Just went through this on my eMax 22. The engine and radiator stuff are the same as he describes. The hydraulic check and filler is on the back side of the tractor. The big red cap with a hook on it is where you fill it, it screws out (it does not just pull out, don't ask me why I say this). Be careful screwing it back in so as to not get it cross threaded. There is a sight glass just above the PTO, you might need a flashlight to see it, it's below the guard, the fluid should be just at the red dot. I check it with all cylinders retracted on the FEL and the 3 pt. all the way down. It takes less than 5 gallons for the hydraulics. There are drain plugs on either side of the transmission/rear end. Drain both. I had to remove a hydraulic line (use two wrenches, it comes off easily) to get to the filter, it looks like an oil filter. The factory had it cranked on tight. You'll get some more hydro oil out of that line and the filter. The line shouldn't be under pressure, I think it is a return line of some sort. I didn't change the suction filter on mine, frankly, don't know where it even is, but I have a suspicion. Next oil change it gets changed or cleaned for sure. I fought with getting to the hydro filter and took the center cover off and the drive shaft loose, didn't really need too but the bonus was I could easily remove the grass and weeds wrapped on the drive shaft.
Front axle: there is a dip stick where he puts his finger in, on the left side of the axle, drain each side as he says or you aren't getting all the gear oil out (which stinks, by the way!). The new stuff was not stinky.
I use all Mahindra fluids, except for the engine, used a good brand of 5W-40 diesel oil for that. I checked all the fluids several times just after servicing everything. Check the radiator, mine was down about a quart or so after doing a seasons worth of mowing pastures.
