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I fluid film the $hit out of all my equipment once a year and every thing has held up beautifully. It’s a rust preventative/ lubricator. Designed for navy and nasa, it must be good!

I read on another post on this site that someone had a similar issue and as being a mechanic myself I have messed up quite a lot so I figured there was a possibility. Everything is labeled now for the future. The cab lock is still dripping with the raise and lower valve but I can deal with that...

OKAY! upon further review. The 2 lines on the hydro pump were reversed. Not sure who in Tennessee unhooked them but they are on the correct way and everything works as it should. Now I have to go find the three wrenches I threw in the woods! Thanks for all the help and input guys! have a good...

Okay-- last ditch effort.... if hydro pump is bad what if I disconnect the pressure and return lines and joint them together to bypass the pump and see if the manual pump works? that would rule out a bad pump or pump seal right? update- still wont build pressure but I do notice the cab latch is...

what would happen if the lift piston was seized?

flushed system. Topped off hydro fluid. Bled every line possible (within reach). Good pressure coming out of air/hydro pump. Cracked a line on cab lift piston bled that. Still unable to lift cab. It wont even move an inch. Spare tire piston wont activate either. manual pump will not lift either...

Great info thank you everyone! I'm going to try flushing the system and bleeding it and see what happens from there! Tons of info on here!

negative, cab is not pinned

I took off the cab latch hydro line and the fluid "dribbles" out when the pump is on. All the valves are in the correct position.

I'm having same issue with my LMTV. I can hear the pump pumping but it will not raise. The manual pump will not raise it either. I unbolted the 15/16 nut for the cab lock thinking the cab lock was stuck but it still will not raise. Any suggestions? is there a way to test the pump?