Re: Ezee On loader on MF 135 tractor
Thanks for the feedback Dave
the 3 pt system has its fluid from the transmission via the draft control lever or pressure control depending on the type of implement.
This is all quite new to me but my loader is equipped with a pair of double acting cylinders. To switch from 3 pt to loader I set the draft control all the way to the back and inner quadrant control lever to constant pumping; this allows the May Hill diverter to act as my "auxiliary control valve" to enable the loaders Nimco control valve get hydraulic fluid to the loader. There is a Nimco valve on the loader and I have struck out talking to Nimco customer service about a manual for the valve. It is a single joy stick and I hope to figure out its' functions when I get everything operating. This was a used 2001 item on the loader I bought and I have bought a o ring rebuild kit that is due here Monday; has some significant leaking. I'm going to take my time on this and plan on calling Nimco technical help tomorrow to get an explanation on hydraulic return to transmission from the 2S-40272 valve mounted on the loader.
The most obvious thing on the diverter valve is that three ports are supply only depending on the location of the handle ; Nimco needs to tell me which valve port is for return.
Can you post some pictures of your setup as it would help us understand it better.
The return port to the transmission from your Loader valve should be easy to identify.
This simple sketch is my way to try and explain the valve functions.
Hydraulic oil under pressure is fed into the valve block, often on the side of the block but not always.
If you have not moved the joystick, oil flows straight through the valve block and returns to the transmission.
If you want to lift the loader arms, you block the flow to the transmission and instead send it to the lift port on the two cylinders on the loader arms.
As oil flows into the lift port on these two cylinders, oil must leave the cylinder out the other port, one on each cylinder and return to the transmission. If this oil did ot have a return path, the cylinder push rod could not move. This return path takes place inside the valve block and uses the common return port and hose.
If you want to curl the bucket, you send oil under pressure to the curl port on the bucket cylinder and oil from the other port on the bucket cylinders are also diverted to the common return line and back to the transmission.
If you put the joystick into full loader arm lift position, for as long as all oil flow available is going to lift the arms, no oil is available to power the bucket cylinders.
Sometimes hydraulic valves including a FEL vaalve incorporate a "power beyond feature." For the moment lets no make matters more complicated for you.
Dave m7040