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Old 03-25-2009, 05:06 AM   #1 (permalink)
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Jackshaft bearing

Hi folks, I've got an '08 Polaris 600 RMK. I want to get some grease into the bearing on the jackshaft. There's a decal on the airbox that says grease the jackshaft as per the owners manual. The owners manual says to grease the jackshaft. Not much help there. How do I access the fitting to to this. My buddy has an 07 RMK, and he got his with a needle my removing the airbox. I took out my airbox, but I'm not seeing anything. Any help? Thanks.
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Old 03-25-2009, 08:42 AM   #2 (permalink)
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I wouild like to know this too. I asked the mechanic at the Polaris dealership here, he had no clue as to how to get grease in there. Irritating, to say the least. It sure would be nice if they made things EASY...
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Old 03-25-2009, 10:16 AM   #3 (permalink)
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You use a needle and slip it under the seal.
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Old 03-28-2009, 07:20 PM   #4 (permalink)
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You may have to remove your secondary to see a grease nipple, pretty easy to do!
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Old 03-28-2009, 10:23 PM   #5 (permalink)
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There is no grease nipple on the bearing retainer. There is no small hole to grease with a needle. About the only way would be to remove the retainer and do like RJ said and slip some grease under the seal. What a pain in the butt. Especially when the label says to make sure to grease the bearing. Sometimes Polaris is such a treasure. At least the jackshaft bearing does not fail as frequently as the driveline bearing!
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Old 03-28-2009, 10:44 PM   #6 (permalink)
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These bearings are sealed on both sides and considered "sealed for life". This means the engineer who calculated the life of the bearing for this application figured it would outlast the normal life of the sled. This can save the manufacturer a whole lot of money on installing a grease nipple but causes the mechanic in all of us a little worry.

If you bother to take it apart to grease behind the seal, just replace the bearing instead. That way, you are sure the seal isn't damaged. Make sure you buy the same type of bearing with two seals or modify the flange housing to accept a grease nipple.

For your own peace of mind, change the bearing every five years or 5000 miles just to be sure. Modify the schedule as you see fit.
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Old 04-01-2009, 12:02 PM   #7 (permalink)
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I was at the service shop the other day and he said the same thing, no lube needed, the bearing will outlast the sled. They could save money by not putting a decal on that says to grease a sealed bearing. LOL Thanks Guys
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Old 04-01-2009, 07:14 PM   #8 (permalink)
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AND keep us guys from worrying that we aren't maintaining our "babies" the way the manufacturer intended. Gawd.
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Old 10-31-2010, 08:19 AM   #9 (permalink)
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hey Dan i was searching jackshaft posts and i found this one, i think my jackshaft bearing is bad! the outsude race is turning in the aluminum holder or cassette i noticed the play when i was fooling with the belt, 3200 miles hopefully it all slides of easy
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Old 10-31-2010, 10:15 AM   #10 (permalink)
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If the outer race is spinning, the bearing is seized. Plan on changing it out. Check the track driveshaft bearings as well.
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Old 10-31-2010, 11:53 AM   #11 (permalink)
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What Ultra said. I hope you caught it before the damage was toooooo bad...
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