Good luck getting parts for it, better off trying to get a couple of stuffed ones and make one good one, other than that I have a 100 amp ebay jobbie on my 4.2, looks identical to the hitachi, no issues at all, been nearly 12 months now, got a 110 amp spare in the shed supplied by the auto leckie as a warrantyreplacement for the stuff-up on the original repair, looks like it had a vac pump on the back, but the shaft was machined, and theres a rubber plug in the back now.