The MTBer Posted January 14, 2015 Posted January 14, 2015 Hi guys I don't know if this subject is covered already but help would be appreciated. I started serviceing my bikes in Jan this year and my downhillbike is giving me some problems. The problem is with the BB- I noticed that the bearing in the BB is loose and that I can remove it, but the otherside(drive side) won't move.The loose bearing in the BB is making an awful sound and it is quite irritating. Now my question is how do I get the bearing back in the BB do that it won't come out again, a lot af pressure doesn't help ( it will go in but with a little tap it is comming out again)Should you be able to remove the bearing from the BB? The crankset: Truvativ hussefeltThe BB : Howitzer Here is some photos.
Guest DieBees Posted January 14, 2015 Posted January 14, 2015 Ask floatbox. He has a lot of knowledge.
The_black_stig Posted January 14, 2015 Posted January 14, 2015 Please read this thread firsthttps://community.bikehub.co.za/topic/13383-bb-external-bearings-the-cheap-rebuild/ sets of bearing will cost around the region of R250 depending on where you brought the bearing from & also the size of the bearings. also you'll need to check if your crank-shaft has been bended or not. you'll have to replace it if that's the case. (and it won't be cheap)
Spoke101 Posted January 14, 2015 Posted January 14, 2015 Check that the cup is not damaged or worn due to the bearing moving in the cup if ridden with the bb loose? Probably need a new BB.
droo Posted January 14, 2015 Posted January 14, 2015 Check that the cup is not damaged or worn due to the bearing moving in the cup if ridden with the bb loose? Probably need a new BB. This
The MTBer Posted January 14, 2015 Author Posted January 14, 2015 Actually not worn, think I only did 7km ( only tar) with the loose bearing. So I should probably start the hunt for a new BB...
JXV Posted January 14, 2015 Posted January 14, 2015 It came loose somehow and should be a press-fit (aka interference fit). The outside of a hard steel bearing shell does not wear down so the housing is prob. kaput if the bearing is loose. My 2c is on a new BB......sorry
Goodbadugly Posted January 14, 2015 Posted January 14, 2015 Loctite.https://www.google.co.za/search?q=loctite+638&espv=2&biw=1440&bih=775&tbm=isch&tbo=u&source=univ&sa=X&ei=-rW2VJ3ULuPX7Qb_jID4Cw&ved=0CC0QsAQ
JXV Posted January 14, 2015 Posted January 14, 2015 Actually I might be wrong above. Looked up the manual on the www. Left cup has a "slip fit" bearing while the right one is fixed. The manual does not say how to pre load the bb bearings other than torqueing the arms on. Try a new bearing to begin with but you may still need a new lh bb cup. When the other side goes you will need a new rh cup anyway.
The MTBer Posted January 14, 2015 Author Posted January 14, 2015 Loctite.https://www.google.co.za/search?q=loctite+638&espv=2&biw=1440&bih=775&tbm=isch&tbo=u&source=univ&sa=X&ei=-rW2VJ3ULuPX7Qb_jID4Cw&ved=0CC0QsAQI was thinking about it, have some Medium loctite, think I will use it for a temporary solution.
floatfox Posted January 14, 2015 Posted January 14, 2015 Looks like the same type of fitment as campagnolo ultra torque..just make sure that you apply high quality grease otherwise it will make a noise.
The MTBer Posted January 14, 2015 Author Posted January 14, 2015 Looks like the same type of fitment as campagnolo ultra torque..just make sure that you apply high quality grease otherwise it will make a noise.Do you think I must use loctite to stick the bearing to the cup?I only use this http://www.cwcycles.co.za/product/white-lightning-crystal-grease-tubeOr should I apply a lot of gease inside?
floatfox Posted January 14, 2015 Posted January 14, 2015 Do you think I must use loctite to stick the bearing to the cup?I only use this http://www.cwcycles.co.za/product/white-lightning-crystal-grease-tubeOr should I apply a lot of gease inside?That grease should work fine. If it was originally installed with locktite then you can, but I dont think so..you should see green locktite if any locktite was used. If not, just clean everything and ad grease. Also keeps water out..
JXV Posted January 14, 2015 Posted January 14, 2015 Do you think I must use loctite to stick the bearing to the cup?I only use this http://www.cwcycles.co.za/product/white-lightning-crystal-grease-tubeOr should I apply a lot of gease inside?Download the bb installation manual. It tells you where to grease
The MTBer Posted January 14, 2015 Author Posted January 14, 2015 That grease should work fine. If it was originally installed with locktite then you can, but I dont think so..you should see green locktite if any locktite was used. If not, just clean everything and ad grease. Also keeps water out.. Download the bb installation manual. It tells you where to greaseCool Thanks, no green loctite was used, will give it a good grease and ride with it untill I can find a new BB, then I will use this one as a backup.
floatfox Posted January 14, 2015 Posted January 14, 2015 Also put some copper grease on the thread before you screw the bb cups back into the bb..keeps water out and elimates creaking noises..if you dont have copper grease you can use a bit of the normal grease..copper grease works better though.
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