super md live hydraulic pump

Andrew Z · Oct 21, 2009

im working on my super md in which i plan on hooking up a loader to it. anyway today i hooked up a line from one of the outlets on the left side of the res. to a cylinder on a loader to see if it would lift it or not. it would lift it but would not hold it up at all! it would just fall right back down. im thinking that the relief valve is bad or the pump its self. the only thing that i see that is odd is the lever on the side of the res only has two postions not '3' like a belly pump. it seems to only have up and down no netural positon? i plan on routing the loader though a spool valve but shouldnt it work this way as well? any thoughts as if the pump or valve is bad?

thanks for the help

Andrew

Janicholson · Oct 21, 2009

As far as I know every liftall belly pump has 4 positions. Lift (all the way out)
Hold (on rod stop at the bracket)
Front lower (1/2 way to full in)
All lower (full in)
If it is not that way it is either not original, or the control is positioned wrong, or it is messed up in the internal linkage. JimN

Andrew Z · Oct 21, 2009

Jim, this is on a stage 2 with the live setup not a belly pump set up. ( the res is under the fuel tank)

Andrew

Janicholson · Oct 21, 2009

I failed to read the subject.
I think (but do not know) that there are two rods, one a on off (what you have probably) and a "christmas Tree" valve, or open center spool valve for cylinder control. My best guess. JimN

M Diesel · Oct 22, 2009

Ifn you run a loader with a spool valve, it won't matter as the pump will need to be on full time with the new spool valve handling all directional work. It will provide the up/down/holding.

Be sure and get one with a float spool. A three spool will run the boom and tilt and a remote (or 3 point). I have a 3 point as well, so I set up the tilt to be driven by the remote hoses. That way I can use the remote for bucket or implement, and it is easily switched. Four spools are expensive and harder to find, and using dual valves means extra plumbing and one has to be a power beyond unit. (Cross makes very nice valves btw)

Andrew Z · Oct 22, 2009

thanks for the md. i tested the pump today with a gauge and it peged about 1100psi and i let off. so i think the pump is good. at least thats a plus. going with the spool set up like you say

thanks again

andrew

M Diesel · Oct 22, 2009

Then you are good to go!

It should make ~1200 psi at 12 gpm if I remember right. They are not known for lasting long if used heavily at high pressures. It takes out the cam gears. (only on the gas models) A rule of thumb to remember is the belly pump rate 8 at 800, and the distributor pump is 12 at 1200. Not exact, but close enough.

super md live hydraulic pump

Andrew Z

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Janicholson

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Andrew Z

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Janicholson

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M Diesel

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Andrew Z

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M Diesel

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