2 way hydraulics for Super M??

Seriously, my dad put it on there many moos (moons?) ago when he used to bring in the cows for milking on his way home from the field. I知 not sure what it is from, most likely something pre-WWII I知 guessing.

Okay, in the olden days, it was common for people to upgrade their early Supers with live pumps, and use the old belly pump as the reservoir.

The intake for the live pump would draw its oil from the bottom of the belly pump reservoir, pump it through the valves and lines, then dump it back into the fill port on top of the belly pump.

I believe you have to drill and tap the bottom of the belly pump reservoir for the intake.

Your other option is to completely eliminate the belly pump altogether and use a separate tank. Northern, among others, sells all-steel hydraulic reservoirs in many shapes and sizes.

Remember, the belly pump reservoir can only hold a few quarts of oil, and it's going to get REALLY hot with much loader use. 3-5 gallons in a separate reservoir will stay much cooler, AND you won't run the pump dry and shear the keyway on the timing gear.

I would not plumb in an extra relief valve. It just makes for a sloppy installation plus it is an added expense. MOreover it has to be installed between the pump and spool valve and require high pressure hoses and fittings.

If not, here is one that will work from Northern Tool. Prince adjustable relief valve for $30.

I would set it to the minimum adjustment of 1000 psi and call it good.

FWIW The live hydraulic pumps on M thru 450 were around 12 gallon per minute at 1200 psi max if you need the specs.

For return from the OUTLET of your spool valve, tee into the fill hole for your current reservoir.