Akira_Shock! Posted September 21, 2008 Report Share Posted September 21, 2008 Hey, just wondering how you'd go about stopping them from coming loose? After a bit of riding, you'd feel the faintest bit of creak/wobble, and when you go to tighten the crankbolts they are very loosened off....! Currently there is no copper grease on the ISIS splines, nor is there any loctite on the crankbolt threads. Would these two factors completely stop the self-loosening of the cranks/bolts? Mind you, when removing the cranks with a crank removal tool, it doesn't even take all that much strength like it would it square taper cranks for example, to pull off the crank arm. This is normal or not? This is for a new set of ISIS cranks, by the way, with Echo crank bolts (maybe they aren't as good as 'usual' ISIS crankbolts?) in the massive size for the super-hollowed out ISIS axles.Thanks! Quote Link to comment Share on other sites More sharing options...
Muel Posted September 21, 2008 Report Share Posted September 21, 2008 I've always found that if they ever come loose, the tapers get damaged so they're never the same again.Try greasing the tapers and the crank bolt, then lamping them up tight. Quote Link to comment Share on other sites More sharing options...
Ryan. Posted September 21, 2008 Report Share Posted September 21, 2008 you could try the coke can bodge? would be a mission with isis though Quote Link to comment Share on other sites More sharing options...
Greetings Posted September 21, 2008 Report Share Posted September 21, 2008 you could try the coke can bodge? would be a mission with isis though It's actually not that difficult, you just use thin strips of aluminium along the grooves in the spline and bend them into the axle. That way it's pretty easy to put the crank on. Once it's on, you just cut off the strips that are bent into the axle so the bolt can go in. Quote Link to comment Share on other sites More sharing options...
dan_addison Posted September 21, 2008 Report Share Posted September 21, 2008 bit of loctite does the job, just dont use the green stuff. Unless you dont want them off, ever Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted September 21, 2008 Report Share Posted September 21, 2008 I've always found that if they ever come loose, the tapers get damaged so they're never the same again.Yep, need to keep an eye on a new set of cranks, as they will come loose when settling in (more susceptible to coming loose by the anti-clockwise gyroscopic action on the left crank arm when new).And once it comes loose, it will deform the shape of the shape of the spline due the free movement of the crank.Bodging is probably your only option without having to buy new cranks. Quote Link to comment Share on other sites More sharing options...
Mat Smith! Posted September 21, 2008 Report Share Posted September 21, 2008 I've used coke can in isis cranks, its easy once u get the hang of it, juts cut it into like 1mm strips and put them inside every dip untill its tight, use superglue aswell.Mat Quote Link to comment Share on other sites More sharing options...
RossMcd Posted September 21, 2008 Report Share Posted September 21, 2008 I had the same problem until today Got a hold of some loctite, covered the bb splines, crank and crank bolt in it, left for 30 mins then it hasnt come slack since Quote Link to comment Share on other sites More sharing options...
The Duck Posted September 21, 2008 Report Share Posted September 21, 2008 Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted September 21, 2008 Report Share Posted September 21, 2008 (edited) Got a hold of some loctite, covered the bb splines, crank and crank bolt in it, left for 30 mins then it hasnt come slack since Loctite what?Super Glue, Epoxy, Specialty, Polyurethane, Aerosol, Rust, Threadlocker, Construction Adhesive?http://www.loctiteproducts.com/ All loctite or glue will do is bond the contact surfaces (which with a worn crank arm, will be less than a normal crank arm), therefore you have less contacting surfaces between crank and BB axle, the surfaces that glued will suffer from the most stress as the load is not as evenly distributed as it would be with properly fitted crank.That means....PREMATURE CRANK/BB WEAR! Edited September 21, 2008 by Albino Slig Quote Link to comment Share on other sites More sharing options...
RossMcd Posted September 21, 2008 Report Share Posted September 21, 2008 Loctite what?Super Glue, Epoxy, Specialty, Polyurethane, Aerosol, Rust, Threadlocker, Construction Adhesive?http://www.loctiteproducts.com/ All loctite or glue will do is bond the contact surfaces (which with a worn crank arm, will be less than a normal crank arm), therefore you have less contacting surfaces between crank and BB axle, the surfaces that glued will suffer from the most stress as the load is not as evenly distributed as it would be with properly fitted crank.That means....PREMATURE CRANK/BB WEAR!http://www.loctiteproducts.com/products/de...48&plid=153 Used the whole lot near enough haha!! Quote Link to comment Share on other sites More sharing options...
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