Slide creeps out

[Gottahaveit]

We have hydraulic slides and one of our bedroom slides creeps out after a few days or so while in storage about 3 inches. Nothing appears to be leaking as far a a seal etc. What do I look for now ?

[dougrainer]

fpresto wrote:

wolfe10 wrote:
Many of us interpret this as "hold until you hear the pump start to load up". Don't see anything positive by pressurizing past that point.

Well Bert I don't know who many of us are so all I can do is what HWH says. The following is right out of the HWH 725 Operator's Manual : To extend the room, press and hold the ROOM CONTROL in the "EXTEND" position until the room is fully extended or stops moving. Continue to hold the control to "EXTEND" three or four seconds. This assures full pressurization of the cylinders. IMPORTANT: Do not hold the extend switch more than 10 seconds.
It says the same under the retract section.
I do know that if the cylinders are not fully pressurized you can get creep of the slides.

While the HWH manual states that, the HWH slide rooms ALWAYS have pressure whether extended or retracted. It is NOT to PRESSURIZE the system MORE. It is to verify that the rooms are fully retracted and extended at the stop points. But, yes, always hold the button for a few seconds after full retraction or extension. IF a slide room creeps and NO visible leaks, the odds are 99% of the time one of the 2 solenoids are leaking internally. Rare for a HWH cylinder to leak internally(that 1%). Doug

[fpresto]

wolfe10 wrote:
Many of us interpret this as "hold until you hear the pump start to load up". Don't see anything positive by pressurizing past that point.

Well Bert I don't know who many of us are so all I can do is what HWH says. The following is right out of the HWH 725 Operator's Manual : To extend the room, press and hold the ROOM CONTROL in the "EXTEND" position until the room is fully extended or stops moving. Continue to hold the control to "EXTEND" three or four seconds. This assures full pressurization of the cylinders. IMPORTANT: Do not hold the extend switch more than 10 seconds.
It says the same under the retract section.
I do know that if the cylinders are not fully pressurized you can get creep of the slides.

[Gottahaveit]

Thanks for your suggestions...will see what I can find when I get it out of storage for the next trip.

[wolfe10]

fpresto wrote:
A simple trick that may help and save some time and money: HWH on their web site says to hold the extend or retract button for at least 3 seconds and no more than 10 seconds after the slide stops. That is to make sure that the lines are charged. If they are not charged the slide may creep.

Many of us interpret this as "hold until you hear the pump start to load up". Don't see anything positive by pressurizing past that point.

[fpresto]

A simple trick that may help and save some time and money: HWH on their web site says to hold the extend or retract button for at least 3 seconds and no more than 10 seconds after the slide stops. That is to make sure that the lines are charged. If they are not charged the slide may creep.

[SidecarFlip]

NHIrish wrote:
Could also be a bypass leak in a piston....in other words, no exterior leak but the pressure leaks down internally.

The problem is figuring out the leak is...check with the system manufacturer or rv manufacturer for troubleshooting recommendations.

I found that many rv mechanics have no clue about hydraulics, so find a good independent!

My personal observation would be to take it to a agricultral implement dealer. They know hydraulics, they deal with them everyday and hydraulics are hydraulics whether it's a motor home or a dump truck or a hydraulically actuated farm implement. All the same principles at work

[NHIrish]

Could also be a bypass leak in a piston....in other words, no exterior leak but the pressure leaks down internally.

The problem is figuring out the leak is...check with the system manufacturer or rv manufacturer for troubleshooting recommendations.

I found that many rv mechanics have no clue about hydraulics, so find a good independent!

[Jim]

I have the HWH hydraulic slides, Living Room and Bedroom and the BR slide did the same thing to me.

Brought it into Winnebago factory service just a couple days ago and they changed out 2 hydraulic solenoids to fix that problem, telling me that's what was needed to fix it. I'd heard the same thing from others here on the forum...that 2 solenoids had to be replaced.

Cost was $172 each for the solenoids and 1.7 hours labor for $221. So total of $565.

The Winnebago P/N 131306-12-702 just in case you need it. The manufacturer of your slide system would have there own P/N I'm sure and it would likely be different.

[rk911]

check your owner’s manual. on our previous gas MH they were up front in the engine compartment.

[Gottahaveit]

Where will I find the solonoid valve? I have read alot and I do think that is the issue.

[SidecarFlip]

While I don't have a motorhome, I deal with hydraulics every day here on the farm. Sounds to me like you have a 'leakdown' issue. Either a faulty (leaking valve) or you have entrained air in the system. Both will cause cylinder creep.

Do you have a way to physically lock the slide in?

[rk911]

fsulty solonoid valve.