Pump rebuild

[subdude]

I have a gear type hydraulic pump that is PTO driven. I do not know who makes it since name plate data is missing. It has two input shafts, near as I can figure, I can drive either shaft dependant on pto rotation. It also has one spool valve that can be pushed or pulled from either side. The pump housing is oval with I think eight bolts. I have seen these pumps on old dump trucks. Can anyone identify this pump. I need parts and specs but cannot find it anywhere. Thanks in advance.