Not the same mower, but I've had tensioner pulleys go bad that didn't sound or feel bad. Just had the slightest vibration that was throwing belts I guess. Good luck.

 

http://www.c-rproducts.com/downloads/pdfs/guide_vbelt_troubleshooting.pdf

 

Mine did the same thing. The hydraulic motor to the wheel came loose. Some of the bolts either came out or they broke off. When I would put the belt back on, it would cut fine until i stopped to change directions. Hope this helps. I have the Husquvarna PZT.

 

Today got a job with this Husqvarna LTH 130 42' cutting deck

It is throwing the drive belt , been called out a couple time now last Wednesday put a new genuine husky belt on , Old one was stretched & had come off , today that new has come off,

Checked the front belt guide was good belt on engine pulley

Run where it has to go, No play it the pulleys bearings

The clutch push rod has some play in it , everything else looks ok

WHAT ELSE WILL CAUSE THIS ???

Got a feeling it the way it been operated BEEN used when he pushes the pedal in taking his foot straight off allowing it bounce back.

Make sure the transaxle is bolted solid to the frame. If it's loose the axle can rock and throw the belt.

Scott

 

Had put it back together last Friday only to get another call today saying the belt was smoking & has broken.

Checked everything all tight looks to be inline replaced the idler pulley was a bit worn .

I think it is the operator here, he's rough on the pedal meaning he allows it springs back he thinks its just a brake not realising that operate the transmission & the belt .

 

Had put it back together last Friday only to get another call today saying the belt was smoking & has broken.

Checked everything all tight looks to be inline replaced the idler pulley was a bit worn .

I think it is the operator here, he's rough on the pedal meaning he allows it springs back he thinks its just a brake not realising that operate the transmission & the belt .

That's a problem, not telling you or anyone what to do but I have learned to think and plan ahead a little, that is... Once I engage that belt I don't want to have to disengage it for much at all, preferably not even once until I am done mowing the entire yard. For exactly that reason, engaging and disengaging that belt is some of the hardest wear and tear it gets put through, so the less of that I have to do, the longer my belts seem to last.

At $50 to $80 a belt you can believe me I want that belt to last me a number of years.
Unfortunately machines aren't fool proof, we do have to operate them a certain way for parts to do their best.
You may have to explain to the operator the connection between brake pedal, belt tension, and wear and tear.