Need help with belt tension - HCS Snowmobile Forums

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Old 01-15-2011, 08:44 PM   #1 (permalink)
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Default Need help with belt tension

I have just put a new belt on my sled.It is a 2000 Polaris xc700sp.Thanks to this site i have determined that it is to tight!!When i loosen the three bolts on the plate to adjust where the belt rides in the sheave the plate moves freely and nothing happens.Is something stuck or hung up??I just bought this sled.It has very low mileage(980).It has been sitting for awhile!!Any help you guys can give would be appreciated!!!
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Old 01-15-2011, 09:55 PM   #2 (permalink)
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After you back off the 3 screws a little, rotate the plate and tighten the screws again. Lift up the rear of the sled and spin the track. You should see the belt drop down a little in the secondary sheave. I like to adjust the belt so if the sled is idling with the rear up in the air, the track just barely creeps.

If your belt is way too tight, are you sure your center to center is correct on the clutches?
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Old 01-15-2011, 10:10 PM   #3 (permalink)
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I just tried it a gain...Loosened the three bolts turned the plate all the way to #1 position.Still the same..How do i know what center to center is supposed to be and how do i adjust that??
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Old 01-15-2011, 10:45 PM   #4 (permalink)
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You aren't going to see any change until you tighten the bolts back down and spin the track a few revolutions.
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Old 01-15-2011, 10:50 PM   #5 (permalink)
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I have just put a new belt on my sled.It is a 2000 Polaris xc700sp.Thanks to this site i have determined that it is to tight!!When i loosen the three bolts on the plate to adjust where the belt rides in the sheave the plate moves freely and nothing happens.Is something stuck or hung up??I just bought this sled.It has very low mileage(980).It has been sitting for awhile!!Any help you guys can give would be appreciated!!!
how do you know the belt is to tight? when the sled sits on the ground idleing does the belt squeel or does the sled creep forward? if not the belt is probably fine. If it does then are you sure you got the correct belt? If so then adjust belt deflection. If you can't get it by changing belt deflection to the loosest position then you need to check clutch center to center and I beleive on the 600 and 700 big blocks it is supposed to be 12.5 inches
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Old 01-15-2011, 10:58 PM   #6 (permalink)
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You aren't going to see any change until you tighten the bolts back down and spin the track a few revolutions.
I did that.I tightened the bolts back up.Fired her up spun the track a bit and........NOTHING.Everything is the same as before!
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Old 01-15-2011, 11:00 PM   #7 (permalink)
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I did that.I tightened the bolts back up.Fired her up spun the track a bit and........NOTHING.Everything is the same as before!
how tight is the belt is it doing what I put in the other post?
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Old 01-15-2011, 11:00 PM   #8 (permalink)
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I think the belt is too tight because with the sled up on a stand the track spins.It don't just creep,it spins fairly fast.I seen on here in a diff post that the bottom of the grooves should be about flush with top of sheave.The grooves are out of the sheave.
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Old 01-15-2011, 11:02 PM   #9 (permalink)
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how tight is the belt is it doing what I put in the other post?
I will go put it on the ground and see what it does.....
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Old 01-15-2011, 11:06 PM   #10 (permalink)
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Originally Posted by Polaris700xc View Post
I think the belt is too tight because with the sled up on a stand the track spins.It don't just creep,it spins fairly fast.I seen on here in a diff post that the bottom of the grooves should be about flush with top of sheave.The grooves are out of the sheave.
The top of the belt should be about an 1/8th to 1/4 inch above the sheave. Is it a Polaris belt?
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