Why Does My Cranks Keep Coming Loose

Is there anything i can do. The steel axle will usually survive.

How To Stop The Arm Of My Bike Pedal From Repeatedly Coming Loose While I M Riding Quora

I looked around on other.

Why does my cranks keep coming loose. It seems like a design issue and Im not sure how to fix it. My left crank arm is always coming loose and i am fed up of constantly tightening it up. Id reckon the crank BB interface is compromised in some way which leaves the crank feeling snug and tight at.

What can cause the crank pully to keep coming loose. I am thinking of making a special pickle fork to go between the bottom bracket and the crank. It does NOT hold.

Blue Loctite but in a pinch any kind of glue works on the threads. Mar 12 2009 1 yeh my crank keeps on coming loose and i keep on tightening it what is happening is it going to. Could my bottom bracket be the source that my cranks keep coming loose.

If the arm is damaged no matter how tight the bolt is torqued it will not stay tight on the spindle. Square taper crankset develops play after changing bottom bracket If youve been repeatedly riding with a loose crank arm it could be that its now damaged. Jump to Latest Follow REVIEWS DEALS BIKESHOPS TRAILS.

You can tighten that bolt and everything feels fine until you start riding and putting pressure on the arm and it. Joined Jan 8 2019 7 Posts. Questions Answers Miscellaneous Questions My crank is always coming loose.

My right crank arm opposite side to my sprocket keeps coming loose and kept creaking and crackling so I buy new cranks because I thought it may solve the problems but the real problem is my bottom bracket. I do not really want to loosen the bolts and ride until the cranks break loose. 1 - 12 of 12 Posts.

The cranks are Race Face Deus about 3. Cleaned it all off the threads added some loctite thread lock and torqued it up. Dull I know but some of you seem to enjoy these techy questions.

Ive noticed that its almost always the left side. Crank pulley keeps coming loose even after I have replace the old bolt with a new one cleaned the threads and applied blue loctite and torqued to manufactures specsIs it possible to retap the crank and will it work or should I have it sent to the engineers to have it examined to see if it is not damaged eg excessive vibration on the crankunbalanced. Its on the non-drivetrain side.

Soz a bit off topic but ages ago my crank fell off. At first the bolt broke on the pully replaced the pully and bolt and washer drove the car 30 miles the bolt come loose replaced the bolt and washer again drove the car maybe 200 miles again the pully has come loose I bought the car in september I have nothing but problems. I bought a 2nd hand Trek Remedy and the cranks that were on it were fine till I tried to change the pedals which removed.

Given how easily I stripped a cranks pedal thread on a unicycle when it was unwittingly being ridden back to front a small wobble can do some quick damage. Discussion Starter 1 9 mo ago. I have truvativ isoflow chainset but i dont know what bottom bracket i have Anyway my left crank is always coming loose is this to do with the bottom bracket or the crank itself and if it is to do with the crank will this one fit.

This means the BB spindle is square and the hole in the arm is also square. When the crank loosens the arm rocks back and forth slightly rounding out that square. Why does my crank arm keep coming loose.

I have a 2016 Santa Cruz 5010 CC with the original raceface Cranks that have come loose a couple times since I replaced the bottom bracket 2-3 months ago. If youre dirt poor like me try the cheap and easy fixes first. Had my right hand crank bolt come loose a couple of weeks ago on my Rail 7 and also found the shaft and threads were full of grease.

My crank is always coming loose. Every time my brake light and charing light comes on. Done over 100 miles since and all seems good.

If an arm starts to wiggle it tends to damage the fit between the parts rather fast. The crank keeps coming loose now and i cant get it fully tight. Boring but useful to me thread.

Cranks are usually aluminium and the axle steel. Once cranks are loose its not difficult for the loosening motion to cause damage to the splines of the crank or the BB. Re-torqueing the bolt will keep the arm.

Why do my cranks keep coming loose. This is more apt to come loose than the right because of precession -- most crank bolts are right-hand thread on both sides but the motion of the crank arm relative to the shaft tends to loosen the bolt on the left side whereas it tends to tighten the bolt on the right side. One can of course try to tighten the arm but very often the damage means that the arm will continue to come loose.

Why does my left cranks arm keep on coming loose. Because my old cranks kept coming loose and my brand new stolen mob cranks keep falling off as. Hey you didnt mention if it was the left or right side that keeps coming loose.

Raceface cranks coming loose. Whats most likely happening when a bolt will not keep a crank arm tight on the spindle despite being tightened to torque is that the crank arm interface is damaged in some way. Start date Mar 12 2009.

I was thinking change the bolt. I would use the pickle fork while also using the crank. Why does my crank keep coming loose.

I also have a crank puller tool but the cranks do not come off. Mar 18 2009 at 1139 Quote. See this answer.

You could try tightening with lots of torque grease on the square taper and threadlocker eg. Story is as follows. By earlier 0 LIKES Like UnLike.

The splines on the crank arm can be ovalized or otherwise damaged if ridden when loose.

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