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Old 09-04-2014, 10:30 PM   #1
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HWH jacks won't retract or extend

On our last trip went to retract the jacks and none of them would come up. Opened the valve on each of the 4 solenoid sand they all retracted fine. Closed the valves and then tried to extend them, could here the pump running but none of the jack moved at all. Shut the system down, waited a bit and tried again, same issue could here the pump but no jacks moved. Both slides still work perfectly fine.

This is on a 2004 Itasca Suncruiser 33v

Have tried HWH, no response in over 6 weeks to my emails and can't through to a tech on the tech line.

Any ideas would be appreciated
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Old 09-04-2014, 11:32 PM   #2
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Absolutely guarantted no power to solenoids. Only thing possible that would keep them from coming up when it was all 4 jacks. When you opened the valve you manually released the pressure the solenoids would have released automatically. When you got them up no power to the solenoids so they could not let hydraulic fluid go to the jacks. I believe there are fuses on the control board in front of the solenoids. I am not positive of that because I have never worked on them but I would start looking for a blown fuse first. Get the model of your leveling system and then google HWH (your model number) fuse locations.
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Old 09-06-2014, 06:13 PM   #3
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Have pulled and checked all fuses in the control box and all are okay, unplugged one of the solenoids and had someone press the extend button that would activate that solenoid and you are right there is no power to the plug feeding that solenoid. So not sure what else other than a bad control board would cause no power to be send to any of the 4 solenoids, It worked fine and 2 days later when we went to leave nothing.
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Old 09-06-2014, 06:47 PM   #4
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Originally Posted by CdnCruiser View Post
Have pulled and checked all fuses in the control box and all are okay, unplugged one of the solenoids and had someone press the extend button that would activate that solenoid and you are right there is no power to the plug feeding that solenoid. So not sure what else other than a bad control board would cause no power to be send to any of the 4 solenoids, It worked fine and 2 days later when we went to leave nothing.
Do you have any troubleshoot literature? Here is the link if you need it.

http://www.hwhcorp.com/ml23934.pdf
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Old 09-06-2014, 09:34 PM   #5
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Quote:
Originally Posted by CdnCruiser View Post
Have pulled and checked all fuses in the control box and all are okay, unplugged one of the solenoids and had someone press the extend button that would activate that solenoid and you are right there is no power to the plug feeding that solenoid. So not sure what else other than a bad control board would cause no power to be send to any of the 4 solenoids, It worked fine and 2 days later when we went to leave nothing.
Try to follow wire color from solenoid's exciter post back to the controller; then see if that wire gets power when you press the switch. If not, by-pass that wire by hot-wiring to the exciter post and see if the motor does it's thing.
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Old 09-07-2014, 12:22 AM   #6
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Have you checked for power into the control board. If it does not have incoming power you wont get it to the solenoid.
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Old 09-07-2014, 01:05 AM   #7
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Troubleshooting jack retraction

Let me toss in my favorite, stuck shuttle valve. If slides go in/out then there is power to the control board. Get the system manual and look at LEDs on control board, when power is applied to each solenoid you will see led light. see this link, HWH Repair Sheets Also solenoid will get hot, too hot to touch,(poor design, IMHO) if problem isn't in the wire harness/ground. The Shuttle valve is only in jack loop. When you try to extend jack you should hear pump going, lower sound volume then when under pressure extending jacks, about like when extending slides. Means relief valve opening, putting ATF back into tank. There is a troubleshooting procedure for solenoid valve/shuttle valve problems http://hwhcorp.com/mi158813.pdf
The shuttle valve design is not robust (IMPO) and is easily jammed by a little piece of foreign material. I think it could be washed out with DEX III and reused if there is no physical damage, but HWH says to replace it if the pin is stuck. Cost is about $160 for a replacement if you need it, and it takes a 7/8 wrench to remove it. Replacement comes with necessary O-rings and backing rings as well as flare fitting at the top. Took me about a hour from start to finish to replace ours, but HWH says it is a 15 minute job. Only real tricky part is alignment of the two elbows for the U-tube during restoration (see *.pdf referenced above). O-rings are easily damaged and can introduce foreign material into the HWH system when shuttle valve or solenoids are replaced (again IMPO) which can show up long after the replacement job.
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Old 09-07-2014, 07:16 AM   #8
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Jacks

I think you have the same chassis I have, so if you have the kwikee control my problem may help. I had pretty much same symptoms, found someone on Internet who said to remove the control switch at the dash on driver side (4 screws on mine) and push the reset bottom on back for a couple seconds. Worked like a champ, saved bucks and let us get on our way quickly. Good luck
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Old 09-07-2014, 11:07 AM   #9
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On ours there are inline fuses on in the pump harness. If 1 of the fuses blows the pump will run but no jacks will move.
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