[hew]

Thanks Herb, yes we used a power pack which may have had a better pressure than the engine pumps. I love your electric drill adaptor to turn the engine pump. Saves a whole lot of hassle. Did you have a pressure gauge on the pump outlet side to see what was going on? What size drill (watts)?
I am leaning toward the hydraulic filters partly blocked or the solenoid sticking or intermittent electrical fault on the up lock switches / up-down switch. We've had a few other problems where soldered connections are broken but held together just enough by the heat shrink insulation.