Front Lifting Jacks Keep Blowing Fuse

[Igoo65]

I have a new to me 2007 Montana 3000RK and everytime I lift the front I blow the fuse that is going to the relays that are attached to the batteries. Do I have bad relays or could there be another problem? I attached a picture of the 2 relays. The fuse is attached to one of the orange wires. Sorry the picture is upside down.
Thanks for the help!


Igoo65

[jcurtis934]

Those bimetallic self resetting breakers get pits burned in the contacts every time they open and reset. This means more resistance which means more current and heat in the circuit. Time to change the one for the front landing gear.

[Igoo65]

Thanks for the information! I appreciate it.

Igoo65

[airboatart]

They are only 50amp should be replaced with 80 amp

[Igoo65]

This is probably a stupid question, but here goes. Should I replace both of them with 80 amp or just the one connected to the pump? I found two breakers on Amazon,. I'm not sure which one I should use.
https://www.amazon.com/dp/B001PTBVLW...v_ov_lig_dp_it

or

https://www.amazon.com/dp/B008QDI9HY...v_ov_lig_dp_it
Thanks for your help.
Igoo65

[Texan]

Just the one connected to the pump. I used the manual reset but the automatic should be fine also but I am sure others will chime in as to preference.

[WeBeFulltime]

Originally Posted by Igoo65

This is probably a stupid question, but here goes. Should I replace both of them with 80 amp or just the one connected to the pump? I found two breakers on Amazon,. I'm not sure which one I should use.
https://www.amazon.com/dp/B001PTBVLW...v_ov_lig_dp_it

or

https://www.amazon.com/dp/B008QDI9HY...v_ov_lig_dp_it
Thanks for your help.
Igoo65

Actually on a 2007 Montana the pump has nothing to do with the front landing legs as they are 12 volt motor driven not hydraulic.

[Dean A Van Peursem]

He doesn't have the resetting type fuse if it is connected to the relays as he has described.

[BB_TX]

Clarification needed. Are you blowing the in-line fuse in the orange wire? Or tripping the auto reset circuit breaker?

If it is the in-line fuse that is blowing, that has nothing to do with the auto reset circuit breakers.

Mine is also a 2007 model and has the in-line fuse in the orange wire to the jacks. The only time I have ever had it blow was when I forgot to loosen my JT Strongarm stabilizers before trying to raise my jacks. After blowing 3 fuses one after the other it finally dawned on me what my problem was.

[Carl n Susan]

A 2007 has the old style Ventura electric landing legs. The 50/80 amp breaker issue is not applicable here. The 30 amp fuse on the orange wire leading to the gear motor is adequate. If it is blowing it implies there is a problem with the leg(s), likely binding or bent.

[Igoo65]

I first blew the inline fuse when I initially lifted the legs. I replaced the fuse and then the breaker went. The legs seam to go up and down smoothly. I don’t see any binding.
Igoo65

[Dean A Van Peursem]

Originally Posted by Igoo65

I first blew the inline fuse when I initially lifted the legs. I replaced the fuse and then the breaker went. The legs seam to go up and down smoothly. I don’t see any binding.
Igoo65

Which Breaker?

[spantz]

Had the same issue. I ended up replacing the landing legs ($200) myself and now no more issues. Look on amazon.

[Carl n Susan]

Lifting the legs too far will cause the fuse to blow. I don't understand how the 50 amp re settable circuit breaker would trip running the legs. The 30 amp fuse should go first. I haven't seen a 2007 era wiring for a while. I am guessing the left CB is the one with the orange wire and fuse to the leg motor? Is there a picture from a little further out that show more of the wiring?



You say the legs work smoothly. Is that under load? If they are smooth running then I would look at the drive motor.

[BB_TX]

My orange wire with the in-line fuse is connected to the circuit breaker terminal that has the wire that goes direct to the battery. Meaning the jacks operate directly off the battery and independently of the circuit breakers and would not trip the breaker no matter how much current the jacks pulled. Can’t really tell from your picture but yours looks to be the same.

[Igoo65]

Here is a better picture of my wiring. I pulled the batteries out of it for storage.

[Nib]

Originally Posted by Igoo65

Here is a better picture of my wiring. I pulled the batteries out of it for storage.

Hi...glad you posted this, as I am just taking possession of a new-to-me 2008 3000RK. It's 200 miles away right now but spring and summer aren't far away! Would you happen to have any more pics of your hydraulic pump area and electric motor for the front landing legs? Just trying to learn the system a bit before I actually get to my rig!

Cheers, and happy camping in 2021,
Richard in Canada

[Igoo65]

Originally Posted by Nib

Hi...glad you posted this, as I am just taking possession of a new-to-me 2008 3000RK. It's 200 miles away right now but spring and summer aren't far away! Would you happen to have any more pics of your hydraulic pump area and electric motor for the front landing legs? Just trying to learn the system a bit before I actually get to my rig!

Cheers, and happy camping in 2021,
Richard in Canada

I will try to get some pictures today and post them. I di finally replaced my lifting motor with a heavy duty unit. I haven't had a problem since.
Igoo65

[twindman]

I had a leg get bent because I parked on a slope and didn't have the wheels blocked good. After that when one leg was halfway down, it would start to bind. I installed a new leg and all was okay after that.

[jimcol]

My rig is just a year older than yours so probably the same set up. Once a year I drop a little 90 weight rear end grease down the top of the legs to lubricate the screw shaft inside the leg assembly. Then I pack the bevel gears in the top of the leg assembly with grease. Learned this off this forum and have never had a problem.