Welcome to JUST ANSWER small engines, let me try to help you !!
Electric motor driving a hydraulic pump , with a resovoir for oil, a control valve and a hydraulic cylinder?
It extends but does not retract? Loosen the hose on on the rod end of cylinder and work the hydraulic valve, do you get oil pouring pou?
hydraulic cylinder is enclosed inside the body of the machine.
will I get another answer?
Does it extend?
Ok, can you remove the cover over the cylinder?
Can you get to the control valve?
i can remove end with the valves
Can you find it on-line and attach the link, so I can see it?
How do you swap from extend to retract? or is it automatic?
Can you make picture and attach it using the paperclip icon above the typing bar?
Look at these, look like any of the group?
lower the valve handles to split then relice to retract
Are handles returning full distance?
On backside of valve , do you see two plugs identical?
Remove the plugs and swap the valves that are under them.
Look for any debris on either valve.
May be just a spring and a ball. But look for anything that might keep valve from seating.
Be sure it is not plugged in!
ok i will try that and see what hapens