'65 T120 Clutch Hub Locking Up - Triumph Forum: Triumph Rat Motorcycle Forums
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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 11-18-2012, 04:50 AM   #1 (permalink)
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'65 T120 Clutch Hub Locking Up

Novice replacing the primary chain and clutch plates on my 1965 T120. Everything I read says that I would need a puller to remove the drums but everything came off easily without a puller. On re-assembly, the inner drum locks up with the outer drum when I tighten the nut. Not torquing it, just tightening a bit. I took everything apart and re-assembled. Looks like everything is assembled correctly. Thrust washer is in behind the the outer drum, copper side out. All 20 rollers correctly positioned. Shaft washer in place. I'm wondering now if the nut was not torqued but just snugged up with locktite when I took it apart. Are the drive center and spider tapered to keep the inner drum from travelling too far back? What is supposed to keep the drums from binding together? Any help appreciated

Last edited by siglass; 11-18-2012 at 02:00 PM.
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Old 11-18-2012, 06:52 AM   #2 (permalink)
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If the clutch screws are incorrect so they protrude past the rim of the clutch centre or if they twist and become misplaced during assembly they will jam between the clutch centre and the drum and lock everything up when the nut is tightened.
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Old 11-18-2012, 08:47 AM   #3 (permalink)
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Good point with the spring studs.If they're not free to rattle,they could be misplaced.

The only other thing I would suspect is the thrust washer dropping out nof position.
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Old 11-18-2012, 02:47 PM   #4 (permalink)
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Just made a sign for the garage wall reminding myself to look for the obvious. Appreciate both replies. Both were right on. One of the screws was turned and binding up. Drum is now torqued down and rotating freely. Thank you for the quick feedback.

Steve
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Old 11-18-2012, 02:52 PM   #5 (permalink)
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Are you fitting a new thrust washer?

I found a new un locked up my clutch. When I replaced the original there was no problem.

The difference in thinkness between the two was under 2 thou. I think the nub of the problem was the chamfer worn on the inside diameter of the old washer; the new one lacked this and was binding.

You might find the same problem if you were fitting the old one back to front.

PS

I see you have it sorted, well done.

Last edited by Doug748; 11-18-2012 at 02:54 PM. Reason: PS
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Old 11-19-2012, 12:59 AM   #6 (permalink)
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I used the old thrust washer. It was in good shape. Didn't notice a chamfer. Thanks for your input.
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