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my sears snowthrower attachment, model 842.260063. the long v belt keeps slipping out from the tension pulley. How can I fix this problem

The belt seems to work fine when its brand new. After a few uses it wants to slip off the tension pulley. I dont know if I have it adjusted to tight or what. The snow I was throwing yesterday was very deep, almost 20" plus it was run off from a snow plow. Any suggestions are helpful

Snow Removal Equipment
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3 Answers from these members:
Manage My Life
Having problems with a Snow thrower can be rather challenging. I have taken the time to do research on this particular issue and did find some useful information off of the Manage My Life website. While you are waiting for an expert to reply I have attached a few links below. Hope you find this information useful.
by Manage My Life
February 3rd, 2011
Answered in 58 minutes
0 votes
Sam A
Thank you for your question.

I can understand why you are concerned with the belt jumping off.

I can see why the belt jumped off this time with the heavy snow. You may need to go slower so you are not putting so much stress on the drive belt.

Since this unit has some age on it I would check all the idler pulleys and there alignment on the jack shaft housing.

I do not think you adjusted them too tight, those belts will start jumping in the pulleys and through themselves off. Check the pulleys to make sure they are evenly gapped all the way around the pulley sheave.

Thank you for using Manage My Life.
by Sam A Earned 1,182 community points in Snow Removal Equipment
February 4th, 2011
0 votes
Manage My Life
You did not mention if the "new belt" was OEM or a belt you purcahsed elsewhere. A common issue with these snowblowers is purchasing the wrong type of belt. It must be a clutching belt, one that is fiber reinforced such as a Kelvar or Aramid cord belt. Gates calls it a "power rated" belt, however only up to 100" size. A local mower shop should be able to find one. I purchased gates belts the correct size under their "Hi power II" brand and had the same issue. When I swithed to a aramid cord belt the problem went away.
by Manage My Life
February 9th, 2011
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