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Creaking bolts in yokes |
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andyisavinit
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Joined: 06 Apr 2015 Location: Bracknell Status: Offline Points: 525 |
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Topic: Creaking bolts in yokesPosted: 08 Mar 2022 at 09:05 |
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I'm not sure what to do - whether to add lube of some sort or just try cleaning the holes and bolts.
So I have my forks out and haven't got round to reassembling yet but the last time I did this the bolts were creaking as I did them up. My concern is that with this creaking and kind of jumping/jutteryness of the bolt, the torque will not be right. The bolts that are doing it are in the yokes and even the pinch bolts at the bottom of the fork legs. Not all of them though. I did a bit of a google search but as usual it comes back with differing points of view and I couldn't find much either. So is adding a touch of oil or penetrating fluid or even WD40 a bad idea? Should I try and clean everything with brake cleaner so its all dry after still? Does adding lube screw up the torque settings because it won't be dry? Are my bolts f@#ked? Oh... bike is RSVR Mille 03 ohlins. Hope you can help
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Spoonz
Admins Group Joined: 11 Feb 2008 Location: North Devon Status: Offline Points: 10957 |
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Posted: 08 Mar 2022 at 09:47 |
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Sounds like there is some gauling going on. Something to lubricate the threads won’t hurt but I would check the bolts for corrosion etc. Me personally I would use a tiny bit of grease.
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Bladerunner919
Premium Member Joined: 19 Mar 2020 Location: Bracknell Status: Offline Points: 405 |
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Posted: 08 Mar 2022 at 09:52 |
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Hi Andy, do you think the threads could be damaged? Do the bolts look ok? I'm happy to pop over and give an opinion if that would help?
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andyisavinit
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Posted: 08 Mar 2022 at 09:54 |
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Yeh grease or copper slip? I'll show them a bit of wire brushing too.
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andyisavinit
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Posted: 08 Mar 2022 at 09:56 |
That's very kind of you to offer. I'm working now so will have a good look this evening and get back too you. You local ish?
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Bladerunner919
Premium Member Joined: 19 Mar 2020 Location: Bracknell Status: Offline Points: 405 |
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Posted: 08 Mar 2022 at 10:22 |
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You have my pillion seat, so you know where I am!!
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andyisavinit
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Joined: 06 Apr 2015 Location: Bracknell Status: Offline Points: 525 |
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Posted: 08 Mar 2022 at 10:59 |
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hahaha
I thought that might be you. Didn't recognise the Bladerunner name. How are you? I'm still looking after it nicely for you.
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426hemi
Premium Member owner of the big bore! Joined: 30 Mar 2012 Location: cannock Status: Offline Points: 5795 |
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Posted: 08 Mar 2022 at 11:12 |
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Probably very dry and you can get a bit of corrosion sometimes from the different metals being together, brush the threads clean and a little bit of copper slip and if torquing them back the setting off slightly as the copper slip can cause the threads to over tighten.
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Stevex
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Joined: 05 Jul 2016 Location: UK Status: Offline Points: 1481 |
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Posted: 08 Mar 2022 at 11:32 |
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I use small amount of grease on all fasteners, especially in aluminium.
You use a torque wrench on the fork and yokes bolts, right?
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People say I don't know Jack Sh1t; but I do, he lives next door.
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andyisavinit
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Posted: 08 Mar 2022 at 11:43 |
Yeh using a torque wrench. Grease or copper slip as hemi said. Makes sense also to back off the torque setting a tad too.
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Tifa
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I am Sparticus, only uglier Joined: 21 Apr 2009 Status: Offline Points: 1972 |
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Posted: 08 Mar 2022 at 11:49 |
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Yep, be really careful torqueing up lubed threads. So easy to strip them out. As a general rule of thumb, you can reduce the torque by about 20% and still achieve the same level of 'tightness'. However the reverse is also important, as lubed thread will be much more likely to come undone. If it's a critical part, say like a caliper mounting bolt, it's good practice to use a small amount of security check paint. |
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andyisavinit
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Posted: 08 Mar 2022 at 12:00 |
Forks in yokes is pretty critical. Maybe not quite so critical as break callipers though. I have had a caliper come completely free once. I was extremely lucky not to have the wheel lock up on me. I'll go very easy on any grease I add.
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