Help with steering problems

[JohnB]

Steve,
My inexperiance with hydraulic is showing.
There is a steering wheel that has 3 lines to the back of it,
A reservior, or something mounted below it, and
the cylinder on the back attached to the motor.
Where is the filler cap?
What kind of fluid does it use?
and I assume this is a self bleeding system,
I don't have to open it somewhere to force the
air out, it will come out of the filler cap.
Thanks in advance for your help,