DrDoom Posted July 7, 2009 Report Share Posted July 7, 2009 (edited) http://jforjustice.co.uk/banksters Edited July 7, 2009 by DrDoom Quote Link to comment Share on other sites More sharing options...
Mark W Posted July 7, 2009 Report Share Posted July 7, 2009 Self-extracting crank bolts are a f**king lie.I don't really get what your problem here is though, you seem to say that the more you loosen it, the looser it gets? " you can turn it about quarter turn and it'll become loose, then another quarter turn and it'll go loose again!" Quote Link to comment Share on other sites More sharing options...
scary_jeff Posted July 7, 2009 Report Share Posted July 7, 2009 I think he means it goes loose, then goes tight again. Could be a bent axle? If so, not much you can do apart from push harder. If you really have to get the cranks off and don't mind risking something breaking, you can stick a metal pipe over the end of the Allen key to get more leverage. Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 7, 2009 Author Report Share Posted July 7, 2009 http://jforjustice.co.uk/banksters Quote Link to comment Share on other sites More sharing options...
forteh Posted July 7, 2009 Report Share Posted July 7, 2009 If they are self extracting crankbolts then try squirting a bit of oil between the head of the bolt and the extractor ring, should make things alittle easier Sounds as though something has bent though. Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 7, 2009 Author Report Share Posted July 7, 2009 http://jforjustice.co.uk/banksters Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted July 7, 2009 Report Share Posted July 7, 2009 give em shit..... hahaer maybe oil? and/or boiling water? worst comes to the worst, drill em out as they're 8mm allen keys, it'll be a fairly easy job Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 7, 2009 Author Report Share Posted July 7, 2009 http://jforjustice.co.uk/banksters Quote Link to comment Share on other sites More sharing options...
sstein Posted July 7, 2009 Report Share Posted July 7, 2009 People have given you loads of advice and all you keep saying is that you don't want to try it, so why ask? Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 7, 2009 Author Report Share Posted July 7, 2009 (edited) http://jforjustice.co.uk/banksters Edited July 7, 2009 by DrDoom Quote Link to comment Share on other sites More sharing options...
gussie Posted July 7, 2009 Report Share Posted July 7, 2009 (edited) I thought with self extracting crank bolts they stayed in the crank arm the hole time even when the crank arm was fully off the bike. So when undoing the crank bolt the crank arms is pulled off the spindle/axle? So surely it would take a lot more force to turn the bolt if it has to act as a crank puller too. I know when i use a crank puller i crap my self every time because it feels like i'm using quite a lot of force. And as for the it goes tight then loose, +1 for the something is PROBABLY bent. Does it have anything like this has on it or look like this. The holes/larger allen key being used to get it on the first time i think?Edit: Haha to the last part of your post!And also is it an isis or square taper bottom bracket because they have different diameters of bolts and isis also has two different diameters. So if you are going to try and drill it I (IMO) would be tempted to drill with say a 5mm (this is me presuming the smallest diameter of bolt for a bottom bracket is m12? although i think square taper may be smaller) first so you know there is no way of hitting the threads on the axle/spindle then progressively move to bigger drills. In fact have you called tartybikes? It may seem silly but to be honest if i had tried everyhting the forum had recommended i would go to them explain the situation what you have tried ect ect. and then as a last resort start to drill? Edited July 7, 2009 by gussie Quote Link to comment Share on other sites More sharing options...
trialsmax04 Posted July 7, 2009 Report Share Posted July 7, 2009 probably cross threaded. In which case its time to unscrew them as hard as poss, and new bolts or bb depending on which is damaged.Max Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 7, 2009 Author Report Share Posted July 7, 2009 (edited) http://jforjustice.co.uk/banksters Edited July 7, 2009 by DrDoom Quote Link to comment Share on other sites More sharing options...
gussie Posted July 7, 2009 Report Share Posted July 7, 2009 Like that, I guess there extractor type!So, do I get them to the loose point and welly it with a hammer as they dont seem to be extracting the cranks from the bike as there ment to! Well if you have any kinda long pointy thing you could try just undoing the head of the bolt. Using hammer and long pointy device, tapping it round? As this may relieve some of the tension on the actually bolt. Which in turn may mean you can take them out and then use a normal crank puller? That may not work though. Is there some sort of separation between the bolt head and the bit with the holes? Like in the link i left above there is clearly two different pieces of metal? Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 7, 2009 Author Report Share Posted July 7, 2009 http://jforjustice.co.uk/banksters Quote Link to comment Share on other sites More sharing options...
JonMack Posted July 8, 2009 Report Share Posted July 8, 2009 Why dont you just take the extracting section off, and then just undo the bolt and take the crank off normally?Assuming they look like this, then you can just undo the outer section with a hammer and punch, or a set of circlip pliers, or a pin spanner if you have one small enough, and then just undo the bolt inside and it will all come out. Quote Link to comment Share on other sites More sharing options...
gussie Posted July 8, 2009 Report Share Posted July 8, 2009 Why dont you just take the extracting section off, and then just undo the bolt and take the crank off normally?Assuming they look like this, then you can just undo the outer section with a hammer and punch, or a set of circlip pliers, or a pin spanner if you have one small enough, and then just undo the bolt inside and it will all come out.Yes i suggested that but which way would it unscrew because on this it looks like it is a "left hand thread", is that what they're called but i mean it unscrews the way a normal thread would tighten????? I think. I'm slightly confused and can't be bothered putting the brain power in to visualise it all and stuff. Plus i dont have a set of cranks i can test it one...So that sucks Quote Link to comment Share on other sites More sharing options...
JonMack Posted July 8, 2009 Report Share Posted July 8, 2009 They're standard thread. Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 8, 2009 Author Report Share Posted July 8, 2009 http://jforjustice.co.uk/banksters Quote Link to comment Share on other sites More sharing options...
gussie Posted July 8, 2009 Report Share Posted July 8, 2009 Tell him copper grease is what you put on threads....only locktite sometimes. Quote Link to comment Share on other sites More sharing options...
DrDoom Posted July 8, 2009 Author Report Share Posted July 8, 2009 http://jforjustice.co.uk/banksters Quote Link to comment Share on other sites More sharing options...
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