Broken floor jack

Anyone know how to fix a floor jack with a failed pump? I have one of those floor jacks that have two pumps and it looks like one of the them is stuck in the down position. Because of this, the jack can't lift to the maximum load and range. Fluid in the cylinder isn't bad. It's the actual pump that is compressed down when you move the lever down.

It's a 3-ton aluminum floor jack that I've had for about 4 years.

 

prob help if you gave us a brand and model number. Could be just a checkvalve locked. there really isnt much to them.

 

Every po-dunk industrial town used to have a hydraulic shop. sigh.

 

I refilled the main cyclinder but don't know if the safety valve holes are the same process.

 

not the same jack but similar. May help you out.
https://www.garagejournal.com/forum/showthread.php?t=392962

 

check if there is oil in the reservoir. A lot of these types of jacks are seriously low on oil from the factory.

 

living in Outer Podunk I have been using the same hydraulic repair shop about 40 years .

They say unless you can fix it yourself most of the off shore built stuff is not worth fixing out of warranty