Start on filters and work from there. IF it has bio in it you could have a real problem! ---- it gets nasty in short period of time -----gotta clean everything out and start over. I wonder if the injection pump is stuck? ----If not---then you got it whipped! Did you try starting fluid in it? ---usually don't take much.
I was never around Komatsu so not much help! Lebs, (932), Cat (955) and of course ole Moose, IH (250-c) is about my limit.
