Clutches aren't all equal?
- Thread starter silentbutdeadly
- Start date
PerthMTB
Likes Dirt
Here's two places I've bought them before, but you're right - both are out of stock at the moment - sorry!
http://www.bike-components.de/products/info/p38237_Nockeneinheit-fuer-RD-M820---RD-M786---RD-M675---RD-M640---RD-M615.html
http://bicikli.de/shop/SHIMANO-spare-part-Y-5Y198120-RD-M786-CAM-UNIT-Shimano-Code-Y5Y198120_2
Not really surprising as there's a lot of these failing and people are starting to just replace the cam unit themselves rather than bother sending the whole thing back for warranty.
Have you tried asking your LBS to order one through the Australian Shimano distributor? Or are they out of stock also...
Ezkaton
Eats Squid
Yep, takes a few mins.
Knuckles
Lives under a bridge
Tighten it to the point just before it breaks :thumb:
moorey
call me Mia
Knuckles is my illegitimate son :tsk:
Knuckles
Lives under a bridge
So that's why you keep calling me a bastard! Gee thanks dad.
moorey
call me Mia
No lad, it's why I keep calling you a cunt.
teK--
Eats Squid
I suggest tighten it only 1/4 to 1/3 a turn at a time.
If you really have to crank the clucth lever get it to the ON position then you have overdone it. Or if you break your thumb trying to change gears it's also too much
Cheers - glad I wasn't going mad and they're actually out of stock.
No haven't as yet, will follow that up with him this week - really only decided to do something about it reading this thread on Friday night.
thanks again.
silentbutdeadly
has some good things to say
Tighten it carefully when the switch is off. You'll feel the added resistance in the switch when you switch it on. The bolt puts pressure on the band and the switch lever puts even more...
The result of tightening mine a quarter turn produced a far more satisfactory result. Much less banging about with the chain only slapping on the top of the chainstay if I don't have sufficient pedal pressure on the chain.
The result of tightening mine a quarter turn produced a far more satisfactory result. Much less banging about with the chain only slapping on the top of the chainstay if I don't have sufficient pedal pressure on the chain.
PerthMTB
Likes Dirt
If you really want to know how much to tighten it, use a torque wrench in the centre of the drum to measure the actual friction being exerted by the clutch. See Shimano diagram below but substitute torque wrench with a 4mm hex bit for the allen key. Then adjust, check, repeat until you get within the torque specs for your model of RD...
If tightening that bolt still doesn't increase the tension then it might be that your cam unit has already failed - and no amount of tightening will work. Check the cam bracket - here's what it looks like when they fail...
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teK--
Eats Squid
Thanks
Just to clarify, stick torque wrench 4mm in the clutch centre, and set wrench for righthand (normal) threads, put finger on the tab, then pull the derailleur arm forward and measure the torque?