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Old 04-30-2013, 09:01 AM   #1
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HWH Jacks not working

I have a 1991 Southwind p30 chassis. My jacks were working a couple weeks ago and just a few minutes ago I was trying to jack and got the two rear down and then the solenoid just started clicking. I have got 13 volt to the pump through the solenoid. What's the problem here?
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Old 04-30-2013, 09:23 AM   #2
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13 volt do not give you a good battery load reading, if you are using a volt meter. you need to measure the amps. it takes 105 amps to start and run a pump motor at the proper rpm. try starting your engine and run the jacks. the alternator will supply enough amps. if that doesnt work, check all your grounds. download a service manual for your system at hwh.com. it will walk you thru the diagnosis.
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Old 04-30-2013, 09:23 AM   #3
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I have owned 4 coaches with HWH jacks. Any time I have had problems like you describe it turned out to be a low voltage problem. It could be a bad ground or bad cable. Put your voltage meter on the main lead to the motor and check it while it is clicking. I suspect you will find your voltage will jump back and forth. Was you engine running when you had the problem? If not try that approach. If all else fails give HWH a call at 800-321-3494 and get their suggestions. They have been very helpful when I have called them. Good luck and I encourage you post the solution to your problem as we all learn from each other.

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Old 04-30-2013, 09:36 AM   #4
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Starting the engine nothing for it
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Old 04-30-2013, 09:50 AM   #5
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actually, for most manufacturers, hwh systems operate off the engine battery. if you run your system in accessory, or with just the key on, and your battery is near marginal, you sometimes will not get the 105 amps needed to run the pump motor at proper speed. with the engine running, the alternator assures that you are getting adequate amperage.
yes you can run your jacks and rooms without running the engine, but you assure proper amperage when you do have the engine running.
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Old 04-30-2013, 10:23 AM   #6
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I checked the amps and it was 6 amps with the engine running and 13 volts
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Old 04-30-2013, 10:42 AM   #7
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I don't now if this will be any help, but , when I had trouble with my HWH system it traced back to a corroded fuse holder. An in-line 40 amp fuse, near the pump, the fuse cover was no longer water tight, and the corrosion stopped the power.
Before I found and fixed the problem, the only way to work the levelers was to supply the system with power via jumper cables from the toad.
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Old 04-30-2013, 01:20 PM   #8
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I checked out the fuse holder it was fine and no corrosion. The only thing is, it is a 10 amp fuse. Like I said earlier, it has been working fine up until now. I have also pulled all the grounds off and everything was fine there.
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Old 04-30-2013, 05:08 PM   #9
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the 105 amps i was referring to is when the jack extend is activated. that the only to load test the pump motor . sorry if i was unclear.
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Old 04-30-2013, 05:18 PM   #10
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the inline fuse near the motor in a #10 blue wire should be 40 amps.
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Old 05-02-2013, 07:03 AM   #11
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Thanks for all the input guys. The problem ended up being the stainless steel ground stud going up through the frame into the bottom of the pump. It looked fine the first time I took it out, but after taking the motor apart and cleaning corrosion from behind the brushes backing plate and emory cloth to the armature shaft, lubing the shaft bearing it still didn't work. It would spin while being energized with a battery charger but not the chassis battery. Pulled the stud out again and ran a tap up into the threads put it back together and Bingo!! it works
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Old 05-02-2013, 08:47 AM   #12
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Good job!
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Old 05-03-2013, 09:16 AM   #13
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thank you for posting what you found and repaired. . lots of guys post about their problems, but not many post the fix.
that helps others who have similar problems. we all learn something when this happens thanks again
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Old 05-05-2013, 02:05 PM   #14
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Is there a solution for Power Gear jacks....short of replacement?
I made 5" tall pads, it takes away excessive travel and distributes the weight but the jacks won't level the coach and they freak out the control pad. With each use I need to to 'reset' the system and play games to get the jacks to retract.
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