Purchased a used 2011 Kubota BX25, brought it to my Aunt's house unloaded it, moved some dirt for her, went to load back on the trailer, shut it off to close a gate, tractor would not restart. Replaced battery, replaced fuel solenoid, drained fuel seller put in, put in new fuel, replaced fuel filters, bled injector, had plenty of fuel coming through, cracked the lines at the injectors, did not get high pressure but got fuel coming out while cranking engine, still will not fire, plenty of air, took off hose at air filter housing cranked engine and it collapsed the hose. Do not know exactly where all safety switches are, tested the black one under the seat and it tested good for continuity, the gray one did not, do not know exactly what that one is for. There is a front loader and a backhoe on the tractor. Tractor has 1200 hrs on it. Any help would be greatly appreciated. Looked at all the YouTube videos available nothing matches my symptoms.