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Old 07-13-2018, 10:34 PM   #1
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Adjusting HWH FWS on DS

Iím thinking many of you may be familiar with the procedure Iím about to describe, but I thought Iíd post it here for those who might have this problem down the road.

We have been here in Wyoming for the past several weeks with our 2017 DS. Yesterday morning we broke camp near Dubois, WY, to head north to Cody for a few days.

I brought all the slides in after airing up and stowed the jacks. Then I did my routine final walk around. On the driver side, I was surprised to see my FWS was out about an inch. I thought I must have released the switch too soon, so I went back inside and hit the switch again. It snugged up and then, almost immediately, began to creep out again. It stopped at about an inch.

Ran through the same routine a couple more times with the same result. So I called Newmar CS and talked to Craig and then Mike. It turns out there are two tab valves on the hydraulic system -

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These tabs or valves can be used to purge air from the lines. You just depress the tab 90 degrees and then pop it back. In my case, depressing the bottom one did nothing, but when I depressed the top one, I got a short hiss of air as it was bled out from the line.

I ran the slide in and then out a couple times and the creeping action is gone.
The slide now stays firmly stowed. Quick and easy fix.
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Old 07-13-2018, 10:50 PM   #2
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Donít be surprised if the same thing happens again. Replacing the solenoid is the fix.
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Old 07-13-2018, 11:38 PM   #3
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Great information, thank you
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Old 07-14-2018, 04:52 AM   #4
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Where are these valves located?
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Old 07-14-2018, 06:30 AM   #5
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Good to know.
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Old 07-14-2018, 07:46 AM   #6
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Adjusting HWH FWS on DS

Quote:
Originally Posted by DrPhil View Post
Where are these valves located?


On my Dutch Star (2017 4018) you go to the curb side and open the 2nd basement door - the one with the slide in my case - and look up. You will see the large black hydraulic cylinder with the two valve/solenoid cylinders mounted on the end.

I believe others have posted on the process for removing and replacing one or both of these valves.

Jerry Davis may well be correct that simply bleeding the air is NOT a permanent fix. Over the next few weeks Iíll be watching this and let youíall know.
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Old 07-14-2018, 11:12 AM   #7
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Thank you deaton good information, another copy and paste for my trouble shooting folder.
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Old 08-26-2018, 12:24 PM   #8
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Similar problem on our 2018 DS 4018
  • sometimes the FWS isn't totally flush when retracted. and uneven, e.g. out more at bottom rear than top front. Maybe the worth of my finger in the worst spots
  • as we travel, the slide will creep out as much as a couple of inches over 300 miles
  • Guaranty RV spent several days finding air leaks and thinking they finally solved the problem, which it seemed they did over the next couple of legs and several hundred miles. But it has returned.
  • now i have to take it back. can't seem to get Newmar, HWH, and Guaranty on the same page 're solenoid, valve, or air in lines

I don't feel like spending another four days in junction city (no offense) while they explore and try different things

Anyone had this same problem?...and what was the fix?
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Old 08-26-2018, 01:21 PM   #9
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Quote:
Originally Posted by Mark71 View Post
Similar problem on our 2018 DS 4018
  • sometimes the FWS isn't totally flush when retracted. and uneven, e.g. out more at bottom rear than top front. Maybe the worth of my finger in the worst spots
  • as we travel, the slide will creep out as much as a couple of inches over 300 miles
  • Guaranty RV spent several days finding air leaks and thinking they finally solved the problem, which it seemed they did over the next couple of legs and several hundred miles. But it has returned.
  • now i have to take it back. can't seem to get Newmar, HWH, and Guaranty on the same page 're solenoid, valve, or air in lines

I don't feel like spending another four days in junction city (no offense) while they explore and try different things

Anyone had this same problem?...and what was the fix?
Not sure what air leaks would have to do with the FWS as I believe it is totally controlled by the HWH hydraulic system. Our FWS would creep out a couple inches and the fix was to replace the solenoid valve pictured earlier in this thread. Guaranty did the repair under warranty. Itís a simple procedure done in just a few minutes.
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Old 08-26-2018, 10:05 PM   #10
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Adjusting HWH FWS on DS

Well, I promised an update.

Itís been a month and a half since I bled the air from the hydraulic system and, so far, so good. No more creeping on the FWS.

I do believe that Jerry Davis is correct that using those two manual tabs to bleed the air wonít always fix this issue. If one or both of the solinoids are bad or thereís a leak in the system, you need a more complete repair. Iíll advise if the problem does recur.
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Old 08-27-2018, 08:47 AM   #11
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when you have the type of sync cylinder in the photo, the bleed procedure is to open both valves on the back of the cylinder, run the pump for 20 to 30 seconds. length of time isnt critical.
close them up and the bleed procedure should be done. thats what is done when the room mechanisms are installed.
not sure why there was air in the line after using the system for some time.
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Old 08-28-2018, 01:27 PM   #12
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Based on my description of the slide behavior, and photos, HWH says to replace the cylinder retract valve on the sync cylinder
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Old 10-19-2018, 08:46 PM   #13
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FWS not seating correctly

This has happened in the past and now again. When retracting the FWS the bottom comes in tight but the top is out about apprioximately 1-1/2 inches. The locking arms lock but not fulling seating.

I know there is a way to adjust and getting an appointment at any RV show now is next to impossible ( especially if you didn't buy from the dealer - usual story). When this happended in the past the shop said it was a small adjustment.

So does anyone know how to rectify this or what is the adjustment to be made? I am aware of the control panel under the opposite slide; but I have never ventured into this unchartered territory.

Any suggestions or advice. Open to almost anything.
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Old 10-20-2018, 11:34 AM   #14
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there is no adjustment needed for this. the room is adjusted at the factory, and should remain that way.

there is no air in the lines. thats fluid pressure you hear bleeding off.

what is happening is there is a small piece of debris in the line that has lodged in the orifice of the valve. by opening the valve, the material is moved, and the valve can close completely.
if it does it again, open both valves and run the pump 15 to 20 seconds. close them and run the room. next time, replace the retract valve. that is the recommended hwh fix.
my suggestion is to find and download service manual and read it. it has a ton of information and diagnostic procedures to do a correct diagnosis of the system.
i know i beat the service manual bit to death, but if you dont already know how to fix it, what other source do you have?
there is no magic reset button or fuse to replace on hwh systems. it does involve testing before replacing.
i also know it takes a couple of weeks to get a reply back from hwh. it pays to invest a little of your time in order to give the hwh tech information that you should have already gotten in order for him to help you. this is why it takes so long for them to get to you. we dont hang up on anyone, even if you dont know what a pump is, let alone where its at.
if you need help, i can do that. my cell is 1-602-549-3638, my email is pfmaddox@att.net please dont call sundays unless its an emergency.
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