I'm looking at purchasing a Komatsu PC150. When I tried it out, it will not lift itself with only the boom down function. If I combine any other function with boom down it works great. I was able to duplicate the same issue with bucket curl. It feels like it isnt sensing the load or something.
What Dash series is it? Were there any codes? Maybe a serial number and hour meter reading if you have them.
It has around 8500 hours, Ill try to get a serial number.