Okay, after rereading your description and checking mine, I am fairly certain that they are the same. I can't guarantee you this is right because mine has oil in it and is hard to tell where the passages are but I am fairly certain that a line from the block goes to the top hole of the canister, there, it passes through the filter and somewhere in the bottom of the canister there is a hole in that threaded tube. Then it comes out through the bottom and back into through a line into the block. I had pictures on here but unfortunately my account has expired. Sounds to me like it is plugged up.
