MegaSack DRAW - This year's winner is user - rgwb
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xt m770 not touched the chainring bolts from new - need to change the middle ring quite urgently, got the t30 bit in the first 3 all came out, was majorly impressed, no major force needed!
then the last one, as i smugly started to turn, is completely tight 🙁
any ideas on how to get this bad boy out?? i dont have a heat gun nor soldering iron etc....
i do have a the chainring bolt tool, if i wedge that in the inner side of the rings, and apply some force with t30 on the front, is it more likely to budge? rather than just trying to loosen the t30 outer bit??
bloody typical this, everytime i attempt to fix something, it goes wrong 🙁
is there any spray etc that could get in and loosen it? ive tried wd40?
come on genius mechanic type bike folk! 🙂
Drill & drill bit, not sure what size is requiredbut someone will be along in a bit to tell us.
Plusgas is your friend..
plusgas? what is this? sounds promising?
dont really want to be drilling as the head isnt buggered, its fine its just tight in..
how will plusgas get inside the thread though kingtut?
What sort of T30 tool have you got?
I had this problem and ended up getting a long T30 driver from Halfords which you can insert a T-bar through. This did the trick.
I tried using my T30 socket set and it wouldn't budge.
james - its a t30 socket set one on a screwdriver type...
you got a link to this one from halfords sir?
many thanks squire!
Sorry can't see it on Halfords website
Tis basically a long screwdriver with a t30 fixed head, it must be at least 12 inches long with a hole in the handle which I stuck a metal rod through to give me some more torque
Plus gas loosens stuff (don't know the science)better than WD40.
I'd try dousing in more WD40 and/or penetrating oil and get some leverage on your screwdriver or buy an l-shaped torx key or try a socket set with a torx bit. If the rear of the fitting starts turning then use the tool that you mentioned to hold it steady.
right managed to borrow a ratchet with a t30 bit on it, its about 10 inches long (waaaheeey) hopefully enough to get enough torq on it! my bloody palm is killng from the screwdriver type so will be leaving that method for a while 🙁
I had this problem the other day and I think there was a thread a couple of days ago along a similar vein....
I ended up using a T30 bit in a t-handled attachment, locking that into a Workmate type bench and using the crank arm to get more torque on the bolt. Came free no problem - basically keeping the driver/bolt still & turning the crank around it.
Weirdly, I'm pretty sure the other thread about this said that 3 were fine & one was stuck fast, which is the same thing I had.....
cheers stumpy, i dont have a workbench/vice etc 🙁
im hopeful this longer ratchet will give enough leverage to get the thing moving 🙁
should be at least be able to get a bit more movement/power/torque through a ratchet than trying to grip a screwdriver set type one??
Maybe but certainly if it has a T handle
Might need to shock it by hitting the end of the wrench with a hammer in the anti-clockwise direction
Ive had this problem before, and found that if I did the other bolts back up I was able to undo the tight bolt first and the others then came away freely as well.
Maybe worth a shot?
cheers artctic for the tip, definitely worth checking first! ill give that a shot too...
very strange that all 3 came off easily first, then the last one jammed in?
same happened to the chap above too? hmmmm
If you do them one at a time rather loosen each one a bit at the time the chainrings try prise a part, this can be enough pressure to make unscrewing awkward.
righty cheers, so worth doing back up then i guess....
btw - what torque do the bolts need to be back upto???
btw - what torque do the bolts need to be back upto???
Until they stop and do them in rotation don't tighten them up individually.
Try putting them all back in and then slackening of just the stibborn one, sounds like a plan to me 😀
right ill try that, i did think it was extremely odd that just one was stuck from new! cheers folks ill report back later with either a fail or victory!
VICTORY!!!!
YAAAAAYYYY!!
thanks to y'all for the advice, its worked a treat because a combination of plusgas (very similar car type one), tightening all the bolts back up, and a longer ratchet (definitely the key here though) and job done
came off a breeze in the end, seriously if you are using a socket type screwdriver one for these bolts you will really struggle to get enough purchase/torque.....something with a bit of length ie, ratchet seemed to be alot more powerful and required very little force!
anyways, job done, nice and easy and no knackered heads on bolts for once 😆
thanks again for the top advice between you!
copperslip on reassembly ?
nope 😆
i did smear a bit of on the threads, not quite copperslip, but still...to be honest, they werent that tight anyways, and defo had no coppergrease on from new....
ill cross that bridge next time, will probably need a new chainset by then anyways 🙂