Can anyone lead me to some good hydraulic piston/ram diagrams or schematics?
As far as schematics go, they're all pretty similar. A ram is single acting, and has the working fluid act on the entire cross sectional area of the rod. Conversely, a cylinder may be single or double acting.
Can you be more specific about what you're after? The Parker website (http://www.parker.com) has a good interactive catalogue with schematics.
Separate names with a comma.