J_J said:Do you know for sure that the 3 spool valve has a power beyond circuit?
Yes JJ the OEM 3 spool valve is a Sauer Danfoss model 1637 -tag#156B2294-code# 1637-TSTSFA14NS. The 3 spool valve has a power beyond port machined and plugged (use whenever a downstream valve is required ). The 422,425 2425, ( and I think the larger PT's) use the same valve.