Hey gents I'm stumped. Our d85a-12 komatsu is having a session. I changed out the steering and torque converter pumps and immediately blew the seal out the front of the steering pump. This floods the converter and is no good. However I have no idea why this is going on, the relief is relieving, the filter is good, it should bypass anyhow, the lines are clear yet every time I replace the seal it does it again. Any ideas? Ever seen this before?
1 Judging from this simplified schematic could be possible that main relief is set to high causing higher than normal leakage in pump which causes pump seal to fail.