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09-09-2018, 05:33 AM
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#1
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Seasoned Camper
Join Date: Mar 2018
Location: Macomb
Posts: 88
M.O.C. #21413
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Slides won't open
Ok kids, here's my problem. Got a 2018 3720RL with three slides. The bedroom is electric and the two rear slides are hydrolic. Had it for a year now and everything worked great. Just went out to open her up and the bedroom worked great but the two rear slides won't do anything. No sound, no nothing when I push the switch. I'm hooked up to shore power. Any ideas?
Kemo
__________________
Kemo & Gayle
2018 Montana 3720rl
2017 F-350 Lariat Supercab
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09-09-2018, 05:52 AM
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#2
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,896
M.O.C. #9561
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some suggestions from another site:
1. A hydraulic leak in one of the hydraulic lines or pump itself could be causing the hydraulic pump to run, but it does not have enough hydraulic fluid pressure to operate the slideout.
2. A bad hydraulic valve could again cause the hydraulic pump to run, but not enough fluid is getting to where it is suppose to, to move your slideout out.
3. A bad hydraulic pump. The noise you are hearing could be the pump trying to start up. Since you are hearing a noise when you press the slideout switch, I am not going to suggest that you check for a blown fuse.
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09-09-2018, 06:32 AM
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#3
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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The 40amp auto-reset breaker on the hot wire from the battery to the hydraulic pump may have gone bad. This is a weak point in the system and most people replace with a 80 amp.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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09-16-2018, 05:13 PM
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#4
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Established Member
Join Date: Apr 2015
Location: Marysville
Posts: 26
M.O.C. #17348
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Slides don’t work
Quote:
Originally Posted by mazboy
some suggestions from another site:
1. A hydraulic leak in one of the hydraulic lines or pump itself could be causing the hydraulic pump to run, but it does not have enough hydraulic fluid pressure to operate the slideout.
2. A bad hydraulic valve could again cause the hydraulic pump to run, but not enough fluid is getting to where it is suppose to, to move your slideout out.
3. A bad hydraulic pump. The noise you are hearing could be the pump trying to start up. Since you are hearing a noise when you press the slideout switch, I am not going to suggest that you check for a blown fuse.
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Hope you have better luck than I did with the same symptoms. A rat had chewed one of my hydraulic lines and the oil was dumping into the under belly. Big problem. Had to remove the underbelly and have the lime replaced. Fortunately I’m prett handy and did all the work myself so it only cost me $60.00 to repair the line. If it had to go into a shop it could have been astronomical.
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09-09-2018, 06:31 AM
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#5
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,932
M.O.C. #20477
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It sounds like an electric problem with the hydraulic pump. Would call the Lippert service center for help troubleshooting.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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09-09-2018, 06:37 AM
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#6
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Since you hear absolutely nothing, no noise of any kind, I would start by testing the switch itself.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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09-09-2018, 06:42 AM
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#7
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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Might be easier to test the voltage on the motor side of the 40/50 amp resettable breaker. BTW replacing the breaker was one of my first mods.
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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09-09-2018, 06:43 AM
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#8
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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What I replaced was a 50 amp breaker.
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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09-09-2018, 09:44 AM
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#9
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Montana Fan
Join Date: Aug 2018
Location: Overland Park
Posts: 108
M.O.C. #22381
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Hydraulics
Does the rest of your hydraulics work? If your front legs and rear stablizers function normally, you need to look at your slide out switch and wiring.
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09-12-2018, 04:25 AM
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#10
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Seasoned Camper
Join Date: Mar 2018
Location: Macomb
Posts: 88
M.O.C. #21413
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Thanks all. Yes my auto jacks work fine. I've checked all the fuses I can find and they're good. Where are breakers located? We came back from Labor Day camping opened it up fine. Closed it and now nothing. Bedroom works fine, just the two rear slides. (different switch) Would the switch really just stop like that? Big question would be is this a warranty issue I could take to a dealer for fix?
__________________
Kemo & Gayle
2018 Montana 3720rl
2017 F-350 Lariat Supercab
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09-12-2018, 07:32 AM
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#11
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,659
M.O.C. #9969
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I would pull the switch out, carefully, as most of the connections are just fast-on connectors and one could have fallen off. I had an awning that just stopped working and that was the problem. Just something quick and easy to check.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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09-12-2018, 12:24 PM
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#12
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Have had rocker switches fail on me. Cheap and easy to replace. Re warranty question best bet talk to the dealer you want to take it to.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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09-12-2018, 03:20 PM
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#13
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Established Member
Join Date: Jan 2018
Location: Amherst
Posts: 40
M.O.C. #21043
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Had the same problem with my slides. Found a two 50 Amp breakers in series. Replaced with One 100 Amp breaker.Slides work better than ever. The Lippert motor is rated at 100 Amps. The current draw was reading 6.8 -7.4 causeing the slides to stop and the jacks to stop till the 50 amp breakers reset.
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09-13-2018, 04:10 AM
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#14
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Seasoned Camper
Join Date: Mar 2018
Location: Macomb
Posts: 88
M.O.C. #21413
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paul01: where was the 50 amp breaker located? Thanks.
__________________
Kemo & Gayle
2018 Montana 3720rl
2017 F-350 Lariat Supercab
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09-13-2018, 06:36 AM
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#15
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Established Member
Join Date: Jan 2018
Location: Amherst
Posts: 40
M.O.C. #21043
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The breaker is on the + [hot] side of the battery leading to the pump.
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09-13-2018, 07:07 AM
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#16
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Seasoned Camper
Join Date: Mar 2018
Location: Macomb
Posts: 88
M.O.C. #21413
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Thanks. Found it. Looks ok. Was your slide NOT working or working slow/sometimes?
__________________
Kemo & Gayle
2018 Montana 3720rl
2017 F-350 Lariat Supercab
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09-13-2018, 04:50 AM
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#17
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Seasoned Camper
Join Date: Mar 2018
Location: Macomb
Posts: 88
M.O.C. #21413
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Appreciate the responses. So here's what we know so far...
1. When toggle switch for main slides pushed nothing. No sound, no motor, no click
2. All breakers and fuses in power panel ok.
3. Fuses I found in front compartment with pump looked ok to me.
4. Battery seems to be fine.
5. Checked toggle switch behind control panel, no loose wires I can see.
6. Hooked up to shore power as well.
Questions:
1. Is there only one hydraulic pump for jack legs and slides? One motor?
2. Is the wall toggle switch a pop out? Meaning can I just pop it out of the panels without unscrewing the whole thing?
3. How do I do a manual extension/retract? My rig is a Four Season with closed underbelly. Do I have to open it up to do manual operation?
4. How do I check the toggle switch to see if bad?
I really don't want to take it into dealership and tie it up for months for something simple I might be able to do. You folks have most likely fixed/replaced on your own with your experience. Thanks in advance for any help.
__________________
Kemo & Gayle
2018 Montana 3720rl
2017 F-350 Lariat Supercab
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09-16-2018, 01:11 PM
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#18
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New Member
Join Date: Oct 2015
Location: Port Angeles
Posts: 3
M.O.C. #17989
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Just a thought.....Did you insure that the"bypass" switches (usually in the control panel) have not been turned off?
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09-13-2018, 07:42 AM
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#19
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Montana Master
Join Date: May 2006
Location: Ronan
Posts: 513
M.O.C. #5756
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You can not tell if 50amp breaker to your pump is bad by simply looking at it. It is a self resetting breaker. Your pump for your level up is the same pump for your slides so if it works for level up then it is ok. Now for your slides I have had this problem only once and changed the 50 amp breaker with a 80 amp breaker found at Oriley’s. Easy way to check breaker is to put a volt meter on both sides of the breaker 12 volt in 12 volt out is a good break. Now to the switch. All the switches in my panel pop out but I took the panel out and checked allpush on connectors and found several loose connections. All fixed with a pair of wire pliers. If your pump works for level up it’s not the pump it a bad switch bad breaker or bad wire someplace in the front or panel. That where I would start. Hope this helps just a little.
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09-13-2018, 07:46 AM
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#20
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,167
M.O.C. #6433
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Mine is older so yours may look different. But there should be an auto reset circuit breaker that supplies power to your hydraulic pump. Probably two breakers with one for the pump and another for other things. Picture shows mine under the red covers. And they look something like this when the cover is removed. https://www.delcity.net/store/12V-Au...98669.h_198846
There should be +12 vdc on both screws of all these breakers, battery side and load side. You can't tell by looking, will need to check them with a volt meter. I would make sure of that before tearing into the switch and wiring. If you do not have +12 vdc on the load side of the the breakers, you have a bad breaker(s). If you do not have +12 vdc to the battery side, you have a +12 vdc supply problem.
If you do have voltage on both sides of both breakers, then your problem is apparently in the switch circuit. Or in the reversing polarity contactor sitting on top of the pump. Or a bad pump motor. Or???
Another possibility is loss of the ground wire connection from the pump to the trailer frame.
Lots of things to check. Do the easier ones first.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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