I purchased a D1650 FD Mitsubishi Tractor with Front-end Loader. I didn't get any kind of manual so its been having to pick up information here and there as I can find it. I think I'm low on hydraulic fluid, but of course it doesn't have a dip stick. I measured it and I'm at 4&3/4" from the bottom with all the lifts down. Any help would be greatly appreciated....