I have just bought a crankset on the classifieds and it has arrived with a bit of play in the spider in relation to the crank arm. I haven't seen this before and was wondering if anyone else has had this problem?
Can it be fixed? I can see veyr clearly how it is attached at the moment, but I will clean it up tonight and have a closer look. It looks kind of like a press fitting so it might not be possible.
cheers
Mark
What crank is it?
It's the standard shimano hollowtech, i'll try to find a picture....
I'd say that's probably borked TBH
There is a code stamped on the back of the pedal arm around the pedal hole. Find that and I may be able to help.
FC-M540
It looks kind of like a press fitting so it might not be possible.
in the absence of a locking ring, extreme violence with a centre punch or similar drift should deform enough metal to clinch it tight again...
Nickc was right, sorry!
Mister P, do you have access to shimano service instructions or something?
SFB, there is some kind of crimped ring in there, but without destroying it I can't work out how it is supposed to hold it tight. I guess hitting it with a hammer won't hurt.... actually best not, probably best to just send it back to the seller. It might be more difficult if i send it back in more pieces than it arrived.
SFB, there is some kind of crimped ring in there, but without destroying it I can't work out how it is supposed to hold it tight
I have an old one at home so I'll have a look see, but yes, I guess it's best just to reject it as not fit for purpose 
I had a look at my crank and the spider seems to be splined onto the crank arm. It not obvious what holds it on, though it looks like an interference fit...
I have had this - the spider goes on splines on the crank and the end of the splined shaft bit is peened over to grip it. Judicious use of a centre punch sorts it for a while at least - but if you just bought 'em they should go back
Everyone has access to Shimano service instructions and exploded diagrams. Google for FC-M540 EV (for exploded view) and you will see what I see. This works with all current components and a large percentage of old ones.
Thanks for the info guys. It looks like there is some kind of circlip, but it doesn't seem sensible that a crank would be held on this way. I think the centre punch will be the most sensible answer if i don't return them.
Jeremy, did yours come lose again?
I had this happen twice - one set fine after peening the crimp with a centre punch - the other worked a bit loose again
For anyone interested, Jeremy method did work, a big screwdriver and a hammer worked a treat!
A quick spray with black paint to hide the heel rub and they are good as new. 
cheers
Mark
This topic has been closed to new replies.
Advertisement
Advertisement
Advertisement
Advertisement
Advertisement
