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Old 05-29-2012, 08:48 PM   #1
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RR HWH jack not extending

Re: HWH 325 series
Yesterday, May 28, went out to check all systems 2 weeks prior to departure on a 2500 mile trip and found that my RR jack will not extend. When I first turned on the key, all "jack down" lights were on. Hit the "store" botton and all lights went out. Pressed the extend bottons and 3 jacks went down and 3 lights came on. The RR jack did not work. Unplugged and replugged all the wires to each solinoid. Re tried jacks but still not working. Now the red RR "jack down" light is on and stays on but the jack is still retracted.

If have an email and a call in to HWH for guidance but from passed experience, I have found that this time of year they get backed up with phone calls.

Anyone here have any suggestions on how to proceed with troubleshooting?

Thanks
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Old 05-31-2012, 06:19 AM   #2
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See if there is a pin looking device on the jack it is a switch it could have gone bad you can jumper wire it to check if the jack starts working then that would be the issue, they can become dirty over time also if you get it down popping the switch meaning push it in then release would get dirt out
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Old 05-31-2012, 07:28 AM   #3
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HWH are hydraulic, ours do not have locking pins, the springs keep itin place. what the OP should do is eliminates potential pieces of the system. Like swapping solenoids if that is possible. If three jacks go down, most of the system is working.
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Old 05-31-2012, 08:55 AM   #4
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Check your hydraulic fluid reservoir and make sure it isn't low.
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Old 06-02-2012, 09:11 AM   #5
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Jacks are all working now.

The good news is that it was just a fuse.

The bad news is that it was just a fuse. Why did it blow? Maybe I'll never have to find out.

Thanks for your responses.
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Old 06-03-2012, 12:00 PM   #6
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HWH Jack Not Extending

I have the same issue with my Left Rear Jack not extending. The balance of the jacks funstion properly. Where is the fuse block located for HWH Leveling Jack Systems? I have been all over my 2001 Newmar Mountain Aire, but cannot ovate the fuses for the hydraulic levelers. Thanks for any help!
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Old 06-03-2012, 04:39 PM   #7
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I can only speak for my situation. My HWH pump, motor and control box is located in front of the driver and in front of the driver side wheel. The fuse is inside the control box that is mounted close to the HWH hydraulic tank. This control box has a clear plexiglass cover. The clear plexiglass cover is held in place by a black rubber "band" that is a PITA to deal with. I found it easier to remove the control box to access to fuse. Suggestion, when you do get the cover off, change all the fuses to the type that have an LED light that illuminates when the fuse is blown.
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Old 06-04-2012, 08:08 AM   #8
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I have this service manual don't know if it will help but might
Attached Files
File Type: pdf Power gear service manual.pdf (1.68 MB, 33 views)
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Old 06-05-2012, 08:28 PM   #9
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update
As I suspected, a second fuse has blown. I switched wires to couple a different jack to the RR solinoid and THAT fuse also blew out. So, I.m thinking the solinoid is bad.
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Old 06-07-2012, 09:01 AM   #10
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rottenralph, you have a bad solenoid. because of the series parallel grounding procedure used by hwh, it may be the solenoid for that jack or the corresponding solenoid for the other rear jack. when this happens, it often weakens the other rear jack solenoid. download a service manual for your system from the hwh website. if i were doing the repair myself, i have found replacing both solenoids eliminate the problem altogether. no guessing which one. call hwh. they do answer the phone. it may be the receptionist, but they will call you back.
the part number for the solenoid is RAP90729. this is the small solenoid. it can be ordered directly from hwh. if you need further assistance, my email is azpete@att.net. i can help.
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