Originally Posted by BLAdventurer
Update, everything is now working. Thanks for all the suggestions. I plan to have the system gone over when I get home. Flushing the hydraulics seems like a good idea especially since so many parts have been replaced and different people doing it. Hopefully no more problems.
I was looking for something and came accross my HWH manual. The fluid diagram desribes how it works if you want to know.
1. Shuttle valve. That valve is between the pressure line to the solenoids and the return line from the solenoids. When it has shuttled to one position it sends the fluid under pressure to the manifold that each individual jack solenoid is attached to. As the solenoids are opened for leveling fluid under pressure is routed to each jack forcing it to extend.
When the shuttle valve is in the other position it connects the return line to the tanks with the manifold the individual jack solenoid is attatched to ( same manifold and individual jack solenoids) When you go to store the jacks all of the solenoids are engaged and the hydraulic fluid is returned to the storage tank allowing the springs to pull the jack back into the storage mode.
This is a very simple system. The fact that you had so many problems really makes me think your fluid got contaminated.