Hydraulic problem

Slate · Feb 14, 2021

I have built a ride on snow blower, the blower part is mechanical and the propelled part is hydraulic. It has 6 gallon a min pump and 5 cu in/rev motor. There is a flow control valve in the system. All parts are new. It will move on the flat but looses power on incline to stall out. The reason for high cu in/rev motor is to drive very slow. I am lost could anyone help me.

tdmidget · Feb 14, 2021

What pressure is the pump rated at and what is the relief valve set at?

Erich · Feb 14, 2021

Engine power and pump displacement/rev? Are they running at the same rpm or is there gearing in between?

tdmidget · Feb 14, 2021

He says 6 gallons per minute which is 1386 cubic inches per minute. We also need to know how fast the pump is supposed to turn and how fast is it turning? If everything here is new then the relief valve may not be set properly. First thing I would check if speeds are correct.

john.k · Feb 14, 2021

You need to fit some pressure test outlets into the circuit,then you can see where the problem is......As mentioned ,it seems a relief valve is limiting circuit pressure to a low level .

DDoug · Feb 15, 2021

Slate said:
I have built a ride on snow blower, the blower part is mechanical and the propelled part is hydraulic. It has 6 gallon a min pump and 5 cu in/rev motor. There is a flow control valve in the system. All parts are new. It will move on the flat but looses power on incline to stall out. The reason for high cu in/rev motor is to drive very slow. I am lost could anyone help me.

You built it, and how did you pick the hydraulic components ?
Show your math please.

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