Full hydraulic machine

[kghills]

I'm not a hydraulics guy but would that even be possible? Wouldn't the o-rings in the pumps or motors or hoses fail in a hydro-static drive before they could get hot enough to melt stuff near them?

Keith.

[thebuggyman1]

Ever notice that big cooler(inside the engine compartment)....looks kind of like a radiator....That's an oil cooler! You bet the fluid and lines get hot, that is why you need a cooler.
Now if some townie were to bypass the cooler, I could see plastic being damaged right about the same time as the pump and motors seized.
I'm with Drew here, sounds like a used car salesman saying how much better his stuff was.

All you need to do is show up on a group ride when Matt brings one....He will let you give it a proper test drive until you are satisfied.

[kghills]

I guess I just can't see it myself. If its anything like the hydraulics in my Coot2 it's just hydraulic hoses running to everything. Even without the cooler I just can't see a hose transferring enough heat to melt something around it without it failing or the o-rings in the pump or motor going out first. I tried a Google image search on hydraulic heat failure but only got hoses being damaged by heat from an external source. In any case you would think if it had ever happened there would be something or someone complaining in the Mudd-Ox section of the forum, and there is not. My bet is it is an imaginary issue or non-issue as the case may be.

Keith.

[Buzz]

100% non issue. On both of my ox's I barely ever saw the needle on the hydraulic temp gauge even move. I know our air is a bit cooler up here but geez

[Noel Woods]

I work several hydraulic machines regularly here in Texas. None of which is an aatv, however all are construction equipment. I've had hoses blow out from age (many 20 years old with original hoses) but not from heat, as a matter of fact you can even touch the hoses without burning a limb. The hoses themselves act as a mechanism to shed heat.

[jeffery9076]

hydros

I always wanted a hydro machine. I have 2 walk behind mowers both need some hydro pumps rebuilt. Just always wondered if hydros would work better for plowing. And possibly 4 wheels instead of 6
PLOW UP FRONT DUMP BED IN BACK 10 MPH TOP SPEED
SO I HAVE 4 PUMPS AND 4 WHEEL MOTORS

[ARGOJIM]

I work several hydraulic machines regularly here in Texas. None of which is an aatv, however all are construction equipment. I've had hoses blow out from age (many 20 years old with original hoses) but not from heat, as a matter of fact you can even touch the hoses without burning a limb. The hoses themselves act as a mechanism to shed heat.

A malfunctioning relief valve will build heat very quickly and create tremendous heat. Rare cases but does happen, ie last year at the local tractor pulls we had an issue with a demo JD where something stuck and the entire rear half was so hot that the fuel in the above mounted plastic tank had to be drained while it smoked for fear of fire and the above mounted plastic fuel tank got heat distorted.

[Nubs]

Well the fact that John Deere lawn tractors and others have had there plastic fuel tanks mounted on top and within 2" of there hydrostatic transmissions for the last 30 yrs proves that heat is not going to be an issue under normal operating conditions

[Nubs]

I just remember over the yrs having pulled the fuel tank off my JD 400 and found dried grass packed between the tank and trans, looked like a fire waitin' to happen but never did.

[Nitewatch45]

How fast would you or anyone say you could go with a full hyd setup?

[Nitewatch45]

Is there any trans better than a t20?

[Noel Woods]

How fast would you or anyone say you could go with a full hyd setup?

I think 20 mph at best, based on current technology.

[ARGOJIM]

I just remember over the yrs having pulled the fuel tank off my JD 400 and found dried grass packed between the tank and trans, looked like a fire waitin' to happen but never did.

Just pointing out what can happen with hyd.'s, not common and this was a 75hp farm tractor.

[jerseybigfoot]

probably about 10 mph with a 25 hp kohler geared for 100 pct incline.

[riotwarrior]

Is there any trans better than a t20?

Clearly it's a matter of opinion and seeing I"ve not had a T20 I cannot say I don't like them, I just don't like how they operate.

The Hagen/Rooter is a marvel and had it taken off like the T20 I'm certain it would have been the defacto transmission for these machines..

The ability to counter rotate your trans, or go forward to reverse, without shifting is just amazing, it's as seamless as a full hydro unit and in fact I had originally thought that was exactly what it was.

JM2CW

Al