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Old 09-06-2016, 07:44 AM   #1
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HWH Leveler Question

Have a 2005 Dutch Star with HWH hydraulic levelers. The levelers turn on, it will dump my air, but as soon as I push the button to deploy the levelers, it shuts itself off. Will turn right back on but will not deploy.

I looked at the book and I think it may be a bad ground? Any advice or comments about finding the ground or if it could be something else.

Thanks for your help in advance.

Dan
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Old 09-06-2016, 08:02 AM   #2
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Is this something that used to work, or a new system to you?
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Old 09-06-2016, 09:17 AM   #3
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That's what mine was doing with a bad ground.
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Old 09-06-2016, 09:38 AM   #4
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Welcome to iRV2.

Do you know the system model number for your HWH levelers?
Do you have an owners manual for it ?

I had a similar issue , the control pad would light up but nothing would operate.
Problem traced back to a bad main power fuse ; a 40 amp in-line fuse about a foot from the system's motor and control relay. I've also heard of this same problem on a HWH 625 series. Picture below.
The HWH systems main grounds go through a mount stud on the base of the pump/reservoir assembly , there will be about 7 wires attached there.
I've also had an issue with internal grounding in the pump motor it's self, I detailed my repair and will post a link to the thread.
The fuse in the photo was still passing power , but not enough to operate the system.
EDIT: I got back in time to add to this post.
HWH Pump motor failure
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Old 09-06-2016, 10:34 AM   #5
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There is a guy on this site that works for or used to work for HWH - run a search on AZPete and give him a call. He has helped several of us with the HWH system.
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Old 09-10-2016, 06:06 AM   #6
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Update

Thanks for the suggestions. I was just working on it. It is a model AP33539. It is the original unit and it has worked great for the last 4 years I have owned it and just started this middle of the summer.

I found all the grounds, took them off and put them back on, tightened down. Did not find any loose connections or corrosion. To be clear, the unit seems to turn on, all the lights come on both on the pad and in the control panel under the hood. When I push the button to extend the leveling pads, the motor sounds like it is going to work, makes the hydraulic motor sound for about half a second, then shuts the system down.

I will search for the other guy who was suggested but wanted to update you who have responded already.

Thanks again for your help and suggestions.

Dan
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Old 09-10-2016, 10:05 AM   #7
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Dan , the number you posted ( AP33539) sounds like a jack part number.
Your HWH series number would be three digits ( 625 )?
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Old 09-10-2016, 11:28 AM   #8
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You are correct, that must be the board part

The jacks are a 325 series I believe.
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Old 09-12-2016, 04:11 PM   #9
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On mine if I push the auto level button, it first dumps the air then after a brief pause, extends the jacks. Pushing the auto level twice will interrupt the process.
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Old 09-13-2016, 05:44 AM   #10
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Did you locate the pump? Check the solenoid that turns on the pump. Now I am assuming your system hydraulic
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Old 09-13-2016, 05:52 AM   #11
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Just had the same issue with my HWH levelers. According to HWH, it was a dirty ground causing the problem. My repair shop clean the battery and HWH grounds but the problem reoccurred. Final solution was to run a #4 battery cable from the generator negative post to the HWH pump ground. Working fine now.
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Old 09-13-2016, 07:41 AM   #12
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Get a voltmeter and a helper or real long test leads.

Locate the power connections for pump motor and measure the voltage at the pump.

Also locate other power connections as well as the negative leads for things.

For the pump motor find a shiny spot on the unit or look to see if it has 2 wires.

Often the pump is mounted to a metal mount that is bolted to the frame and if it was paint to paint the ground is via the bolts that over time the connection is lost.

Better installation has a ground cable attached directly to the pump motor and a shiny spot on the frame.

If issue is a bad ground the "hot" wire usually looks fantastic and stays at 12 volts even with a high load.

The ground side of say the pump motor "comes up" meaning it indicates a voltage.

What happens is the power is applied to the hot side but with out the ground side that voltage stays good.

If the ground is not good then it follows the hot side and comes up too.

When you have voltage based controls then things can get real stupid real fast by the unexpected voltages caused by the elevated ground.

Search checking connections for more help regarding checking voltage across connections to troubleshoot such things.
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Old 09-13-2016, 09:25 AM   #13
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it does sound like a bad ground. or at least a bad connection.the system is grounded thru the two bolts that hold the pump to the tray or mounting bracket. oil leaks, or just age deteriorate the connections. if you want, run a # 4 or 2 cable from the ground stud on the side of the pump body to the frame.
if that connection is good, check the 12 volt cable from the battery to the master relay. corrosion on that will cause the same symptoms. it always good to download a service manual from our website. the operators manual doesnt
cover repairs.
if you need help, please call me at 602-549-3638. thanks, paul maddox
i work for hwh. i also live in arizona, and am on pacific time until the time change.
i do not sell parts or solicit service on this forum.
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Old 09-13-2016, 01:32 PM   #14
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Hey Paul...you provide a much needed and much appreciated service on this board. Thanks so much for contributing!!
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