Motor ran no fluid flow.
Unable to remove fiberglass hinged cover over power unit/battery.
I little man handling and it cam off.
Disconnect pressure line, no flow.
Took power unit to shop and going from shop to shop with little help
Shop claims solenoid that operated lower valve shot and no parts.
I believe the valve cartridge has junk stuck in it and won't move freely.
Bought 4 qtr. single acting Vevor power unit $171 delivered.
This power unit is ~17 inches long and the old one is 16.5 so it a tight fit.
Mounting bolts are not in same place but just used one (underneath).
Buddy helping insisted the vent/return clear plastic need to be hooked up.
Finally convinced him after getting fittings and hooking pressure gauge ($12 amazon) that the 'return' is just for venting the ram/cylinder.
Had 1 foot hose made with trailer side threads on one end and pump one the other (pump port not on top but on front as installed.
Wired it back and the top goes up and down.
Small amount of fluid comes out the 'return' = residual from when original pump valve was stuck in lower mode.
New pump does not ground via mounting bolt so used jumped cable to 'ground' to frame so the electric jack I added works!
Going up pressure ~600 psi, holding ~300.
Here is the power unit I bought, no manual pressure release!
shortest single acting I could find, $171 after Honey $10 discount.
1' hose and several fittings ~$66, made while waiting.
Labor, $40 (2 hrs) manhandle cover, loosen fitting and test, remove power unit.
Repair shop no charge to attempt to fix (then screw up!)
$20 (1hr), after new pump arrived to get ducks in a row/what hose/fittings we need.
$100, ~3.5 hrs driving back and forth to hose shop, installing and getting to work
At this point the up/down switch is not connected, instead am using the 15' remote up/down that came with new power unit.
Have vent/return line stuck in empty quart oil bottle to collect any 'returns' (will monitor), could at some time plumb this line to reservoir drain if needed.