I am sure I'll get some "what a rookie" groans from this posting but oh well, I'd rather take that, than screw something up so here goes. I bought a 3215 a while ago and I've sprung a leak. The leak is coming from a flexible hose (upper hose) that attaches the hydraulic filter line (located under the left floorboard as you sit on the tractor), to a bigger line running to the back of the tractor. I've ordered the replacement piece however, in the process I've managed to give my hands and armpits a nice thick coating of oil/fluid. Now, in my mind...the fluid coming out of a hydraulic line would be hydraulic fluid however, when I unscrewed the dipstick that is centerline on the top of the transmission (in between your feet as you sit on the tractor), the fluid level isn't even on the stick. The dipstick says "OIL" on it. My bigger question is, do I refill the lost fluid through the "OIL" opening in the transmission and, what kind of fluid is required (80W-90, or hydraulic)? Any help is appreciated!