find location of hydraulc oil filter?

I have a JCB backhoe, an older model and I would like to change my hydraulic oil filter. I am new to this tractor type of maintenance and do not know it's location but I have a gut feeling it is on the return line to the tank as it would be on an industrial piece of equipment. Some questions I have are, is it contained in a canister of some sort or is it a screw on type like an automotive filter? Anyway, could some kind soul point me in the right direction.
Regards