-cut it using the original thread pitch. It's tedious work but it can be done.
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10-20-2022, 02:40 PM | #3 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Clutch shaft thread repair help needed 81 G1
Will it tighten up still? That looks pretty wallered out and probably should be replaced. As a quick fix you could probably tighten er down and lock the nut on with a couple tack welds. It won’t go anywhere and should be fine until you need to replace the clutch, at which time grind off your tack welds, and I’d plan on replacing the shaft as well.
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10-20-2022, 02:57 PM | #4 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,594
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Re: Clutch shaft thread repair help needed 81 G1
Another soso fix would be replace the nut with some washers or spacer to hold the clutch on the then use a bolt or pin thru the cotter hole to hold them in place. Probably the way I would do it as you haven't hurt the input shaft any worse.
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10-20-2022, 10:02 PM | #5 |
Not Yet Wild
Join Date: Jun 2019
Location: Greenwood, AR
Posts: 65
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Re: Clutch shaft thread repair help needed 81 G1
I did try this route but the force of the clutch broke any bolt I could fit in the cottor pin hole.
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10-20-2022, 10:04 PM | #6 | |
Not Yet Wild
Join Date: Jun 2019
Location: Greenwood, AR
Posts: 65
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Re: Clutch shaft thread repair help needed 81 G1
Quote:
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10-20-2022, 10:08 PM | #7 | |
Not Yet Wild
Join Date: Jun 2019
Location: Greenwood, AR
Posts: 65
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Re: Clutch shaft thread repair help needed 81 G1
Quote:
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10-21-2022, 12:43 AM | #8 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Clutch shaft thread repair help needed 81 G1
I’d say it’s time to seek an input shaft. May be a needle in a haystack but I’d start by calling Don plowman and maybe he has something
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10-21-2022, 05:59 AM | #9 |
Born to be Wild
Join Date: Feb 2019
Location: Palm Harbor Florida
Posts: 2,729
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Re: Clutch shaft thread repair help needed 81 G1
I have a Craftsman thread pitch gauge that I've had for years but I doubt that you would find it at Lowes or Ace any more. Google it online or check one of the auto parts stores. Could also try Snap-on, Mac or some of the other "tool truck" people that drive around.
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10-21-2022, 08:04 AM | #10 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,594
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Re: Clutch shaft thread repair help needed 81 G1
What about a shear pin from an outboard propeller ?
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