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HWH Slide Mystery

Yahoo Message Number: 115793
I have a bit of a mystery with my HWH slides where I intermittently lose the ability to activate the slides (more specifically the hydronic pump). I have a 2005 Magna 630 Rembrant with quad slides. I have always leveled first (no problems leveling via the HWH system) and once level activate the keyed panel for the slides (either front or rear), get the solid yellow light indicating its ready, and then depress the "extend" or "retract" button on the HWH panel. Usually I leave the engine running if I've just pulled in to a park to keep the chassis power up (although I also have new chassis batteries). But when I depress the button, its 50/50 whether the system activates the hydraulic pump. If it does, I'm lucky if I can get all four slides to do the same. Typically the pump works for 1 or 2 and then no go for the 3rd or 4th. If I wait (30-40 minutes) and try again, sometimes it works. In a pinch, I have used a high gauge wire to "jump" the solenoid in the electrical bay to manually activate the pump with my wife depressing the switch, but I generally don't try this for fear of over pressurizing the hydronic lines... this has been done only when absolutely necessary and only enough to add enough pressure to retract or extend. So far I don't think its a leveling issue, or a power issue. Can't figure out what is intermittently causing the HWH system to fail to activate the hydronic slide pump. Any help would be most appreciated.

Mike

Re: HWH Slide Mystery

Reply #1
Yahoo Message Number: 115796
Hey Mike,
Just to let you know you are not alone. I too have the same problem so I am very interested in the response that get.

Safe travels
Dennis Maloney
05 Allure #31207



Re: HWH Slide Mystery

Reply #2
Yahoo Message Number: 115797
I would trace your switched wire back to the relay and check relay operation. I can look at ours but I think there are two large wires on the pump motor. The large wire that always has 12v and the other coming out of the relay and to the motor, that is switched and activates the motor. Get a test light and find the small wire that supplies 12v to the solenoid thus activating it. When the motor operates you know it works. Test it when it fails to activate. You should always have 12v on the small wire to the solenoid when activating the switch to move the slides. If you don't the problem is in the wiring or switches that activate the system, in and out etc. If you do always have power when pressing the switches then the solenoid is bad. I would bet the solenoid is bad as they do wear out. When they wear out inside the contacts get worn and sometimes they work, sometimes they don't. Check this out and let us know. I can go look at our coach and see if I can offer more help in identifying parts.

Joe
2000 CC Allure # 30476

Re: HWH Slide Mystery

Reply #3
Yahoo Message Number: 115801
I would definitely call HWH. We've had very good luck talking to their techs...

Don Hutchins
'08 Allure 470 #31613
Don Hutchins
'08 Allure 470 #31613
40' w/tag, Cat C-9 & Cat tranny


Re: HWH Slide Mystery

Reply #5
Yahoo Message Number: 115805
I read the manual and can offer a few of my findings. One set of slides will not open when the other key is left on, you should leave the engine running with a window open, slides will not open if excessive slope light is on, should not change direction of slides, no one/extra weight should be in the slide and you should let the pump cool after 2 or 3 operations (I thought this was crazy since my 2007 magna has 4 slides).

If you are not leaving a window open, maybe your pump is overheating as it is working harder?

Brett Rabel
2007 Country Coach Magna Rembrant
Production Number 6709M


Re: HWH Slide Mystery

Reply #7
Yahoo Message Number: 115808
We recently started to have the same problem. It is intermittent. Slides may work fine many times but then fail to work. Switch on, yellow light on, press extend/retract switch and red light comes on but pump motor does not run and slide does not moved. Recycling the 12V salesman's switch will often fix the issue until it happens again.

Had shop check everything.....they could not get the problem to occur while they had the coach. Not sure they checked fluid level and I have not so will do that soon.

Gary
07 Allure 470 Siskiyou Summit #31578

Re: HWH Slide Mystery

Reply #8
Yahoo Message Number: 115812
We had similar symptoms with both of our slides. In both cases it turned out to be the "Extend/Retract" switch mounted in the little key switch panel for each respective slide. HWH part number RP90042. $10.00 for the switch and $14.99 shipping. Still cheaper than having a shop do it. When I checked continuity while operating the switch it ohm'd out OK. But in actual use the switch contact(s) would not carry the current load.

FWIW

Dave M 2002 Affinity #6103
Dave & Cathy M, 2002 Affinity #6103, 2018 GMC Acadia, Linux Mint 19.2

Re: HWH Slide Mystery

Reply #9
Yahoo Message Number: 115817
I had it happen once and pushed the HWH reset switch and all went well.

Tom
2007 Allure # 31570
'02 Silverado M&G Braking System

Tom
2007 Allure 430 Hood River Triple slide
#31570
'18 Silverado w/ M&G Braking system

Re: HWH Slide Mystery

Reply #10
Yahoo Message Number: 115818
All great tips/info sharing on HWH slides.

For those who have Power Gear electric vs HWH hydraulic slides. I will share that the Retract/Extend switches mentioned above, can have the same impact of intermittent operation on the Power Gear slides.

Our coach does not have keys involved, only the Ignition Key must be on.

We received a tip from I think it was Former CC Owner Don Seager (Could have been someone else, but Don shared his knowledge freely with all of us, and still does:)!) - that by having the rear and front switched activated back to back, sometimes get things going. (Our routine is the DW brings in the Rear slide, then I wait about 10-15 seconds, and bring the Front Slide. Sometimes the Front slide would not come in. The DW would then quickly turn on the Rear to Extend, and then stop. This would somehow magically allow me to bring in the Front Slide. She would then bring in the Rear Slide again (Even though it really had not even started to extend, before she released the switch.))

We have not had this problem for over a year now.

One more recent problem, again helped by fell CC owners. Is the Front Slide would start to come in, and then quite often stop. Usually just as it's about to finish the slight raise of the slide, to clean the fixed floor. (We call it getting over the hump.). I'd then need to wait about 10 seconds, start to Extend, then quickly stop, then Retract and it would usually come in. Sometimes I'd need to repeat this a few times. Earlier on this trip, the Front slide would continue to stop a few times while coming in. And, I could hear noises from the rear slide gear. At times, I'd go outside and help assist by pushing in on the slide, as the DW retracted it. It never left us i a codtion where I had to do manual Retraction.

Following a tips from CC owners, I did a deeper dive into the Power Gear. Removing the access panels to see the rollers and gear that are deeper in. (I had a yearly routine of cleaning and lubing the gear while the Front slide was extended. But, this was not getting in deep enough to do any good on the rollers on beside of the framed rams.) The Front slide ram/gears/wheels looked pretty good gunk and dirt wise. On our coach, this was above the Fuel Tank, so pretty well protected. The Rear slide ram opens to the bottom of the coach, in the LP Tank area, at least on our coach. Well this was embarrassingly dirty, with dirt caked on the ram/gears/wheels. I spayed both off well with a brake cleaner can I always carry. Waited for ti to dry, and on the rear, repeated it again. Then I used the recommend lubricant to spray well. Ran the slides in/out a few times (With no problems.). I also then went inside the coach, and lifted the edge of the carpet part on the slide, with the slide extended. And cleaned and then sprayed with Silicone Lubricant the white nylon bump strip (Which is the 'hump' the slide first must climb up over to come in.)

In February, we'd been in several days of blowing dusty Arizona sand storms - with both slides out. The rear part ram/arm of the Front slide, being opened from below in the LP tank area - took the worse of this...

And, I'd never heard about cleaning the nylon bump strip. Which had some areas of junk, and even a few places with a certain dawg that travels with us, hair build up.

So, I've now added a different more thorough annual cleaning an maintenance of the Front slide Power Gear. (Which is all electric motor driven.)

Long winded as always, but hope it helps someone researching problems in the future.

Best to all,
Smitty
04 Allure 31017
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)