I have recently inherited a 1949 9N
A very cool old tractor.
However, back in 1949 they didn't publish Idiot Guides to these tractors.
A very basic question:
question: Where do I check the Hydraulic oil and where do I put the oil in ?
and how many quarts / gallons should go in there?

the reason I'm asking is there seems to be a leak on the right tire...an oil is leaking out. The only thing I can think is that it's hydraulic oil.

Advice ?