Hydraulic Leveling and slide quit working

[Steve 224]

I have a 2016 Momentum M-Class 5th Wheel. After Dry camping this weekend. I attempted to hook the 5th wheel up to my truck. Initially the front legs started to extend then they stopped and the controller beeped. I gave me an error message that function was not available. I have a second controller that I switched with the same result. I also disconnected all power and hooked back up with no results. We then noticed that the big slide in the liven room will not move either. Cannot move any legs. You can hear the solenoid by the hydraulic pump click when a button is pushed. No fuses are blown and all breakers are on. Voltage is 13.3V without the generator on. Tried to jump it just to make sure. No Joy. HELP!

 

[triplethreat]

I have a 2016 Momentum M-Class 5th Wheel. After Dry camping this weekend. I attempted to hook the 5th wheel up to my truck. Initially the front legs started to extend then they stopped and the controller beeped. I gave me an error message that function was not available. I have a second controller that I switched with the same result. I also disconnected all power and hooked back up with no results. We then noticed that the big slide in the liven room will not move either. Cannot move any legs. You can hear the solenoid by the hydraulic pump click when a button is pushed. No fuses are blown and all breakers are on. Voltage is 13.3V without the generator on. Tried to jump it just to make sure. No Joy. HELP!

The big solenoid by the hydraulic pump.........are you referring to the electrical contactor that starts the pump motor? If so, check to see if it has the 13.3V present at the contactor.

 

[Steve 224]

It does have power on the connector side but not on the HYD pump side

 

[triplethreat]

Is there any way you can have someone try and operate it and at the same time, you have a meter on the terminal that goes to the hydraulic pump to check it that way?

 

[Steve 224]

Thats a great idea. Unfortunately, we had to leave it at the site yesterday. I wont be able to try that until this weekend. Do you think it is worth grabbing a replacement solenoid just in case?

 

[triplethreat]

Thats a great idea. Unfortunately, we had to leave it at the site yesterday. I wont be able to try that until this weekend. Do you think it is worth grabbing a replacement solenoid just in case?

That's up to you....Personally, I hate to spend money on a repair until I know 100% that the part is defective/bad. You do know (hopefully) that there is an "auto reset" type breaker that feeds the hyd. pump circuit. In the year that your unit was built, GD was putting a 50A auto reset breaker in there. Sometime in 2018 or 2019, they finally figured out that the 50A auto reset breaker was NOT big enough and started using 80A auto reset breakers. I had one of the original 50A breakers in my 2018 Momentum and they sent me a new 80 amp breaker to replace it for free. Those are a "known" suspect item that fails somewhat often. You can buy them for around $25. If that is what is causing the issue with your trailer (not getting 12VDC from that breaker, it's certainly a LOT cheaper fix than the directional contactor that you hear clicking.

 

[Steve 224]

I was aware of the breaker but have no idea where it is. I agree. The breaker sounds like it might just be it.

 

[triplethreat]

I was aware of the breaker but have no idea where it is. I agree. The breaker sounds like it might just be it.

They are on the back wall of your front compartment....the same compartment as the hydraulic unit....normally at the bottom of the stack of breakers. In the pic. below, the breaker on the very left of the pic is my 80A added on breaker (it's got a double set of 6ga wires on it). OEM location of the 50A would be at the bottom of that vertical row of breakers right below my add on one. You should be able to follow the wiring from the hydraulic pump motor's reversing contactor, back to the breaker that is for it.....

 

[txloser]

I’ll be curious to hear what the fix is here.

I’ve got the newish 80amp self reset fuse and had this happen when my trailer was new. Was going to unload the trailer from the truck. Jacks came down almost to the ground but never touched, got the error message and that was it. Couldn’t move them back up or down. I could only hear a click. Some time passed while I phoned the dealer and checked wiring and then it worked. Hasn’t given me an issue for a year now.

Hope yours fixes itself at some point at well.

 

[dudkas]

Did you get it fixed? I had the same issue with my Heartland with HYD gear and slides. They would go down and out but not in and up. Here is my post on the Heartland Forum Intermittent Lippert Level-Up operation. If you cannot access the link I can send you the details. This was the issue after many RV TECHS who were supposedly experts, couldn't figure it out. Reverse Contactor Solenoid.

 

[Steve 224]

They are on the back wall of your front compartment....the same compartment as the hydraulic unit....normally at the bottom of the stack of breakers. In the pic. below, the breaker on the very left of the pic is my 80A added on breaker (it's got a double set of 6ga wires on it). OEM location of the 50A would be at the bottom of that vertical row of breakers right below my add on one. You should be able to follow the wiring from the hydraulic pump motor's reversing contactor, back to the breaker that is for it.....

I think you nailed it. Had the guy come out this morning? He said the breaker is bad. It had a 30 amp in. It said he would replace with a 50. I told him to go bigger. I’ll let you know how it ends up when it gets replaced. Thanks again.

 

[triplethreat]

I think you nailed it. Had the guy come out this morning? He said the breaker is bad. It had a 30 amp in. It said he would replace with a 50. I told him to go bigger. I’ll let you know how it ends up when it gets replaced. Thanks again.

Glad I could help....I've been there and done that! LOL I've got a full size Momentum triple axle trailer, and I've put my amprobe on the cable going to the motor circuit to see the amount of current flow when the motor is running/pumping and moving the front landing gear. There is a constant 68 to 70 amp draw on that circuit, and the reason that the original one that was put in there when new, would fail for a lot of folks. Keep in mind, when the temperatures are colder......say in the 20s or 30s, that current draw will likely go even higher as the viscosity of the hyd. fluid is a bit thicker when cold.