Silver Eagle is not a homeowner based mower. I work for a Dixie Chopper dealer and we have hundreds of them in the marketplace. They use 15W 40 Lucas oil in the engine and the hydros as well. If changing the hydro oil you will need 2 68140 hydro filters and about 1 1/2 gallons of the 15w 40 lucas for the hydros and 2.4 Quarts for the engine as well as a 070185D Generac oil filter for the engine. You will have to drain the hydro tank by taking the filters off. That can be messy. You can take a gallon oil bottle and cut one side out and screw one filter part way off and drain the oil until bottle almost full. Tighten the filter back up and empty the bottle. Then do it again until the tank is empty. Fill the tank to 1/2 inch under the baffle in the tank. You will them need to purge the system of air. To do this you need to open the release valve on the pumps. They made two different pump on the SE. One was a hydro gear and to open the valve look for a bolt head with a hole through the side. It takes a 5/8 wrench. The other is a white. If it is a White it will have a jam nut on the valve that takes a 17 mm wrench to loosen. In the middle of the nut is a 8mm bolt head. You will need an 8 mm wrench to open the valve. Open the valve 1 and 1/2 turns. Raise the mower and get the rear wheels off the ground start the engine and swipe the levers 8 to 10 times. Lock the relief valves and you should be good to go.
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