I have all but given up on the compressor. Other who have purchased this compressor here seem to have the same problem, including some on this forum.
Ran perfect for about 51 weeks after purchase.
Then it started to shut off at different pressures.
Sometimes it will go to 120psi, others times it will drain down to almost zero and then start up and turn off at 30, 50 or what ever pressure. It was not consistent at all with the off and on psi settings. Many times it would just shut off and no head pressure release. It would try a restart and stall.
I purchased a new pressure switch. No change. Was told it was possibly the capacitors. Changed them. By now the repair cost was getting to the point of "you got to be kidding"
It now sits in the garage while I decide to toss or use as a boat anchor, oil removed first of course?
A Hitachi repair shop here had numerous ones in the shop with the same problem. I was told they had no idea or solution for it.
Oil was changed religiously.
I noticed that at Home Depot it wasn't available awhile back. Now it is being offered again.
Does anyone know if the "problem" was fixed or not.
This has to be a PR nightmare for Hitachi.
I got this as a package with the nail gun.
One thing that got me really upset was when the using it and doing finish brad finish nailing, pressure had dropped and not restarted. Had to replace the trim piece.
Any ideas?

Thank you
Steve