lift stays up ?

30-min leakdown is almost "braggin' rights"; altho there are reports of 8-hr leakdowns for rebuilt hydraulics.

Change yer oil, won't hurt 'nuttin'. Ford/New Holland recommends spec: M2C-134D hydro-tranny oil. Some claim that this is too thin for old leaky hydraulic systems. You can also use the 1939 recommended 90wt mineral gear oil (iff'n you can find it) Modern GL-1 is close approximation. do NOT use modern multi-wt GL-4 or GL-5 as they have "additives" that are perported to be "un-friendly" to yellow metal.

3-drains and 1-fill'em-up by the tranny shifter. Drain the square diffy plug first as it peees with better accuracy into yer 10-gal pan. Then drain the 3" tranny plug. Finally drain the 3" hydro-pump plug. Fill with 5-gal of hydro-tranny oil. DO NOT OVERFILL as the oil will splash out yer axle trumpet seals and greese yer brakes. Not good.

Correct hydro-tranny oil level is best set by pulling the 6'oclock (bottom) bolt of the 6" round dipstick plate behind yer right heel and lettin' any OVERFILL drain/dribble down the side of yer tranny housing. Now check yer dipstick level, that is the correct level, not the engraved mark. Understand?..... ...Dell

soundguy

The first rule when you buy a (new to you) N-Series tractor, is to change all the fluids. Now, if the seller tells me he just did that I would pull the dip stick and see what it looks like and if it looks good maybe let it go until the next service interval. If you have a tractor that has set for a few weeks, any water that has gotten into the system will be at the bottom of the sump (oil floats on water). So you can loosten each drain plug and carefully drain off what is at the bottom. I got almost a pint of water out of one of my tractors one time doing this.

kl