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By davem1111
I'm trying to figure out how to fix two problems:
1. Drive belt from PTO to deck keeps flipping over between the PTO and the mule. Everything looks okay, belt runs right between mule and deck. It cuts just fine, but I'm concerned that running the belt on its back through the PTO will shorten its life a lot.
2. PTO handle kicks off at random times while engaged. Not doing anything unusual, just cruising along mowing, and boom, it flips back. Missing spring maybe?
Any ideas?
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By Samone
I recently acquired a 520xi. She's a pretty sweet machine and I took a liking to her before she landed in my garage. I've used her a few times this spring to haul some brush around in her trailer.
As the grass grew taller, however, I knew it was time to put the deck on her and start mowing. Note: this is my first wheelhorse, and also this was the first time I'd mown with her. Anyway, I did about half an hour of mowing (about half of my lawn), having turned her pto on and off a few times for various reasons, when at some point I turned the pto off to back out from between the dead-end swath between 2 trees I had just mown. I backed out, turned around, lined myself up to get back on track with the mowing, pulled the pto knob, and....nothing. Or so I thought at first.
There is a quiet, though definitely present sound whenever I pull the pto knob on. At first I thought the blades might be stuck or something and the drive belt was sliding on the pto pulley. After some inspection, I found it wasnt. I prooved it wasn't by taking the drive belt off the pto and trying to turn the pto on. I still hear that same sound and the engine acts slightly stressed when I turn the pto on.
One last thing. I turned the engine off, took the front grill off the tractor and tried to turn the pto pulley. It moves but is stopped by some kind of what looks like a safety stop (a bar on the pulley hitting a bar in the way).
Anyway, this is where I'm at. If anyone knows or has any idea why what's happening is happening and/or how to fix it Id appreciate it very much.
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By Armin Buehlmann
Hi,
I read through a few related posts but my symptoms sound different.
Have an '89-'90? Wheelhorse 520-H, model 4120OE01.
When I engage the PTO, the engine stalls. No fault indicators.
However, everything else seems normal:
- all lights work when pressing 'TEST'
- when I engage the PTO without sitting on the seat, the engine also stalls, but the 'SEAT' light comes on. Normal.
- when I try to start the engine with the PTO engaged, it won't start and 'PTO' lights up. Normal.
- after disconnecting the load (2-stage snow blower belt in this case) from the PTO, I get the same problem, engine stalls immediately. PTO pulley turns along fine with the remaining motion.
And I also need to mention: the first time it happened it was intermittent. The tractor and snowblower attachment were used over a month ago, without any problem.This time got above symptom upon startup. I didn't feel like shoveling so after revving the engine for a minute or two and a few 'encouraging' words, it worked. I switched the PTO off and on several times afterwards with no problem (engine warm, obviously). Today, with the engine cold, the problem is back.
I think there's enough reason to rule out the PTO- and seat- switches. But what else should I check?
This is my first time writing in the forum and I hope I've given enough clues without boring you.
Any hints and advice are appreciated.
Armin
PS any good tricks to counteract the belt tensioner on the 2-stage snow thrower (model 79361)? It is a bear to connect and disconnect.
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