single stage pump to 2 stage pump

tschmidt · Nov 21, 2016

Hi, I have a Massey Ferguson MF-50 with a freeman 4000 FEL, it has a front mount pump that I believe is going bad. My question is, what is better to use a single stage pump or a 2 stage? according to my manual it requires a pump that can put out 18gpm. Any help would be great.
Thanks Tim

mrmikey · Nov 21, 2016

You don't want a two stage pump in that kind of an application, the speed would be hard to control. It would move fast until it encountered a load and then slow down. An 18 GPM pump is a pretty good size pump. My two cents worth...........Mike

Xfaxman · Nov 21, 2016

Does the pump only run the loader?

It must have some large diameter cylinders.

LD1 · Nov 21, 2016

Ditto what mrmikey said. You dont want a 2-stage in that application

tschmidt · Nov 21, 2016

Yes it only runs the loader. I don't think the cylinders are any bigger than normal. I'm not positive what size the pump is, I'm only going by the manual online for it that says 18gpm pump. I'm going to try to find numbers or something on the pump.

tschmidt · Nov 21, 2016

I will try to put pics on. There is nothing on the pump

tschmidt · Nov 21, 2016

Xfaxman · Nov 21, 2016

I don't understand why you would replace the pump without knowing that it is bad.

What are the symptoms?

How much pressure is it putting out?

Can you hear the relief valve open?

tschmidt · Nov 21, 2016

the reason I think it's going bad is I broke the shaft from the pump to the motor. I found it was welded once before. I put a new shaft in and started it and the pump was smoking. Found I was low on hyd. oil, so I filled it up and now it will raise but super slow and only a little ways. It won't hold and also I have zero down pressure now. I new to this type of equipment, I don't know how to check pressure or relief valve. any help would be greatly appreciated. I just figured it would be easier to just replace the pump, the fel worked great before the shaft broke.