Gritty pulleys
Moderator: robbosmans
I’ve noticed lately my old 10sp Red RD pulley are making a lot of gritty noise.
I’ve seems some vids on how to remove it from the RD but what should I torque it down? 4nm or 5nm?
Also how do you guys go about cleaning it? In the past I just use a brush to brush it off without remove it from the leg, but it’s getting very noisy and maybe it’s time for a good cleaning.
Thoughts?
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I’ve seems some vids on how to remove it from the RD but what should I torque it down? 4nm or 5nm?
Also how do you guys go about cleaning it? In the past I just use a brush to brush it off without remove it from the leg, but it’s getting very noisy and maybe it’s time for a good cleaning.
Thoughts?
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if they feel gritty it's likely the bearings are dry/contaminated, you can clean and regrease...
remove the seals using a sharp pick, be careful to not bend/damage them, then flush out the old grease - for bearings i use an ultrasonic bath with degreaser, then follow up with detergent, then water, and dry quickly with warm air
now they are clean and without seals, you can see if they spin freely and do not feel rough
if ok, pack the bearings with good waterproof grease then replace the seals
for grease i use skf lghp 2, i got a cartridge of it years ago, use it for bb30, wheel bearings etc. - if you have the little syringe that sram supply it is filled with the same grease, it is a translucent blue colour
the mounting bolts have threadlock, i just tighten by feel - if the old threadlock is no longer active and the bolt turns freely i would put just a little dab of loctite 243 on to keep it secure
remove the seals using a sharp pick, be careful to not bend/damage them, then flush out the old grease - for bearings i use an ultrasonic bath with degreaser, then follow up with detergent, then water, and dry quickly with warm air
now they are clean and without seals, you can see if they spin freely and do not feel rough
if ok, pack the bearings with good waterproof grease then replace the seals
for grease i use skf lghp 2, i got a cartridge of it years ago, use it for bb30, wheel bearings etc. - if you have the little syringe that sram supply it is filled with the same grease, it is a translucent blue colour
the mounting bolts have threadlock, i just tighten by feel - if the old threadlock is no longer active and the bolt turns freely i would put just a little dab of loctite 243 on to keep it secure
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If it is a red Derailleur, please use grease that works well with ceramic bearings as those are in the RED jockey wheels.
If you want to see 'meh' content of me and my bike you can follow my life in pictures here!'Tape was made to wrap your GF's gifts, NOT hold a freakin tire on.'
sram use the grease i mention (as do ceramicspeed i believe), see the tech manual...
https://www.sram.com/sites/default/file ... -rev-a.pdf
you can pay a lot for a little...
https://www.sram.com/sram/mountain/prod ... ing-grease 10ml, retail around 3-4 £/€/$
or pay not much more for a lot...
http://www.wychbearings.co.uk/LGHP2x420ml_grease.html
...the 420ml cartridge is rather better value, and will last for many years servicing
https://www.sram.com/sites/default/file ... -rev-a.pdf
you can pay a lot for a little...
https://www.sram.com/sram/mountain/prod ... ing-grease 10ml, retail around 3-4 £/€/$
or pay not much more for a lot...
http://www.wychbearings.co.uk/LGHP2x420ml_grease.html
...the 420ml cartridge is rather better value, and will last for many years servicing
Ok I took the pulley wheels off and cleaned it. I don’t have ultrasound machine to clean. Any recommendations?
I wiped the caked layers of dirt and grim off, mount it back and rode today... still hear it squeak like a rusted wheel.
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I wiped the caked layers of dirt and grim off, mount it back and rode today... still hear it squeak like a rusted wheel.
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Did you lube?
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unclear if you removed the seals and flushed out the bearings - if you haven't got an ultrasonic cleaner you can dunk in a cup of degreaser and scrub with a small brush, or use an aerosol can of solvent/light oil to do it, all will be effective
Nifty, yup I lube it, but didn’t open the deal.
Sungod, thanks.. I’ll give that a try. I have some purple power degreaser that’ll clean it up.
But I’ll need to get the grease for it first.
I only have Phil Wood grease, and slide glide grease.
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Sungod, thanks.. I’ll give that a try. I have some purple power degreaser that’ll clean it up.
But I’ll need to get the grease for it first.
I only have Phil Wood grease, and slide glide grease.
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the jockey wheel would may also need replacing. A ceramic bearing that feels gritty could have race pitting. Replace the waste of time ceramic bearings with jockey wheels with a steel bearing if that the case.
just pop off the seals and flush them clean, then see how they feel dry (and without the seals)
as above if the bearings feel gritty dry then it's time to replace anyway, no need to get extra grease, if they feel smooth then grease them with the pw stuff, reseal and they'll be fine
btw i did a quick search, the pw grease is waterproof, so it should be ok long term - according to one report it's a repackaged exxon grease (mobilgrease 33), i.e. just as the 'sram' grease is repackaged skf
Been traveling too much due to work. Finally took it apart, clean and reinstall.
I noticed something funny about my RED 10sp RD.
Not sure if this is normal? Seems the carbon is bent? See the portion circled.
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I noticed something funny about my RED 10sp RD.
Not sure if this is normal? Seems the carbon is bent? See the portion circled.
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