Make sure both the idlers and tensioner pulleys remain aligned, i.e. pulley bearings and tensioner arm aren't wore out.
Possibly one of the transaxle is moving out of place. Check mounting.
You might try raising both rear wheels of the ground and then see if belt throws.
SOURCE: Replacing drive belts on Sony TC-WR535
I do not see pink long screws on my tc-wr535. Can you please be more specific on accessing drive belts. Thanks
SOURCE: auger belt on snow blower keeps coming off
if shop just repaired it, go back. Right belt? Tensioned enough?
SOURCE: 826LE Power Max Snowthrower_ Drive belt keeps coming off
part # 94-8812 is traction belt 106-4498 auger belt
There is a service bulltin on this I have not seen this yet, Ill paste it for you to look at .
this was issued dec 22-2003 you would think that it would have shown up as a problem by now.
UNITS AFFECTED: Model Number(s): Serial Number(s):
38620 240000001-240999999
38621 (Int'l.) 240000001-240999999
38632 240000001-240999999
38635 (Int'l.) 240000001-240999999
38642 240000001-240999999
38645 (Int'l.) 240000001-240999999
38652 240000001-240999999
SUBJECT: Traction belt jumps off the pulley.
SITUATION: Incorrect pulley alignment causes the traction belt to jump off, usually when the drive is disengaged or as a hill is crested.
CORRECTION:
1. Remove the belt cover, engine belt guide and the bolt securing the crankshaft pulley.
2. Remove the auger brake assembly.
3. Remove the crankshaft pulley and the auger belt.
4. On the left side of the machine, remove the hair pin cotter from the speed control link and slide the link out of the pulley pivot assembly. The traction belt can now be removed.
5. Shorten the pulley half nearest the engine (PN 106-7334) shown in Fig 1. Grind or machine 1/8” (.125”/3.2mm). from the hub end of the pulley. The new finished length of the pulley half should be 1.07” (2.7cm).
6. Chamfer the bore to ensure the pulley fully contacts the shoulder on the crankshaft. You can send the pulley to an outside machine shop if you do not feel that you can modify the pulley in house.
7. Reinstall the pulley with a new traction belt.
A. Chamfer edge after grinding/machining.
B. Remove 1/8”.
C. Masking tape used as a reference line.
8. With the engine off, engage both the traction and auger levers and inspect the alignment of both the auger and traction belt idler pulleys (Fig. 2). Since we have moved the crankshaft pulley it may be necessary to bend the idler arms slightly to center the belts. Adjust as needed.
9. Install the engine belt guide and test operate.
10. Install the belt covers.
PARTS: P/N 94-8812 Traction Belt
SOURCE: Keeps throwing the belt off
I had the exact same problem, except it was shredding the belt as well. It even jumped off the pully after just distance down the road. Come to find out the idler (which had been changed out with what was "supposed" to be the right one) was the wrong one. It looked right, but after changing the idler out we have not had this problem again.
SOURCE: I have 2001 Husqvarna lawn tractor model YTH1746 wnt go into gear
those fluid drive transmissions fail on quite a few brands as they all use the same ones....replace the trans...they are expensive but still cheaper than a new mower.
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