[borcheb]

I have a 1996 Express 40 and I suspect my hydraulic steering fluid may be low. There are no leaks in the system:
Question: How do you check the fluid level for the hydraulic steering? I have been all through the owners manual and cannot find any reference for checking or maintenance. I do see the oil fill port located at the helm. However, no dip stick is present to determine if there is an appropriate amount of fluid in the system, nor do I see any way to check levels when lifting the helm station and viewing from behind. Should I see fluid in the cylinder when I open the fill cap? Also, what is the recommended hydraulic fluid? Thanks for the help