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Clutch adjustment woes

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Clutch adjustment woes

Posted by alec_stevens at May 03. 2013

This may be a bit  weaney but has anyone got a workable wheeze for loosening off the clutch nut prior to adjustment?My system is to put the bike in gear,wedge the back drum brake on and give it some with a socket and T bar. Result? not a lot. The whole plot just goes round. This method usually involves "trying to take the nut by "surprise" with ajaring and ajolting. Still no joy. A cunning plan anyone?

Re: Clutch adjustment woes

Posted by ashley_cutler at May 03. 2013

If you are working on your own, lay over the seat from the RHS and use two hands on the spanner and loosen the nut. Easier with a helper. Question is why are you needing to undo the clutch nut or do you mean the clutch push rod adjuster lock nut and adjusting screw?

Re: Clutch adjustment woes

Posted by richard_payne at May 03. 2013

If it's just the pushrod adjuster nut then it shouldn't need much force to loosen it as it's only nipped up whilst holding the adjuster with a slotted screwdriver. If that can overcome your rear brake then I'd suggest it's time to look inside the brake.

In practice, even without the brake on, a substantial spanner and a sharp tap from a copper hammer should loosen it.

Re: Clutch adjustment woes

Posted by james_fanning at May 04. 2013

Don't do up the adjuster nut too tight after completing adjustment of the slotted adjuster. I used give myself the same problem after really giving that nut some welly following clutch pushrod adjustment thinking it might come loose whilst riding - then realised it doesn't even with only a light "nip up".

Re: Clutch adjustment woes

Posted by michael_sullivan at May 04. 2013
Previously james_fanning wrote:

Don't do up the adjuster nut too tight after completing adjustment of the slotted adjuster. I used give myself the same problem after really giving that nut some welly following clutch pushrod adjustment thinking it might come loose whilst riding - then realised it doesn't even with only a light "nip up".


When you are stepping on the brake to hold the drum, which gear are you in?  Try third or forth gear.

Mike

Re: Clutch adjustment woes

Posted by paul_smith at May 06. 2013
Previously alec_stevens wrote:

This may be a bit  weaney but has anyone got a workable wheeze for loosening off the clutch nut prior to adjustment?My system is to put the bike in gear,wedge the back drum brake on and give it some with a socket and T bar. Result? not a lot. The whole plot just goes round. This method usually involves "trying to take the nut by "surprise" with ajaring and ajolting. Still no joy. A cunning plan anyone?

Go to one of the big classic bike shows - buy a small compressor, then buy a air impact wrench - turn up second hand now and again. Connect the compressor to 240v, attach the wrench to the compressor, fit correct socket, ensure anticlockwise direction and apply tool to nut - spins off. Good for doing up as well. What location you at - come and use mine - I'm near Brighton? 

 

Re: Clutch adjustment woes

Posted by richard_chan at Sunday 06:36

Sorry to bring up this old thread. 

Re: Clutch adjustment woes

Posted by richard_chan at Sunday 06:39

Sorry to bring up an old thread. 

I'm also having troubles with this...

The manual says you should feel with the finger there there is "slight movement", now, thats relative isn't it? how much is "slight"?

I'm getting at least 7mm movement.

So i've tried 2nd and 3rd gear, rear brake on, "surprise" wrench, no luck. Usually this works on my other bikes.... not this time, and I don't have a compressor or a bike stand to check the rear brake...

Any advice?
Thanks
Rich.

Re: Clutch adjustment woes

Posted by philip_baker at Sunday 06:46

Rich

 

I'm in Basingstoke. If you're local maybe I can help you... message me.

 

Phil

Re: Clutch adjustment woes

Posted by philip_baker at Sunday 06:48

Probably should have addressed this to Alec ... elderly confusion .. well it IS 06.47 on a Sunday morning!

 

Phil

Re: Clutch adjustment woes

Posted by richard_chan at Sunday 08:03

Morning! Nothing wrong with checking forums in the morning! I've been up since 5:30 anyways cuz my little boy won't sleep. So it's actually nearly lunch time for me in theory (I'm an hour ahead)

I'm in Dresden Germany btw, No where near anyone i know who owns a Norton.

Re: Clutch adjustment woes

Posted by john_holmes at Sunday 10:14

You need a impact driver or air gun to shock it loose before it realises its on too tight.

Re: Clutch adjustment woes

Posted by mike_sullivan at Sunday 17:38

How ironic, I'm also struggling with this today...

In 1st, adjustment clutch lock nut & clutch plates turning when I try to undo.

I can't get a higher gear, no movement from gearbox (don't know why yet) - was working ok before the primary came off, I certainly don't have finance to buy a compressor ;)

Likely to be writing further posts, this saga started because I couldn't get the bike started, thought clutch might be sticking & cleaning the plates is usually straightforward!.

Any ideas welcome, frustratingly working away so can't retry until Friday, so gathering ideas in the meantime.

Regards

Mike

 

Re: Clutch adjustment woes

Posted by mike_sullivan at Sunday 17:39

Doh! - should have mentioned  Mk III  Commando!

Regards

Mike

Re: Clutch adjustment woes

Posted by peter_denham at Sunday 18:17

Previously alec_stevens wrote:

This may be a bit  weaney but has anyone got a workable wheeze for loosening off the clutch nut prior to adjustment?My system is to put the bike in gear,wedge the back drum brake on and give it some with a socket and T bar. Result? not a lot. The whole plot just goes round. This method usually involves "trying to take the nut by "surprise" with ajaring and ajolting. Still no joy. A cunning plan anyone?

I love that "trying to take the nut by surprise"I can relate.

Re: Clutch adjustment woes

Posted by christopher_winsby at Sunday 20:30

Previously mike_sullivan wrote:

How ironic, I'm also struggling with this today...

In 1st, adjustment clutch lock nut & clutch plates turning when I try to undo.

I can't get a higher gear, no movement from gearbox (don't know why yet) - was working ok before the primary came off, I certainly don't have finance to buy a compressor ;)

Likely to be writing further posts, this saga started because I couldn't get the bike started, thought clutch might be sticking & cleaning the plates is usually straightforward!.

Any ideas welcome, frustratingly working away so can't retry until Friday, so gathering ideas in the meantime.

Regards

Mike

 

If you go on Andover Norton web site and look at the clutch you will see the Clutch Diaphragm Spring is just a round spring plate and boss, no mechanical drive teeth. So to  hold still with correct fitting screwdriver and slacken lock nut I correct method. If the nut is seized you could try holding the boss still. If you wash the clutch off  you may get more friction but I would say you are better of holding the boss still. Try a strap wrench, large hose clip to give something to grip then use a cranked ring spanner and give a sharp crack with a mallet.

.

Re: Clutch adjustment woes

Posted by richard_chan at Sunday 21:34

So while we're trying to solve the but problem , can someone tell me what "slight movement" is? I'm talking about the cable rod on the right hand cover.

I checked, there is a good 7mm movement in mine. That's not "slight" movement is it? Or am i over thinking it?

Thx

Re: Clutch adjustment woes

Posted by james_fanning at Monday 03:10

I normally work on 3 to 4 mm movement between the cable actuating arm and clutch pushrod , so 7 mm sounds a bit too much. But if your clutch is not dragging with gear changes normal when you declutch , and you can select neutral with engine running then you are still OK. However , a clutch adjustment to reduce the free movement should probably be done at some stage.

Re: Clutch adjustment woes

Posted by gary_knowles at Tuesday 11:36

Previously richard_chan wrote:

Sorry to bring up an old thread. 

I'm also having troubles with this...

The manual says you should feel with the finger there there is "slight movement", now, thats relative isn't it? how much is "slight"?

I'm getting at least 7mm movement.

So i've tried 2nd and 3rd gear, rear brake on, "surprise" wrench, no luck. Usually this works on my other bikes.... not this time, and I don't have a compressor or a bike stand to check the rear brake...

Any advice?
Thanks
Rich.

I use Mole Grips on the centre boss. You can put as much force on the nut as you like then.

Re: Clutch adjustment woes

Posted by david_evans at Tuesday 23:01

I would slacken off the cable so it has no part in the adjustment. Screw the clutch adjusting screw in until it just stops, back it off by one complete turn and nip up with the locking nut, then adjust the cable to give about 2mm of slack in the cable. If the lock nut is jammed, centre punch between a flat on the nut and the thread, drill with a 3 or 4mm drill until you know you have gone through the nut. with a small sharp chisel, (like the one you made in the metalwork class at school) give it a sharp tap to split the nut, undo, replace. You could do all this with the primary chain case in situ with some of the kids plasticine to collect the swarf. (don't give it back to the kids to play with)

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