I have a T&T unit from a early 80s OMC that I'm getting ready to install. I'm going through the motor replacing brushes etc. I would like to change the hydraulic fluid. Is there any special way to drain it? Are there any filters or screens that I should check or clean? How do you check the fluid level to make sure it's correct? Do I have to use T&T fluid or can I use Mil Spec hydraulic fluid (5606)? For those of you following my other posts, this is the T&T going on my 72 100HP Johnny so I don't have a manual that covers this T&T. Thats why I'm asking all of the questions.<br />Thanks In advance<br /><br />Russ in Texas