1000-1 chance

[Ken22]

While doing some therapeutic mowing with my ZTX 42 today a 1/2" rock came out of somewhere and I would guess the rock, PTO pulley and belt all converged popping off the belt and the rock lodged itself into the pulley.

 

[bertsmobile1]

Not all that uncommon
Now check the belt carefully for cracks that are th same length apart as the circumference of the pulley
Usually this wrecks the belt.

 

[Ken22]

Good idea. After I put the belt back on I did mark a spot and spun the belt 3-4 rounds. Looked okay. I suspect the belt came off immediately. What if I revise odds to 100-1.

 

[Rivets]

All depends on how much of a betting man you are. Also, take a second look at the pulley itself. Make sure there is not damage there. Any damage will cause premature wear and/or belt jumping off.

 

[Ken22]

Not a betting man and that's why the odds were so far off. I did have a look at the pulley when I dislodged the rock. The examinations were done in the field. I'll lift the mower up higher in the shop and have a good look at the belt and pulley with a good light. Good suggestions all. Thanks.