Looking a bit further

[Bernoff]

I had bought this sled late spring 2010. This fall I removed the primary thoroughly cleaned it and checked the housing on the PTO side. There was no grease residue. I thought at that time I was good to go. Not so. I think now that if you don't know the history of the sled, get a sled shop to look at it or take the bearing cover off yourself and possibly repack the outer bearing with the proper grease from BRP. I have included a couple of Pics. One pic has a white arrow painted on the housing. My question to those that may know is can a guy put some special grease in a syringe and squeeze a few mls through the fitting on the side of the motor casing to try to lubricate the second outer bearing on the PTO side? My motor has this fitting and am wondering what is it for? The second Pic is when it all goes really really BAD.

 

[Bernoff]

I took the bearing cover off another 06 800 and found that the isoflex grease was completely gone. The bearing still had oil residue on it but no isoflex. I am going to put this out to the motor minds out there, Is the isoflex grease only supposed to last a short time ( Initial Breakin ) and then degrade to allow only the oil to supply lube to the bearings? Also if they can answer the question to my previous thread about putting isoflex in a syringe and squeeze some through the fitting to possibly get some to the second bearing on the PTO side. Thanks Guys

 

[Bernoff]

Any Doo Goo-Roos can chime in if they may

 

[tex78]

WELL thats been a topick on dootalk for a bit.... some guys do it and some don't.... from what i have heard is that if there is too much in there when it gets hot it puke's it out the cap... also if the cap is there is psi's and blow it off... then ya have iso everywhere.... and the price of it is like gold everywhere....

before next year i will just put in a new seal and needle some between the two bearings...

 

[Bernoff]

Thanks TEX78, I can see what you are talking about, but what still concerns me is that when you add the ISOFLEX to the in interior(between the two bearings) there doesn't seem to be a DIRECT ROUTE to get the ISO RIGHT into the inner bearing... Im just concerned that just filling the void between the 2 bearings wont adequately lubercate the inner bearing.. Just seems like the only way to PROPERLY grease the inner bearing is to take the top ends off and do it that way, that just seems like WAY too much work LOL!!! Thanks again guy, any help is appreciated!!!!
Bernoff

 

[tex78]

ya i hear ya.... the best way is to split the cases but thats ton's of work...

i guess so is puting a crank it too...

 

[Modman]

Unfortunately I don't think there is another way to do it. The inner bearing is lubed from the oil injection and the outer bearing is lubed with ISOFLEX (at least that is what I've always seen). Is this not the case?

I thought that the inner bearing needed its "outer" seal to keep the crankcase pressure in, otherwise the pressure would leak out the bearing and go out the fitting you would be lubing through? Where are the seals in these bearings?

If the inner bearing seal is on the "crankcase" side, then I see no reason why you couldn't lube the bearings through the fitting into the void. Put a long tube (like 24") on the fitting so that the increased tube volume will allow it to expand and contract to any changes in pressure, and this will prevent the tube from popping off and blowing the expensive ISOFLEX everywhere. This would allow you to grease the PTO inner bearing from the void between the bearings.

Realistically, if the inner bearing has the seal on the inside (crankcase) side, and the outer bearing has the seal on the outside (behind the cover plate), I wonder why you could not just use regular injection oil to fill the void and lube the bearings? This is exactly what was done on a lot of motors for the two inner bearings between the cylinders. Both bearings were sealed to the crankcase sides and then an oil bath was located between the bearings to keep the bearings lubed. It would be the exact same thing here. If it was me, that is what I would be looking at doing if its possible, then you don't have to worry about replacing the ISOFLEX and so long as the tube has oil in it, then you;d know the bearings always had oil as well.