jack shaft bearing life ??

Yamadooed said:
Yesterday would be good... I,ve seen em go well over 10000 but yer on borrowed time...
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I agree. I would change them at the mileage you are at.

Doing the work before they fail on you while out on the trail is a good thing.
They call it preventative maintenance because it prevents you from getting stranded:)
 
If the jackshaft bearing is removed periodically, cleaned and regreased, it will last as long as the sled. The reason why these bearings fail is becuase they are a sealed bearing which is interpreted as maintenance free. If you take the bearing out, you can remove the seal with a dental pick. Clean the grease out with a solvent and repack it with a synthetic grease. This goes for the drive axle bearing as well. These bearings come with a small quantity of cheap grease and the seals will allow water in the bearing. As the grease dries out, the bearings begin to rust then the end is near. The first thing I do on all new sled bearings is to remove the seals, clean out the cheap grease and repack them with synthetic grease.
 
what Jim said is true,but i use a needle greaser slide it between the seal lip and inner race,give a few pumps move to the next one,they will last many many miles that way but if it's never been done at all i would be worried.
 
Closing in on 10,000 miles on the original jackshaft bearings.I have greased as Daman stated once in a while, this fall when I checked everything out they were still smooth with no play so I'll run 'em some more.
 
SWEDE said:
Closing in on 10,000 miles on the original jackshaft bearings.I have greased as Daman stated once in a while, this fall when I checked everything out they were still smooth with no play so I'll run 'em some more.
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;)! on that
 
I'm convinced that no matter what supplier you get the jackshaft, drive axle, or bogie wheel bearings from, they all do not have the right grease in them for sled applications. The reason all of these bearings fair is from water getting in them, washing out the grease and the balls and races begin to rust and pit. The bearing fails quickly afetr that process starts. The seals on all of these bearings do let water get in, a small amount, but enough to start the problem. Not matter who I get bearings from, I remove the seals with a dental pick, clean out the original grease and repack them with a synthetic grease like Mobil 1 grease. Most of the bearings on my rear suspension are original, with 13,000 mile son them. Try this process, your bearings will last a lot longer.
 
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