I have a 5hp 23" Craftsman Snowblower which just had its traction belt
break. When I opened up the bottom of the snowblower there was a loose
spring in the bottom. I cannot figure out where it is supposed to go,
but the treads still do not spin. It looks like one end would attach to
the pulley which should cause tension on the belt, but I can't figure
out where the other end would attach. Does anyone know?
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1) Look for obvious pulleys out of alignment. Most pulleys on a drive system are 'keyed' and have a set screw or bolt holding them into position.
2) Most traction belts turn with the engine, so it turns all the time. Look for an idler pulley with spring attached that may be out of alignment.
3) Inspect the 'V' groove of the driven pulley for any foreign debris.
4) Inspect the driven pulley for damaged caused by another pulley or object striking the edge of the 'V'.
Check the steel axles that go through the plastic wheels.What happens is the axles rust and swell not allowing the track wheels to turn freely.its a problem overlooked by all the so called small engine repair shops.I have removed the wheels and sanded the axles to remove the rust.I greased the shafts and the wheels move freely.There is a provision on the wheel for a grease fitting.I carefully drilled the holes and with some strong waterproof glue thredhed a fitting in each wheel.
First thing I would check is to make sure the traction drive belt didn't fall off or break. To do this remove the plastic shroud between the engine and the snow chute. The traction belt is the one closest to the engine.If it isn't broke Make sure it is on the upper and lower pulleys.
I had the same problem with my 5HP Dual stage (C950-520240) Canadian model and found that the arm connected to the traction cable (part #85449 "Shaft Traction Clutch") which forces the friction disk up to the rubber friction wheel had a cracked weld and had bent, preventing positive contact with the rubber friction wheel. The drive wheels would turn if you lifted the back of the machine off the ground, but would not work if under load. First I replaced the belt and rubber friction wheel, but no go. I had to basically disassemble the whole drive assembly to find the problem, very frustrating because you could not see the crack in the arm from head on. I had the cracked and bent arm straightened and welded, all is OK now.