1965 Farmall 504 utility

Sonny580 · Feb 4, 2012

Dont mean to sound like a broken record BUT you really do need to get a service manual for the tractor! I have 404, 574, 2504, and 504, plus others!

Hyd. is also the trans fluid! they share the same pot, same fluid and same filter!

On 504 and 2504 series with draft and position control and power steering, two pumps are used. Filter/screens/etc. are located in the belly of the tractor right below the foot plates!
If fluid is milky you either have water or other contaminates in there OR you have a blown O-ring (allowing air to enter pumps)on the suction side of one of the pumps,--which would require pump removal to replace O-ring, and not being a time consuming job it is a very messy one! thanks; sonny 580

retiredrich · Feb 5, 2012

The fluid is not milky but I will get a manual for the tractor. Thanks for the input.

retiredrich · Feb 5, 2012

Today I left the rear blade on the ground and the loader worked okay. Maybe I need to put the rear blade in that 'neutral' position you mentioned (not sure where that is) once the blade is raised? Yesterday I was leaving the lever in the 'raised' position when I was trying to use the loader.

J_J · Feb 5, 2012

If you put a hyd gage in the circuit you will be able to tell every time if the lever is in neutral position, plus use the gage to monitor and trouble shoot the hyd system.

retiredrich · Feb 5, 2012

Thanks JJ. I will do that when the weather is warmer out. Until then, I can get by.

SSdoxie · Feb 5, 2012

Hydraulic fluid? Use IH hy-tran or its equialent found at TSC or other places.
It sounds like the 3 pt control is going too high, the lever may be out of adjustment so when it is raised fully the lever is still trying to raise more causing system to go over relief. Try raising the 3 pt still it stops then move the lever fraction of an inch to down and see if that solves the problem.