1000 rpm pump run on 540 rpm

[desert trader]

Can a 1000 rpm pto pump that puts out 23 gpm 2200 psi be run on a 540 rpm tractor and if so what would it do to the gpm and the pressure out put.

 

[RickB]

Output pressure is determined by relief valve setting and applied load. Pressure will not be affected by operating a sound pump at approximately half speed. Flow from fixed displacement pumps is speed dependent. GPM will be approximately 12.25.

 

[kennyd]

Yup, as Rick wrote...pressure is constant, GPM will be affected.

 

[desert trader]

Hey thanks alot for the info you just might have saved me a lot of money.
It's great to have a place to get must needed info,thanks again.

 

[SPYDERLK]

As said above... You will however need to keep the rpms up for good pump performance. 1/2 speed is barely a problem, but idling down on the already reduced pump speed will have it running at 1/3 or 1/4 speed. As the oil thins with warming, internal pump leakage [proportional to output pressure, but independent of rpm - and increasing as the pump wears] will start to overtake output. For example ... In a fully warmed system running at full pressure at 1/4 pump nominal speed it is likely you will only get 1/8 of nominal full rated rpm flow. Maybe less. At 1/2 pump speed youre pretty good - instead of the 50% capacity you will get around 40% at pressure. Not too bad.
Also, some types of pump are better than others for reduced speed service because they have less internal leakage. I have assumed it is a gear pump.
larry

 

[desert trader]

The pump is a prince HC-PTO-3A.

 

[J_J]

Is this a pump you have, or thinking about getting. That pump requires about 34 HP to run it at a 1000 rpm.

 

[desert trader]

I should be okay I have MF 165,I'll just have to get a pto shaft adapter.

 

[SPYDERLK]

Is this a pump you have, or thinking about getting. That pump requires about 34 HP to run it at a 1000 rpm.

Hes running it at 540/600. Less than 20HP.
larry