hydraulic-hydrostatic

how does a hydraulic drive transmission and hydrostatic differ?

Hydraulic drive uses a fixed-displacement pump, and flow control valves are used to divert the fluid to the hydraulic motor. Speed and direction are determined by the position of the flow control valves.

A hydrostatic drive uses a variable displacement pump, where the amount of fluid pumped is controlled by a couple of different methods, depending on pump type.

Hydrostatic are typically much more complex.

Hydraulic drive, such as the Case LGT's used is PATHETIC.

At least, that's what a friend said after his 446 "overran" it's hydraulic drive, and dumped him in a lake!

WHY they didn't use a true "hydro" is beyond me!

Yea, if I drove a lawn mower into a lake I'd blame it on the tractor too. I've been using a 446 for a few years on side hills, banks around ponds, etc. I've never had a problem with the tractor at all. I'd also blame the truck if I couldn't shift gears without grinding. Must be that power steering doing that. :wink: Mike

Yea, if I drove a lawn mower into a lake I'd blame it on the tractor too. I've been using a 446 for a few years on side hills, banks around ponds, etc. I've never had a problem with the tractor at all. I'd also blame the truck if I couldn't shift gears without grinding. Must be that power steering doing that

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Good one...

LMAO


:lol:

Bob,
Here's what's beyond you.

Any real knowledge of Case Garden Tractors. You are maligning a first-rate machine based on someone else's experience and he obviously knows very little about the machine he owned.

The Hy-drive system used by Case and then by Ingersoll after Case sold the OPE division, was patented by the Johnson Bros in the early 60's when they started making Colt tractors.

The beauty of driving a tractor using a hydraulic pump is as follows:

1. You only need ONE inexpensive pump

2. With a fixed displacement pump, you can power hydraulic cylinders and hydraulic motors at the same time. You can't do that with a standard variable displacement pump.

3. As such, the Colt/Case/Ingersoll tractors were able to offer a huge list of attachments that were powered using the optional rear mounted hydraulic PTO. What other brand has ever offered this sort of attachment line-up?

Snowblower, belly mounted mowing deck, three point hitch, rear mounted finishing mower, Bush Hog mower, double-acting log splitter, lawn vacuum/bagger, trencher, forklift, front-end loaders, post-hole digger, sickle-bar mower, rototiller to name just a few.

And that doesn't include all the passive ground-engaging equipment that all the other GT's can make use of such as discs, harrows, plows, snow/dirt push blades, rollers, seeders, sweepers and so on.

Had your friend actually taken the time to read and understand the Operator's Manual, then he would have known how to control the tractor on grades. But maybe, and I do say maybe, he's one of those guys who just has to push his luck by putting his tractor and himself into situations where smarter people wouldn't go.

Yes....Case did have the problem you described and had your friend told the local dealer about steep grades on his property, they would have installed the optional "Holding Valve Kit" on his tractor and that would have saved him from getting an unplanned bath. Ingersoll resolved this issue in 1984 by redesigning the travel/lift valve to include the holding valve feature.

When a tractor with a hydrostat drive has a serious failure in the hydro, then the repair cost often exceeds the current market value of the used tractor, thus making the tractor nothing more than a piece of junk. When the pump wears out on a Colt/Case/Ingersoll, you just buy a new hydraulic pump for less than $300.00 and continue using the tractor for the next 15 years.

That's why there are people out there who are still cutting grass and blowing snow with Case tractors that were built in the sixties. How many people do you know that are still using a garden tractor that was made forty-years ago?

If hydraulic drive was a bad idea, why is it still being used today in all the new Ingersoll's?

The link below will take you to Ingersoll's site. The appearance of the tractors has changed over the years but not by much. The quality of the parts used to build the tractors is just as good as or even better than what Case used forty-years ago. What other brand can you say that about? Ingersoll still "builds them like they used to".
Untitled URL Link

Hey tommy boy I know of more people using cub cadet tractors that are 40 years old then any ingersolls, wake up and smell the coffee tommy-boy!!

cub buddy,

As I understand it, Cub Cadets began in 1960. That would make them older than the earliest Colt by about one year. But then again, IH Cub Cadets have been long gone from the manufacturing scene. No self-respecting Cub Cadet afficionado would include the MTD-made CC's with the original ones.

The name changed from Colt to Case to Ingersoll but the quality remained and it is still there today. Unfortunately, you cannot say that about the current crop of tractors bearing the highly respected Cub Cadet name. And that sir, was my point.

And since I don't drink coffee, it's rather hard for me to follow your suggestion. LOL