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How Do You Run Your Hydro?


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#1 HowardsMF155 OFFLINE  

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Posted March 03, 2012 - 09:32 PM

Since my Massey Hydro didn't come with an instruction manual, I've been noodling out some things myself about operation. It appears that the hydro runs best when engine speed is pretty high. Do people generally run hydro engines at full throttle? Does this provide the best control of ground speed when navigating wavy terrain?

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#2 IHCubGuy OFFLINE  

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Posted March 03, 2012 - 10:22 PM

Anything that is hydrostatic is designed for the engine to be run at full throttle when in use. I won't say I always follow this but that is how they are designed to be run as it at full RPM that the pump and motor of a hydro system have the appropriate operating pressure.
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#3 DH1 ONLINE  

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Posted March 03, 2012 - 10:34 PM

I always ruining 1/2 to full, depending on what I'm doing with it.
Just driving around not in a hurry 1/2.
Grading the driveway or pulling a small trailer 3/4.
Cutting grass, plowing snow or in a hurry, full.
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#4 IamSherwood OFFLINE  

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Posted March 04, 2012 - 01:35 AM

I run mine the same as Doug does. As said earlier, run at full throttle, when working hard. Any manuals I've seen that
discuss it say that.
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#5 mjodrey OFFLINE  

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Posted March 04, 2012 - 05:08 AM

I also run mine the same as Doug,and Will.
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#6 Michiganmobileman OFFLINE  

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Posted March 04, 2012 - 07:02 AM

I also run mine the same as Doug,and Will.

And I will jump in here as # 4 to do the same as the guys above. Will drop it to idle if setting in place for a while, other than that no less than half throttle when moving.
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#7 Toolpartzman OFFLINE  

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Posted March 04, 2012 - 07:29 AM

Howard, I agree with full throttle use and I think it helps the engine cool as well as the hydraulics perform. The only "hydro" I have running currently is a wheel motor -driven Commercial Gravely Z-turn walk behind with 52" and the Vanguard runs much better at high Rs.

It really brings in the big blades smoothly and effortlessly. At that speed I rarely need the pump to be over 10% of full stroke.
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#8 ckjakline OFFLINE  

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Posted March 04, 2012 - 09:44 AM

Make me #5.I only use full throttle when i'm working it real hard.
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#9 OldBuzzard ONLINE  

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Posted March 04, 2012 - 09:50 AM

Like the folks above said. If you are working the tractor, run the engine WFO. That's especially true if you are using a PTO driven implement. That even applies to the gear driven tractors as well.

Things like mowers are designed to be run at their "PTO rated" speed, which is almost always at full throttle. Running at less than fill throttle make them, especially mowers, less efficient.

I run the engine at a high idle when I'm warming up the hydro in the winter, and when I'm off the tractor loading a cart or something like that. Around 1/2 throttle if I'm just moving from place to place, and WFO for everything else.

I used to help a good friend of mine mow 3 softball fields that he owned. He had a JD 750 (built by Yanmar), He always wondered why the grass looked better when I mowed it that when he did. I kept telling him that it was because I ran at full throttle which let the mower cut better, and geared down to get the a speed that wouldn't 'lug' the engine. He on the other hand, always ran at a higher gear and less RPM, and the mower was 'beating the grass into submission" instead of cutting it cleanly.. He finally saw the light when he had to have the engine overhauled at around 1500 hrs use because the cylinders were ovaled out from lugging it all the time.
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#10 ducky OFFLINE  

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Posted March 04, 2012 - 09:51 AM

Yep, Full throttle when doing hard work.
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#11 HowardsMF155 OFFLINE  

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Posted March 04, 2012 - 10:07 AM

Thanks to all who replied. I've always used Gravely walk-behinds and you do some speed control by using the throttle. OldBuzzard, you make some very good points. I've noticed with my Gravely that using "high" PTO speed with "Low" axle range lets me rev up the engine without going too fast and the grass certainly looks better cut. It also seems odd when I just want to putt around the yard a bit to have the engine revved way up, but with the hydro it does seem to make sense. Guess I'll have to remember to use the geared one to putt around on :rolling: :rolling: :rolling: :rolling:

#12 Texas Deere and Horse OFFLINE  

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Posted March 04, 2012 - 10:22 AM

This is a very good thread, and I am going to pin it, I'm with the other guys, I always run at full throttle unless one of my girls is Joy riding in the yard.
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#13 IamSherwood OFFLINE  

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Posted March 04, 2012 - 10:37 AM

Another reason, is so the oil dipper on the connecting rod throws the oil as far as possible, which it won't
do at low RPM.
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#14 caseguy OFFLINE  

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Posted March 04, 2012 - 10:49 AM

Governed engines, especially the ones without pressurized oil systems, are designed to be run at full throttle. Not only so the oil dippers work properly, but so that the air flow through the engine shrouds is at it's maximum. It's hard to believe, but the engine will run much cooler at full throttle than at half.
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#15 daytime dave ONLINE  

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Posted March 04, 2012 - 11:02 AM

I run mine at full throttle almost all the time. I always run full when doing any type of work with the tractor. I rarely let it idle if I am off of the tractor either.

The only time I don't run full out is when I am getting into a tight parking spot in the barn due to tractor overpopulation.
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