new holland tb110

I have a 2005 TB110, It came back from a complete service last fall. It has just over 400 hrs. I thought I heard a noise in the steering and was going to check the power steering fluid. I couldn't find a dip stick to check it and the owner's manual doesn't tell you how to do it either.

I guess this is "after the fact" but I would just like to know what engine is in my tractor. When I bought the tractor, I was told by a dealer that it was the same engine that was in the Ford / New Holland 7610. Today, I was told by another dealer that it is the same engine that was in the...