Sealed Bearings or not

[J1635]

Hey, so i took apart my chaincase on my Nytro the other day to check the bearings, and i found that most of them were NOT sealed on either side... Now since the forum was down last night i did some reading on other pages and i found lots of people asking the same thing, even Ski-Doo guys were saying they had bearings that were open.

Now my question is, the only one that was sealed was the lower shaft bearing inside the chaincase? - this makes sense as it keeps the shavings and garbage in floating in the oil pool out of the bearing but allows enough oil to weep through to keep the bearing lubed, however the other side of that bearing is open to the outside of the chaincase. Granted there is the rubber seals that the shafts slide through. I took everything apart for a track change and jackshaft bearing change which ive done, but now im going to put it back together i want to make sure if i need anything ill just do it now.

i added some pictures, you can see the one bearing with the seal on the oil side, the rest of the bearings i just cleaned and repacked with some viperlube, im just worried that without the bearingseals its just gonna throw that grease right out of the bearing?

or if you guys can tell me its no problem to leave those open and i just have to open it every season to repack with grease then i will definitely do that

 

[Sasquatch]

Looks right Top bearings are lubed with oil and have oil seals on the outside of them. The bottom is sealed with a dust seal to keep grit out and has oil seal outside of it. I have put a small amount of grease on that one upon reassembly! The grease will wash out of the bearings and do no harm. I have never packed the bearings with grease on the top. I have cleaned and repacked the ones on the clutch side every season.

 

[J1635]

Looks right Top bearings are lubed with oil and have oil seals on the outside of them. The bottom is sealed with a dust seal to keep grit out and has oil seal outside of it. I have put a small amount of grease on that one upon reassembly! The grease will wash out of the bearings and do no harm. I have never packed the bearings with grease on the top. I have cleaned and repacked the ones on the clutch side every season.

you can see i did repack them all, should i clean them out and just leave them then? it worries me that they will not be greased for awhile until the machine has a chance to start splashing around and physically moving that chaincase oil around, perhaps ill run it for a few hundred km then do a chaincase oil flush.

I cant see grease and 75w chaincase oil being a problem if it mixed though

 

[Sasquatch]

I don't think it is a problem the grease will mix with the oil and become oil. I always grease the oil seals lightly for assembly so they don't run dry and get hot first run.

 

[thor452]

you are all good dont worrie about the grease wont hurt a thing and the berrings are how they are supose to be keep the seal on the oil side on the botom one so no shavings get in it.