Tractors rated hydraulic flows

[Sawyer Rob]

Some mfg's say "combined flow" and if you are new to tractors, that can be confusing...

Regardless, you will NOT get pump rated flow to the remotes, there will always be some loss'.

SR

 

[kennyd]

It would be safe to assume the "rated" flow rates are at PTO RPM.

 

[SilentJ]

You’re spending a lot of time think8ng about what flow your tractor will MAKE

Have you asked the question about how much torque you NEED the motor to make ? Select the motor based on this, and the available pressures, first

Just looking at RPM is a good way to size a motor wrong and be dissatisfied with the performance.

 

[Smscott]

My tractor's (Kubota L2501) hydraulic system puts out 5 gpm at 2200 psi. I have been researching and found a hydraulic motor for a project I am building. The performance data for the motor says that 5 pgm flow will give me the 60 rpm that I am wanting. My question is, at what engine rpm are tractor hydraulics rated. In other words, to get the 5gpm flow what rpm would the engine be rinning. I want the motor to run at 60 rpm when the tractor engine is at or just above idle not at or near max rpm. How do I figure this into the selection of the motor.
The motor that I found is 15.4 cu.in. motor. How do I know if this motor is sized right or if I need a smaller or bigger flow motor to get the rpm I want at or near idle.

I have a 2005 tc25 S with a bush hog 2246qt loader on it that can’t hardly pick up anything. Previous owner had put a new pump on the tractor and a new cylinder on the loader. I didn’t test it with any weight when I bought it. Is the 2246 QT loader too big or requires a larger gpm flow.? What should the gpm on the tractor should be? Is there a high flow pump available? Any help would be greatly appreciated.
Anyone in Savannah Georgia area willing to take a look at it?

 

[Sawyer Rob]

I have a 2005 tc25 S with a bush hog 2246qt loader on it that can’t hardly pick up anything. Previous owner had put a new pump on the tractor and a new cylinder on the loader. I didn’t test it with any weight when I bought it. Is the 2246 QT loader too big or requires a larger gpm flow.? What should the gpm on the tractor should be? Is there a high flow pump available? Any help would be greatly appreciated.
Anyone in Savannah Georgia area willing to take a look at it?

Larger GPM will NOT increase the power to lift something, you need higher pressure to get more power.

Higher GPM will make it move faster though.

SR

 

[Xfaxman]

Any help would be greatly appreciated.

I bought a pressure gauge, hydraulic tee and connectors so I could check the aux pressure on my V417 Versahandler.

For your tractor a 3000 pound gauge would work best on the input to the loader from the pump. Connect it so the flow is through the tee to the loader.

View from the seat:

 

[Sportsman762]

The motor is for a capstan winch that I have been researching. Someone on another forum gave me this link which will definitely help for motor selection

Assuming that the pumps rated flow is at PTO speed which is 2000RPM, this would suggest that you have 750 rpm*5.15 gpm/2000rpm= 1.93 gpm. This is hardly anything. I think you will need to plan on running it at pto speed.
That sounds like an interesting idea. What are you using the capstan for?
I have used catheads (horizontal capstans) quite a bit when doing water well servicing. They provide amazing control. It was my experience that the hydraulic units slowed down considerably with a load. The higher the load the more they slowed. This was frustrating when trying to ease into something that the load would get heavier on such as lifting pipe off the ground. The mechanical catheads would stay the same speed. Smeal / Hunke for the 5T pump hoists used 101-1005 (11.3 cu in) motors with a 14 tooth sprocket on the motor and 36 on the cathead for the indirect drive and a 104-1143 (24 cu in) on the direct drive catheads. I am not sure what the flow rate is on the hoists but they have a flow divider to control speed.

Options

www.hunkemfg.com

 

[Rustyiron]

For a simple capstan, I'd be thinking about a mechanical pto driven setup especially with the exceptional control they offer and no need for reversing.
Any right angle gearbox from an old mower, post hole digger or even a small car axle could be used. Now you'd be working it down near an idle.

 

[Sportsman762]

For a simple capstan, I'd be thinking about a mechanical pto driven setup especially with the exceptional control they offer and no need for reversing.
Any right angle gearbox from an old mower, post hole digger or even a small car axle could be used. Now you'd be working it down near an idle.

I used a pump hoist that had a ford AA axle (5.17:1) that had been modified with catheads on both ends. At an idle with a 21 hp 540 PTO running it it was perfect for work. With heavy loads it did not slow down much. If it did a mid speed idle kept it at a manageable speed.