Clutch pushrod free play disappearing - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 13 (permalink) Old 04-18-2019, 03:10 AM Thread Starter
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Clutch pushrod free play disappearing

Per the thread title, the free play in my clutch pushrod keeps closing up. After pretty much every ride the gap has closed and clutch starts to slip a little when pushing on. Is this likely to be the nut on the other end working loose? If so is there anything to be aware of when removing the kickstart cover - e.g. is it full of pingfukits that will scatter across the garage never to be seeen again?
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post #2 of 13 (permalink) Old 04-18-2019, 05:11 AM
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What sort of bike?

Have you followed the clutch adjustment procedure in the manual?

Loosening nut on the timing side end of the mainshaft has the opposite effect: clearance increases.

Last edited by Tritn Thrashr; 04-18-2019 at 05:34 AM.
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post #3 of 13 (permalink) Old 04-18-2019, 05:50 AM Thread Starter
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Originally Posted by Tritn Thrashr View Post
What sort of bike?

Have you followed the clutch adjustment procedure in the manual?

Loosening nut on the timing side end of the mainshaft has the opposite effect: clearance increases.
Sorry 1976 T140V running a Norman Hyde 7 plate clutch. Yes the clutch adjustment has been followed meticulously (many times), but the freeplay needs constant adjustment
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post #4 of 13 (permalink) Old 04-18-2019, 06:47 AM
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Have you measured the clutch rod. Maybe its hardened ends have worn away.?
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post #5 of 13 (permalink) Old 04-18-2019, 06:53 AM
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Quote:
Originally Posted by BMF View Post
Have you measured the clutch rod. Maybe its hardened ends have worn away.?
Pushrod getting shorter increases clearance.
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post #6 of 13 (permalink) Old 04-18-2019, 07:16 AM
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Hi
There are very few conditions that result in the free play between the pushrod and pressure plate that produce in a change that is noticeable within a couple of hundred miles riding. Most catastrophic, or warnings of a catastrophic failure usually result in an increase in the push rod free play.
The main three examples being, clutch cable failure, the nut coming loose on the mainshaft or the clutch coming loose, all result in incresed play.

The adjustment is so you are able compensate for wear on the clutch plates, this should happen so slowly that you should not need to check the free play beyond regular service intervals; unless you are drag racing.

There maybe one caveat on this; after you install a new set of clutch plates, there could be enhanced wear of the plates until they are are ‘bedded in’.

I think I would try to adjust the pushrod clearance again, making sure of two things:
A) The clutch cable is disconected ath the handlebar end and only reconnected and adjusted for cable clearance, once the pushrod adjusment is complete.
B) The threads on the adjuster are lubricated and free spinning, and that you make the adjustment using the smallest screwdriver that you find will fit. Only adjust using a very light fingertip touch. This is to increase your sensitivity in finding the exact point of contact between the rod and adjuster, sometimes it takese several tries backwards and forwards to determine the contact point exactly.

If you still have a problem after, then theoretically if the clutch drum and hub are badly ‘notched’ through wear the plates might be hung up on them during adjustment-but I think I am clutching at straws here.

Good luck
Peg

Edit: Always check the clearance with the engine cold so expansion does not confuse your readings.
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Last edited by Rancidpegwoman; 04-18-2019 at 07:20 AM.
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post #7 of 13 (permalink) Old 04-18-2019, 08:14 AM
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If you are needing to adjust the clutch rod clearance every time you ride I would examine the clutch cable from one end to the other. It sounds to me as if one of the ends is pulling off or the cable itself is failing. Are you backing off the cable adjustment fully , including the adjuster in the middle of the sheath, before adjusting the center clutch adjustment ? You need to do this to center the balls in the grooves on the lift mechanism under the trans outer cover. After checking all that youíre probably going to need to remove the outer tranny cover or clutch cover to find whatís not right. Is it a new clutch cable thatís stretching every time you ride ?
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post #8 of 13 (permalink) Old 04-18-2019, 08:33 AM Thread Starter
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I'm fairly sure it's not the cable as I'm maintaining an 1/8 inch play at the lever, and the basket etc all seemed fine when I put the 7 plate kit in. So the tranny cover... is it fairly straightforward to remove and replace? Any tips or hazards to be aware of?
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post #9 of 13 (permalink) Old 04-18-2019, 08:39 AM
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Itís pretty straight forward. You might have to tap on it if itís been glued on. Put a container under it to collect lube .
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post #10 of 13 (permalink) Old 04-18-2019, 09:00 AM
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There are nuts as well as screws.


Leave kickstart and gear pedals on. Hold the kickstart against its spring.

Oh it’s 1976. Forget the gear pedal.

Last edited by Tritn Thrashr; 04-18-2019 at 09:42 AM.
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