I'm slowing getting around to draining/replacing oils in our newly acquired Series I 1958 diesel.The manual says that the power steering takes SAE 20 oil, but several folks down here told me to use standard tractor fluid. After refilling the tank to about 1/4" above the gear, I ran the tractor and cycled the steering several times to remove air in the system. Two problems/questions: 1. The oil immediately turned milky and also overflowed out the vent after a few minutes running. The vent is about 3" high. 2. The steering wheel "sticks" at the first attempt to steer and then the steering works fine in both directions. Should I have used regular engine motor oil (20 or 30 weight) or should I use some sort of hydraulic oil? Is the sticking at first effort normal or is something else going on here? Thanks for any advice or ideas.
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