I have a Sears two stage snow blower. It's maybe ten years old and has a
new engine. It works fine with one exception. The belt to the augur will
slip off the flywheel for no apparent reason. I was ploughing today. I got
80% of the job done (about 40 minutes work) when suddenly, no augur. You
open it up and the belt has jumped off the drive wheel. This has happened
several times before. So far as I can see, the tension on the pulleys and
the little guides are set properly. Running it with the cowling off,
everything seems to work just fine. In fact when I got the belt back in
place...no easy task with bare fingers in 5 degree weather...it ran just
fine for the balance of the job. But I know it will happen again.
"14 whiskies... A record, I believe."
Dylan Thomas' last words.
There could be any number of reason and causes,
misaligned pulleys, a non-obvious failure in the belt or stretch, loose nut
behind the controls <grin>
The most obvious thing I would do is replace the belt, probably under $15,
after that you've got to check bearings on the pulley shafts. They could be
worn just enough so that under strain they allow enough shaft movement to
throw the belt.
I find that if I try to move to much snow at once that's when the older snow
throwers act up. But you don't need me telling you how to use your machine.
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