The rest of our Sun Hydraulics order arrived! These manifolds have a solenoid valve inserted at one end, and would usually have pilot operated check valves on A and B which are piloted from the operation of the solenoid. We have replaced the pilot check valves with 5:1 counterbalance valves, so in normal operation the counterbalance valves should be help open by the pilot lone from the solenoid. When the solenoid is off, they should act as pressure relief valves to the rams.
