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03-02-2010, 8:53 AM rEno83 Joined on 09-29-2008 Reno, Nevada Posts 948 Bearing in Case cover... Greetings all, During my weekend mission of replacing my (left) crankcase cover I discovered a bearing that needed to be swapped into the new case, the countershaft (end) bearing. I was surprised to see very little oil/grease inside when I removed it. During installation, I (stupidly/accidentally) got a tiny bit of dirt in there - enough to make tiny crunching noises when spinning. I vaccumed it out with my shop vac, hehe put some oil in it and slapped it back in. After thinking about it....I think I goofed here. I guess I have a few questions... Should there have been an adequate amount of grease in there?? Is this a bearing often replaced?? Is this bearing tough enough to just mash up that grit and be ok for a while?? I feel quite dumb after just placing it back into the case, without a proper cleaning and lubing...what might I expect now? A bearing failure soon, down the road? thanks, Adam thrashin' and crashin' w/ TW, always with a smile :) 06' TW 05' R6 "Freedom is Irrelevant, when Sovereignty is Absent" -Me.    Report

03-02-2010, 9:05 AM uktw125 Joined on 06-05-2008 Devon, England. Posts 143 Re: Bearing in Case cover... This bearing gets an oil supply pumped through the counter shaft from the engine oil, so no need to grease it. It might worth trying to wash it out with parrafin or similar solvent just to be safe. If it starts to fail I think you will get some warning, I don't think it will leave broken down and stranded by the side of the road.    Report

03-02-2010, 11:32 AM rEno83 Joined on 09-29-2008 Reno, Nevada Posts 948 Re: Bearing in Case cover... Cool, I didn't know that the oil flowed through the shaft, I was wondering how oil had made its way into the bearing... Jeepers, I feel I should clean it out. I just don't want to remove the bearing again and the stator and wire, etc... Perhaps I'll just remove the cover and clean it up in a month or two, when I service my sprockets, chain and get that bighorn...Maybe carefully spray the solvent into the bearing and tip it upside-down to drain, then vaccum it out - would this suffice? Perhaps just replacing it would be better at that point. Is there a wear point at which the bearing stops eating itself, once this dirt is crushed within the rolling balls?? OR, is this dirt going to simply eat em' up and then they wear even faster?? This bearing doesn't bear a whole lot of weight does it? It seems to be an end support for the countershaft with the internal countershaft bearing, bearing most of the pressure/support/weight?? Is this true?? thanks, Adam thanks, Adam thrashin' and crashin' w/ TW, always with a smile :) 06' TW 05' R6 "Freedom is Irrelevant, when Sovereignty is Absent" -Me.    Report

03-02-2010, 1:50 PM QWERTY Joined on 11-22-2006 Posts 2,360 Re: Bearing in Case cover... For peace of mind simply replace the bearing and seal when you do your sprockets. Cheap for a stupid tax.    Report

03-02-2010, 2:33 PM TW-87 Joined on 02-01-2010 Manitoba, Canada Posts 305 Re: Bearing in Case cover... I agree with Qwerty. That bearing does take a large load, that's why it's there. Under hard acceleration in first gear, it takes a huge load, especially if you're stuck in sand or gravel. TW-87 1987 TW200, 15/44 sprockets, DID O-ring chain, Award winning, "Quick Release" Action Packer :-))    Report

03-02-2010, 5:22 PM Arrowsmith Joined on 09-04-2008 Missouri Posts 114 Re: Bearing in Case cover... <BLOCKQUOTE><table width="85%"><tr><td class="txt4"><img src="/Themes/default/images/icon-quote.gif">&nbsp;<strong>rEno83 wrote:</strong></td></tr><tr><td class="quoteTable"><table width="100%"><tr><td width="100%" valign="top" class="txt4">Cool, I didn't know that the oil flowed through the shaft, I was wondering how oil had made its way into the bearing... Jeepers, I feel I should clean it out. I just don't want to remove the bearing again and the stator and wire, etc... Perhaps I'll just remove the cover and clean it up in a month or two, when I service my sprockets, chain and get that bighorn...Maybe carefully spray the solvent into the bearing and tip it upside-down to drain, then vaccum it out - would this suffice? Perhaps just replacing it would be better at that point. Is there a wear point at which the bearing stops eating itself, once this dirt is crushed within the rolling balls?? OR, is this dirt going to simply eat em' up and then they wear even faster?? This bearing doesn't bear a whole lot of weight does it? It seems to be an end support for the countershaft with the internal countershaft bearing, bearing most of the pressure/support/weight?? Is this true?? thanks, Adam thanks, Adam</td></tr></table></td></tr></table></BLOCKQUOTE> If there is still fumes from the solvent, do not vaccum it. Vaccum motors have sparks.    Report

03-03-2010, 12:34 PM rEno83 Joined on 09-29-2008 Reno, Nevada Posts 948 Re: Bearing in Case cover... Excellent! I shall replace when I have the cover open next time, especially since the parts are less than 15.00. I'm getting good at this removal anyway :P Could a large C-clamp push the bearing back in?? I don't really want to use a hammer and socket like last time, since I'll be leaving the generator in the cover during this operation. -Adam thrashin' and crashin' w/ TW, always with a smile :) 06' TW 05' R6 "Freedom is Irrelevant, when Sovereignty is Absent" -Me.    Report

03-03-2010, 1:01 PM uktw125 Joined on 06-05-2008 Devon, England. Posts 143 Re: Bearing in Case cover... I use a hot air paint stripper to heat the case and put the bearing in the freezer overnight the day before. The heated case expands and the frozen bearing contracts, this allows the bearing to be installed with only very light  force and sometimes they can be pushed in by hand, you have to act quickly though but at least you can be sure you won't damage anything.    Report

03-03-2010, 1:09 PM rEno83 Joined on 09-29-2008 Reno, Nevada Posts 948 Re: Bearing in Case cover... Yes, I did place this bearing into the freezer, prior to installation, along with hovering the (old) cover over the stove - great trick!! I wonder what else could be used to heat the cover?? Would a hairdryer get it warm enough?? thrashin' and crashin' w/ TW, always with a smile :) 06' TW 05' R6 "Freedom is Irrelevant, when Sovereignty is Absent" -Me.    Report

03-03-2010, 1:19 PM uktw125 Joined on 06-05-2008 Devon, England. Posts 143 Re: Bearing in Case cover... I doubt if a hair dryer would get hot enough. I guess the stove is your best bet. I was trying to think of a way of avoiding the big C-clamp as I would be afraid of damaging something, it's up to you how carefully you can do it really.    Report

03-23-2010, 1:43 PM rEno83 Joined on 09-29-2008 Reno, Nevada Posts 948 Re: Bearing in Case cover...another question So, During the interim (before I change my sprockets n' chain) while I still ride around with this little bearing, I'm wondering if by getting bad - could it begin to wear on other parts....like the counter shaft?? What would be some tell-tale signs of a major problem going on??? I can begin to hear a slight squeeking going on from that area, it could be my really cheap chain though. I'm kind-of a paranoid individual, if you can't tell. I just want to keep riding the piss outta TW - with no rest, but on the other hand I don't want to do harm that can be prevented.... wha-cha think?? thanks, Adam P.S. - Today I ordered a bearing, oil seal, and front OEM sprocket. I'm now on the hunt for a nice 52 OR 54 Rear sprocket and an O-ringer. Any suggestions or part numbers?? thrashin' and crashin' w/ TW, always with a smile :) 06' TW 05' R6 "Freedom is Irrelevant, when Sovereignty is Absent" -Me.    Report

03-23-2010, 8:32 PM QWERTY Joined on 11-22-2006 Posts 2,360 Re: Bearing in Case cover...another question EK 428SROZ has been a good chain for me. I use Parts Unlimited sprockets.    Report

03-24-2010, 4:42 AM mrgizmow Joined on 10-21-2006 Paradise, Calif. Posts 2,439 Re: Bearing in Case cover...another question Attachment: oiloutput.jpg Adam, I am a bit late with thi, sorry.   What ever is in that countershaft bearing can continue on it's way and into the engine.  The bearing is not the termination point for the oil.  That neat little ridge/web that you see between the sprocket cover and the stator bulge is the continuation of that bearing feed that allows the oil to return to the case.  I used that feed and return for my oil coil cooler.  Here you can see I removed a section of the return passage to redirect the flow.   Gerry   Be safe my Friend.    Report

03-24-2010, 7:21 AM rEno83 Joined on 09-29-2008 Reno, Nevada Posts 948 Re: Bearing in Case cover...another question Thanks QWERTY, I'll get that chain. Gerry, Whoops! Oh well, I can only hope the bearing crushed up whatever was in there fine enough for minimal damage to occur elsewhere. It really wasn't much dirt at all, perhaps just a grain or two of sand that fell into the bearing...I shall discontinue riding until further repairs :( thrashin' and crashin' w/ TW, always with a smile :) 06' TW 05' R6 "Freedom is Irrelevant, when Sovereignty is Absent" -Me.    Report

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