How to change the fluid (6.8 gal low viscosity on the E-Hydro)and filter are in your manual, as well as the part number for the suction filter which is $75. Pretty much just like changing the oil in your truck. I ran my tractor up on some 2x6's to get clearance for a 5 gal bucket under the drain plug. Remember it's 6.8 gal so have two buckets ready. Right next to drain plug is the suction filter, remove the cap (more fluid will come out, have bucket under it) and pull out the filter but not all at once because more fluid comes out when you start removing it. The suction filter cap is large and if you do not have a filter tool big enough to get it off, use an old belt. I reached in the filter hole and cleaned out excess filings from the manufacturing process. While that was draining I removed the in-line filter on the left side of the tractor, it's right in front of the brake pedals. You will need a couple big wrenches. When you get it off, take it apart and clean it, I just used some gas to clean it, let it dry and put everything back together. The in-line filter has o-rings on each end, be careful not to hurt or loose them. Wrap some Teflon around the drain plug before you put it back in, three wraps should be fine. Also, on the in-line filter and suction filter cap, coat the o-rings with some hydro fluid before assembling. When filling the fluid it's easier if you have a long funnel. If your roll bar is folded down put two long funnels together, that's what I did. Secure the funnels or have someone hold them when filling. When starting the tractor back up you will need to move the joy stick in all directions to purge the air out of the system. Hope this helps.
sam