Snowthrower engine pulley turns but traction belt does not

aengineerApril 28, 2013

Hi,

This problem is for a Craftsman 536.887990 snowblower. It seems to have gradually lost traction - occasionally it might still move but more often it does not. One thing I noticed is that when I engage the traction lever, I can see the engine pulley still turning but the traction belt stops turning (it might turn for a sub second, then stop again). It almost seems that the belt is slipping when the traction lever is pressed and the swing plate comes in contact with the friction wheel. The swing plate is in good shape and the friction wheel is also OK - there are some cracks in the rubber but I am not convinced if that is causing the loss of traction.

Additionally the "traction drive spring" that sits behind the traction drive idler pulley is broken. My thought is that while this should be replaced, its not the root cause.

Any suggestions on what the root cause is. I am going to try and replace the traction belt in any case, but if someone has a better suggestion, please let me know.

Thanks
Aspi

Thank you for reporting this comment. Undo
rustyj14(W/PA)

Well, don't worry about the traction drive spring being broken--it was just put in there to make the machine look pretty, when using it, and pushing it along! Yes, the factory had a zillion of those springs in stock, so they just hung them in the works, to get rid of them!
I hate to think of how this country will be doing, in a hundred years, with that kind of thinking! RJ

    Bookmark   April 28, 2013 at 2:54PM
Thank you for reporting this comment. Undo
baymee(LehighValleyPA)

If I understand you, the idler pulley spring for the drive belt on the front of the mower, is missing. That belt needs constant pressure on it, provided by the spring and idler pulley.

    Bookmark   April 28, 2013 at 7:06PM
Sign Up to comment
More Discussions
Honda Snowblower will not move in neutral
Hi everybody, I am a newbie to this forum. My Honda...
buttonperson
Craftsman Snow Blower - Drive problem
During our big storm last week i noticed I started...
rspin
Snow Thrower impeller
I have a Craftsman 9 hp dual stage snow thrower, that...
fjs001
Any Good Electric Brushcutter?
I have a small area, my lot is just 1/2ac and less...
InFlux
Older Troy Built Tiller Model ID
Trying to indentify model number of my unit. It is...
gardenerfrank
© 2015 Houzz Inc. Houzz® The new way to design your home™