[Kurt in NJ]

in looking at the evolution of the dipper tray, and mentions of changes to help oil consumption my thoughts are the oil pump shield was also used in the time frame of holes in dipper tray---being that the center cam bearing is pressure oiled it can also "leak", and if the clearance gets about .005 the bearing clearance area is about the same as the oil discharge pipe in the valve chamber ----so the shield insures that all the oil hits the tray ----this keeps the dipper troughs filled, to limit the tray from being overfilled at multiple angles holes were added,