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Gearbox Question

Fawteen

Fawteen

Well-known Member
Location
Downeast Maine
I recently picked up an oddball Italian tractor. I got it mostly for a trailer tug, but it does have a 3 point hitch and a PTO.

Problem is, the PTO turns opposite to US standard (CCW as viewed from rear of tractor)

Assuming I could find appropriate blades for my finish mower, what would be the consequences of turning the gearbox backwards?

First thing that occurs to me is gear lash/clearance issues but are there other concerns?
A video of Guido, the articulated Italian Tractor.
 
I would tend to be more concerned with the nuts holding the blades backing off then the gears. Gears should be pinned or trapped. IMHO
 
Might be several things;
Is there a big nut holding on the stump-jumper? Might come off.
Are gears designed to have force one way, but not the other way?
Something tells me not to try it. There's a surprise out there.
 
So how is retirement, you lucky guy?

It might be easier to find a gearbox and stub shaft to provide the correct rotation for the PTO.
If there was an American/SAE version of the tractor, there might even be OEM parts to change the rotation.
 
I'm lovin' retirement! Staying busy as always, but on MY schedule, which is a new experience for sure.

AFAIK, the Pasquali was/is a gray market machine, no US Standard models. Could be wrong about that tho.

Working on the gearbox issue separately, just trying to cover all the bases.
 
I don't know why no one else mentioned this, but a mower rotating the opposite direction would want to throw material out the right side. There's a yoo toob video of a home-made mower with the back open and both sides closed.
 
Woods made (still does?) finish belly mowers for both left and right rotation. I don't know if either was available for rear mount. Problem would be they are all belt drive. Although I have seen rear mowers with a gearbox/pulley belt drive.
 
Farmall cubs are reverse rotation,with a smaller diameter shaft. They had IHC and Woods bellymowers available. I had one with a belt driven small rototiller. Perhaps the belt corrected the rotation.
 
Toro built a lot of left hand turning mowers with discharge on left side. I happen to have one with a left running gear box. My no. is 325 642 7647. I can prolly be talked out of the gear box.

Dave
 
You can also take the gear box apart and move the driven gear from top to bottom or vice versa and change the out put shaft direction IIRC. Seems I remember doing that once.
 
Reversing the blades is one thing but the problem is the bolts that hold the blade will spin loose because of the rotation
 
I have a very old dual spindle 8 foot & over 10 years ago I flipped the center gear box & swapped the left & right boxes and it now windrows at center rear, but that is about the only difference observed. It would be back to normal if had a tractor with reverse rotation PTO. Nuts don't unscrew because there are cotter keys.
 
I think you are overthinking it. The gears are pretty simple, they don't care if they are going left or right. Backlash is necessary, otherwise the gears wouldn't work work at all, the backlash is designed to be accommodate the stacked manfacturing tolerance of the gears, shaft, and assembly. The gears in a mower are not really precision, but are tough. As fars as the blades, if you are really worried, you could drill out the holes, and tap them for a larger, reversed thread. I wouldn't. I used to work in gear manufacturing, so I have some idea of this stuff. If it was a big bushhog, I might worry more about the blades coming loose, but on a finish mower, not so much. Just tighten them down, maybe loctite?
 
You might have to get creative on reversing the blades, or sharpen the backside of the blades?
 
I think wally would be a better name for it, LOL! Some comments, First, you'll have to change yer handle to fawty one, mount a mower in it, and back through yer neighbor's lawn, unmowing it as you go. Then maybe untill his garden and maybe ungrind some corn for yer chickens!
 
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