Recent content by eddychecker

I zoomed in on picture and put arrows where it looks like there are tiny gouges. If it's not perfectly smooth, oil pressure will leak and you'll have a loss of power. These machines whine, at least both of mine do. If it's just the noise you're worried about, don't. Here's the picture:

Have you solved your problem? If not, have you tried valve lapping compound between the pump gear and the plate and the pump gear and the output? Looking at your pictures, it looks like there are tiny gouges on each of those surfaces. Oil will leak past them and not drive the unit.