Why Does My Crank Bolt Keeps Coming Loose

Agustus 31, 2021 Posting Komentar

Remove all belts that are driven by the crankshaft pully and then grasp the pully to see if it is loose in some way. Thats because the spindle the axle the crankarms spin on is made of steel and the arms are aluminum.

Left Crank Arm Coming Loose General Bmx Talk Bmx Forums Message Boards Vital Bmx

The first time it felt loose I only tightened it and it was allright and then it came loose again and replaced the crankbolt.

Why does my crank bolt keeps coming loose. The crankshaft pulley is bolted to the front of the crank shaft by either 1 large bolt and thick washer or by 4 small bolts around the edge of inside of the pulley depending on model. As someone pointed out above with a newly fitted crank it will bed in and needs regular tightening for a few days. Cleaned it all off the threads added some loctite thread lock and torqued it up.

One other thing I just thought of. The issue with that type of crankset is that riding the bike with either arm being loose at all starts causing permanent damage. Coat the threads of the new bolt with blue loc-tite and torque the new bolt to 240ftlbs.

Done over 100 miles since and all seems good. The left crank arm keeps coming off the bolt keeps coming loose. It doesnt have to do with quality.

Try putting them on more firmly by pressing the opposite side of the BB to which you are putting the crank on up against a post or anything solid to give it a solid backing then bash. I have replaced it with a new one which had some grip on it but it came off this morning and had worn down quite a lot. If the damper came loose onec.

Use the old bolt to seat the new pulley and torque to 240 ftlbs. I would suspect that the Bolt is Stretchy threads may be worn or you are using the wrong bolt and washer. -if your crank is developing the profile wobble check and see if when the bolts are tight if the crank arm can be moved up down on the spindle slightly not side to side this indicates that your splines are wearing out is why it keeps coming loose-if your threads in the spindle and the bolt.

Tags bolt coming crankshaft loose pulley. Its happened to me twice now in the 5k miles Ive put on it since the install. Nov 9 2001.

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. You can try locktite but Ive had no success with that either. It lasted for about 2 months when I went for a weekend outride the left cran.

If your cranks are square taper once youve had them come loose youll have dammaged the taper and they will keep coming loose. These things should not back out. Browse other questions tagged mountain-bike repair crankset jumping bolt or ask your own question.

If youve been repeatedly riding with a loose crank arm it could be that its now damaged. Just got a new crank and it came. I cranked everything down to what I thought was the about the right torque value I dont have a torque wrench and went for a.

Figured this would be better because I can. Why does my crank arm keep coming loose. Most likely these screws are either stripped or damaged and no longer apply enough pressure to keep the crank arm in place.

Unless you are constantly twisting over 8000 RPM. Will my road crank fit my MTB or my MTB crank fit on my roadcross bike. Joined Aug 2 2008.

What is going on. Chris From your description of a worn down bolt it sounds like a loose bolt may have led to a rounded arm. Guardian and lately my non-drive side crank arm bolt has been coming loose.

You need a new crank. My crank arm keeps falling off even after I re-install it to proper torque. Blue Locktite is good but you must leave it cure before running the engine.

An out of round pulley could cause a vibration but most that I see have a locking tooth that you need to line up. If that is bent or damaged that could be causing the problem. A stripped crank thread and a rounded out arm hole.

Hi to all. The fact that your crank arm gets undone means that. You may have bent the snout of the crank.

Crankshaft pulley bolt keeps coming loose. Ive got a 1st gen. Ask Question Asked 2 years 1 month ago.

Ive been using a stronger grade 109 bolt than the 88 grade bolt that came with the PC kit. Hey guys Quick question I thought someone here might have some insight into. Yes in most cases you can.

Cranks For Shimano Ep8 Motor Mountain Bike Reviews Forum. Octalink Crank Bolt Keeps Coming Loose Hi All I just installed a Shimano 5500 splined BB with a hollow spindle and a Shimano 105 Triple crankset FC-5505. Can you tell me what works.

I have a truvativ stylo gxp crankset with a left crankarm that keeps coming loose. I have done this on over 20 LS1 cars and have never had a pulley come off even on my. So thats a square taper crankset.

Active 2 years. I cranked it down before a ride and then after a 7 mile fairly rough ride last night it was pretty loose. Left crank keeps coming loose.

Jump to Latest Follow 1 - 8 of 8 Posts. Im not sure if theyre screwed yet if you havent done anything particularly harsh to them while theyre loose they shouldnt be too damaged. I would start by replacing the crank pulley and re-torqing the bolt.

Anybody else with a Procharger Stage 2 have their crank bolt come loose. Im not sure what bottom bracket type I have but I have measurements from my frame. Remove the old bolt and toss it in the garbage.

Crank Arm Loose Squared Taper Can It Be Fixed Bicycles Stack Exchange