I worked the tractor hard yesterday in the heat. Took a break from the heat and although turned off tractor was sitting in direct sun. Came out a hour later and it wouldn't crank. Washed the dirt and dust off the tractor thinking it might need to cool down, didn't touch engine)and no luck. Crossed the terminals on starter and it fired up. Engine fluids are good. Today after sitting inside all night it still wouldn't crank. Checked hydraulic level in the back and its not on stick. I'll pick up hydraulic oil tomorrow and let it sit for today. Is there a sensor on level that wouldn't let it crank? Yes, I had leakage coming from the quick release manifold on the FEL. That has now been corrected. I didn't think I lost thaaat much oil. Without looking at manual what is capacity of hydraulic in the rear? I'm almost ready for 200 hour service(had complete service at 160)I'm at 198 now. Thanks for suggestions.