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Old 07-21-2014, 08:37 PM   #15
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All, I just learned something new about smart bed creep which I will confirm with HWH tomorrow or so (waiting on a call back). After having no creep issues for about two years now, this week-end my #4 smart bed (front PS) repeatedly moved out about 4 - 6 inches in about 30 minutes. Since I don't have the pressure gauge and fittings to do a test to see if the problem is isolated to a leaky cylinder extend solenoid valve or a piston leak in the smart bed hydraulic cylinder buried under the basement floor boards (see HWH ML42737/MI15.8330 07UG09), I was already to replace the "extend" solenoid for this particular smart bed (#2E on the HWH MI15.9502 01APR04 "Room Extension Solenoid Valve Replacement" Instruction Sheet schematic) when I decided to try something that HWH supervisor "Lon" did when he had his technician replace this same solenoid in 2011 at the HWH factory. All I did was run the smart bed out it's full length with about a 2-to-3 second hold at it max extension, run it back all the way in, again a 2-to-3 second hold, and repeated this process one more time. My smart bed creep problem disappeared. My guess is that either this little exercise either dislodged something in the solenoid valve seat preventing a full seal which is essential or I had some air bubbles in the line from frequent partial extends and retracts or just had not achieved proper pressurization of the cylinders due to the many partial extends and retracts of the smart bed. The only place I could find any HWH instructions about this fully extend, fully extract process was in a very old HWH brochure (MP35.6042 18SEP03). Hope the above info is useful. It saved me about 4 hours of solenoid valve replacement time which may not have fixed the problem. ray
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Old 07-22-2014, 02:45 AM   #16
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I have also tried this for the one SB which creeps out for mine. It seems to work for a while then it goes back to it's sneak out ways. Next time I am up at the coach I will try this again to see if it works. I also should check my fluid level.
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Old 07-23-2014, 12:02 AM   #17
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Old RV'er: Let me know if it works. Still waiting to hear from HWH because if regular full extends / retracts are good for the smart beds, I'd like to make that a routine maintenance item. My room slide-outs get that kind of exercise with virtually each use and I've only had one inward (retract) creep and one outward (extend) creep on room slides in my 16-year history of owning Alpines. BTW, I've had excellent support from HWH in the past. The solenoid port plug assembly kit (#RAP92949) recommended by Engineer Mike, plus the small solenoid o-ring kit and valve removal tool recommended by HWH's Randy in Tech Service have saved me some solenoid removal and replacement time and expense, e.g., using spare solenoids and plugs in the manifold and once, a nicked o-ring was the source of a leaking solenoid problem.
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