tkD Posted October 5, 2009 Report Share Posted October 5, 2009 Hey guys, I'm getting rather frustrated with my ************************ing cranks, they keep coming loose. It's only the left side crank arm that is coming loose. I've taken it off, checked for rounded edges and so on, wacked it back on, and tightened it to buggeroo, I'm not weak so thats rather bloody tight, and it still comes off, I mean, wtf? Loctite? Will that really make ALL the difference help please. Quote Link to comment Share on other sites More sharing options...
Ben John-Hynes Posted October 5, 2009 Report Share Posted October 5, 2009 BB taper. Quote Link to comment Share on other sites More sharing options...
tkD Posted October 5, 2009 Author Report Share Posted October 5, 2009 BB taper.Explain? I'm thick with knowledge lol. Quote Link to comment Share on other sites More sharing options...
Dale-Hill Posted October 5, 2009 Report Share Posted October 5, 2009 Ben meens that it might not be the cranks which are rounded its the BB Just get a thick plastic bag cut it up a bit and stick it on the BB do it up and it should be fine. Quote Link to comment Share on other sites More sharing options...
tkD Posted October 5, 2009 Author Report Share Posted October 5, 2009 Ben meens that it might not be the cranks which are rounded its the BB Just get a thick plastic bag cut it up a bit and stick it on the BB do it up and it should be fine.The bottom bracket is fine also, this bike is like 3 days old Quote Link to comment Share on other sites More sharing options...
Jan Tore Posted October 5, 2009 Report Share Posted October 5, 2009 I had the same problem with my brand new bike. Thing I did was to take the crank all of, clean a bit, and the put it back and tighten it as hell with a pipe. Quote Link to comment Share on other sites More sharing options...
BringThatShtIn Posted October 5, 2009 Report Share Posted October 5, 2009 Apparently you have to tighten the cranks up as much as you can as soon as you get them, otherwise they'll just keep coming loose whatever you do. It happened to me as well, and eventually my cranks got shredded some how and I had to get new ones. I don't have any advice though lol 'cause I didn't even sort mine. Just warning you =S Quote Link to comment Share on other sites More sharing options...
tkD Posted October 5, 2009 Author Report Share Posted October 5, 2009 I've tightened it as much as I can, hopefully it won't come loose this time. Quote Link to comment Share on other sites More sharing options...
Dan_Trials Posted October 5, 2009 Report Share Posted October 5, 2009 my cranks got shredded some howI didn't even sort mine Quote Link to comment Share on other sites More sharing options...
hoots man Posted October 5, 2009 Report Share Posted October 5, 2009 make sure that the bolt flange bit is not meeting the axil of the bb. probably not but just check. Quote Link to comment Share on other sites More sharing options...
Little Yoshi Posted October 5, 2009 Report Share Posted October 5, 2009 Loctight. It helps. Quote Link to comment Share on other sites More sharing options...
Dan_Trials Posted October 5, 2009 Report Share Posted October 5, 2009 Loctight. It helps.Lol, I read the first quote in your signature as part of your reply. Homebrew LockTite Quote Link to comment Share on other sites More sharing options...
Little Yoshi Posted October 5, 2009 Report Share Posted October 5, 2009 Lol, I read the first quote in your signature as part of your reply. Homebrew LockTite Na just drys and cracks. Would keep with locktite . Quote Link to comment Share on other sites More sharing options...
Dan_Trials Posted October 5, 2009 Report Share Posted October 5, 2009 Na just drys and cracks. Would keep with locktite . Haha, but locktite does too might be on to some thing here.... Quote Link to comment Share on other sites More sharing options...
Jan Tore Posted October 5, 2009 Report Share Posted October 5, 2009 I mean, really tight. I jumped on it until it made a "tight enought" noise. Just like when you use your foot to tighten up a car wheel. Quote Link to comment Share on other sites More sharing options...
Dan_Trials Posted October 5, 2009 Report Share Posted October 5, 2009 I mean, really tight. I jumped on it until it made a "tight enought" noise. Just like when you use your foot to tighten up a car wheel.WTF? You should never do that. The manufacturers equip the vehicle with a wheel wrench capable of delivering enough leverage to remove the wheel nuts/bolts when tightend to the correct torque. If you over tighten them then how do you get them off when you have a puncture? Quote Link to comment Share on other sites More sharing options...
tkD Posted October 5, 2009 Author Report Share Posted October 5, 2009 WTF? You should never do that. The manufacturers equip the vehicle with a wheel wrench capable of delivering enough leverage to remove the wheel nuts/bolts when tightend to the correct torque. If you over tighten them then how do you get them off when you have a puncture?Jump on it the otherway? So Loctite thread locker it is then?! Quote Link to comment Share on other sites More sharing options...
Dan_Trials Posted October 5, 2009 Report Share Posted October 5, 2009 Jump on it the otherway? Quote Link to comment Share on other sites More sharing options...
Sam Moss Posted October 5, 2009 Report Share Posted October 5, 2009 I had the szme problem, i got a new bb and it started to happen. so then i just put the old bolts in and it sorted it (the bolts was clean with no lock tite on) Quote Link to comment Share on other sites More sharing options...
Dan_Trials Posted October 5, 2009 Report Share Posted October 5, 2009 (edited) I had the szme problem, i got a new bb and it started to happen. so then i just put the old bolts in and it sorted it (the bolts was clean with no lock tite on)What grade were the two sets of bolts? Edit: Sorry for being so anal, just got a theory. Edited October 5, 2009 by Dan_Trials Quote Link to comment Share on other sites More sharing options...
tkD Posted October 5, 2009 Author Report Share Posted October 5, 2009 Every bike I've ever owned the cranks and bottom brackets ALWAYS go, I've rode bmx, dirt, park, allsorts. Always the bottom bracket and cranks. That should tell me something :/ Quote Link to comment Share on other sites More sharing options...
Little Yoshi Posted October 5, 2009 Report Share Posted October 5, 2009 Every bike I've ever owned the cranks and bottom brackets ALWAYS go, I've rode bmx, dirt, park, allsorts. Always the bottom bracket and cranks. That should tell me something :/Yeah it does. You need to matain them better. Quote Link to comment Share on other sites More sharing options...
tkD Posted October 5, 2009 Author Report Share Posted October 5, 2009 Yeah it does. You need to matain them better. I don't rag my bikes, I do look after them, I just don't understand why I annihilate my cranks =[ Quote Link to comment Share on other sites More sharing options...
totaltrials Posted October 5, 2009 Report Share Posted October 5, 2009 Every bike I've ever owned the cranks and bottom brackets ALWAYS go, I've rode bmx, dirt, park, allsorts. Always the bottom bracket and cranks. That should tell me something :/Get some better cranks? Seriously though. Left hand cranks have a tendancy to come loose. As soon as they come loose they start to splay the taper on the cranks (guessing you have square taper interface) ending up in a rounded taper over time.I'd first try a different bolt in, if you're struggling to tighten it properly try using a 14mm end bolt and tighten it up with a socket wrench, if you still find it comes loose, try some thread lock on the threads (or loctite if you want to get ripped off).If you've knackered the taper on the cranks already and you don't fancy buying any new cranks you can try cutting some old drink cans up into 4 peices and placing it on each flat and then trying the crank on. Or try some thread lock on the taper. Quote Link to comment Share on other sites More sharing options...
Muel Posted October 5, 2009 Report Share Posted October 5, 2009 How quick do they come loose? Are you tightening them several times a ride for the first few rides? Quote Link to comment Share on other sites More sharing options...
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