does hydraulic gpm matter?

[Jay87T]

Hi guys my tractor hydraulic pump puts out about 4gpm. I picked up a new hydraulic controller for the loader, its rated 10gpm max. is there such a thing of the valve being to big?

 

[David G]

Too big of a valve will make it fully actuate in the first part of the travel. That means you will move the valve 1/4 of the way and it does nothing the other 3/4.

It will be fine.

 

[LAA]

If you have trouble getting used to the short stroke of the bigger valve or if your loader lurches in operation you can bushing down the discharge port to slow the fluid and lengthen the valve stroke.

 

[Jay87T]

nice to know, just go with a smaller hose and adapter from the tank port?

 

[LAA]

You want full pump output feeding your loader valve and then you can distribute from the valve however you might need to, you probably won't need to change anything but you can if you need to. I have a portable hydraulic power unit with a 8 gpm @ 2100 psi pump powered by a 11 H.P engine, I operate different implements with it including an auger wagon feed cart, hydraulic post hole digger, hydraulic winch, T-post pusher and a tire bead breaker, each implement requires different GPM or pressure and I have them all regulated by the supply hose size on each tool.

 

[buickanddeere]

Perfectly fine with the 4gpm pump And the 10gpm valve. A good match actually.

 

[JDemaris]

"GPM" has little meaning. Pumps are rated a cubic-inch-per-revolution, or gallons per minute at a given RPM.

If you pump makes a max of 4 GPM, any valve with a higher flow rate is fine. If small, it will restrict max flow.