hydraulic jacks want go down or up

[Donald_Duck]

1998 dolphin 36'. Can not get leveling jacks to move period. They are in up position at this time, but cannot get them to move at all. We operate them from inside the cab. Have checked fluid and anything I can think of. Stumped???? Any suggestions out there would be greatly appreciated.

[dougrainer]

Does the jack pump motor run??? Does the dash jack pad come on? Do you have the 12 volt disconnect for the Interior RV ON? National Motorhomes required the coach battery disconnect to be ON for the jacks to operate. Doug

[PatStab]

Just a comment about hydraulic jack, in case someone else has this problem.

I had my jacks down for several days while doing odds and ends to the motorhome. I needed to move it to mow alongside. I raised the jacks, the right rear indicated it was not raised and the jacks down light was on.

I went out and looked it was up. I did it 2 or 3 more times, put down and raised, lights would not go out. I'm reading and thinking low hydraulic fluid or some other dire problem. So I put it down again and went out and looked. We had put a lot of new white rock on the driveway. Up on the footpad was quite a bit of white rock, some of fair size. I thought, might as well clean them off and see what that would do. Well wouldn't you know, apparently the rock was keeping it from going up all the way and registering they were up. That fixed the problem. Just thought this might help someone else. Just didn't realize that would cause that.

[Fishinghat]

Since your electric steps also won't work (from your previous post), I'm going to assume it is due to a failed relay. When you turn your key, a relay turns power on to some things (like your windshield wipers) and turns off power to other things (like your leveling jacks). I'm not familiar with your coach, but in my coach the relays look like tiny beer cans with a copper bolt on each side and two much smaller bolts near the bottom. You should have several, perhaps four or more. They eventually wear out, like a starter solenoid on a car. In fact, the look very similar.

Checking them is actually quite easy. Just have someone turn the key and listen. When you hear the clicking, you've found the relay responsible. If they are working, then you'll need to check to see if power is being passed thru or not.

Good luck.

[Yaj]

Battery charged?