Posted by Paul Janke on January 21, 2018 at 18:32:59 from (216.166.169.3):
In Reply to: hydraulic valve posted by Whiskey Bent on January 21, 2018 at 15:57:08:
This is kind of a wild guess. If you just move one handle at a time does it work OK? I am guessing it is a series valve and when the cylinders are retracted, they push more oil to the downstream cylinders than what they are getting from the pump (there is more oil in the barrel end of a cylinder than there is in the rod end). If both sets of cylinders are retracted at the same time then there is a lot of oil trying to get through the lines and the valves which can cause lots of back pressure.
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