Hydrostatic Transmissions explained

[woodlandfarms]

So this was posted to me for my Kubota POS. Interesting read...

Understanding and Troubleshooting Hydrostatic Systems

 

[k0ua]

For the visual learners out there:

Keep in mind a conventional tractor does not have two hydraulic motors like this fork truck.
It only has one hydraulic motor that drives a conventional 2 or 3 speed gear box (range selector) and the usual differential components. However for you power trac guys, I believe there is a hydraulic motor on each wheel.

So from the hydraulic motor on backward to the final drives, the hydrostatic equipped tractor is pretty much the same as a conventional gear tractor.

 

[MossRoad]

Thanks. Good reading.

I started operating hydrostatic machines when I was 18. Don't laugh, it was a Wheel Horse tractor converted into a hydraulically articulated airplane mover with an oversized sun strand pump and no front axle. It was cantilevered with a rear steel fork for picking up nose wheels with a hydraulic cylinder operated lift. You sat backwards on the hood with the steering wheel between your knees. Anywho, I had to work on it once in a while.

Then around 1989 we bought that late 70's IH2500b tractor loader. It was HST. So I purchased all the manuals for that and got a pretty good understanding of how it worked.

Now we have the PT425. It's a beautifully simple machine. Just beautifully simple. And that's what I like about it. Almost as simple as my '70 Nova with the 230 L6 and three on the tree! :thumbsup:

 

[Peter 315]

Nice , Makes sense that my owner manual says change the HST filter every 200 hours If the HYD oil stays in the loop