One jack not working

Thanks for all the advise. I got it all apart and the gears are showing some wear and the threaded insert is a little loose. My new lead leg is on order and will be here Monday. Hope to be ready to go again soon.

Thanks
Daniel

Cowboy,

A few years ago, I had a shear pin on my 5er snap off. Shortly after I replaced the pin with a solid screw, the jack was making a squealing noise.

In the end, I connected the truck to the 5er, and remove the front jacks, one at a time.

What I found was all the grease they had used when it was assembled was dry and it wasn't almost impossible to run the screw part of the jack through the nut.

A bit of elbow grease, some brake cleaner and a high temp bearing grease assembly and I've never looked back.

I also had to grease the gears in the drive head as well - the grease had gotten dry.

More than likely, a shear pin due to lack of lubrication snapped and that's the culprit.

Take your time, use your phone and take lots of pictures when you disassemble - and you'll be golden in a couple of hours.

Josh

They are electric jacks. I will take them apart this week to look inside them.

Thank you

Daniel

Are these jacks hydraulic? (Sounds like they are) if so the valve may have failed one of two ways..

Find the vlaves take a piece of feromagnatic metal (Flat not edged) (Means magnets stick) and while partner attempts to lower the jack from control panel hold the thing near the coils.. If coil working the metal will snap to as it were (I like rubber covered metal.. Dip it in Flex Coat)

NOTE to extend jacks ONE valve per jack on some RV's on others front jacks have one valve between 'em.

if the magnet test is good the valve may have an issue.

If the screw is turning, then it could either be the bevel gear is spinning on the leg shaft and not turning the screw, maybe the shear pin has broken. Or the part of the leg that moves up and down on the screw has stripped out and isn't moving. You should be able to remove the inner leg and look up inside the leg and see if the screw is turning.