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Old 06-18-2016, 11:15 AM   #1
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Join Date: May 2010
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HWH back jack problem

My back left jack not working, The jack is loose inside the housing, when i try to use the jack the presher bilds untill the presher gets to high,and the pump quits, and i need to waite for a wile to use the hydrolics. All the other jacks work fine,I tried all ways, side valves, and back valves. I will waite untill i here from anyone that has some info.

David Taylor

2000 Alpine limited 350, 38.5

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Old 06-18-2016, 11:42 AM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 11,946
My HWH jacks have a pivoting mount that allows about an inch of side to side movement at the ground contact plate. If that's what you have I'd consider that normal.
Do you have the owners manual for your leveler system?

Manuals are a free download from HWH web site, and have a troubleshooting section.

Welcome to HWH Corporation

Have you checked the fluid level in the reservoir , with all the jacks retracted?

If your only having the problem with the one jack , and trying to cycle it, leads to hydraulic lock , and the pump stopping , I'd say the jack needs replacing .

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 06-18-2016, 12:12 PM   #3
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Try the trouble shooting guide mentioned above but sounds like either the valve in the jack or the solenoid at the pump is not opening properly--ie, creates pressure build up and pump shut-down. Assume jack in question is stuck in the stored [up] position??? So what happens when you auto level the coach--do the other three jacks go down? If one jack isn't deploying, you would never get the other three past the initial leveling position. Guess what you are saying is whenever the system tries to level that jack, the pump eventually locks up. During initial auto leveling, usually two jacks deploy at the same time--so either valve at top of that jack is not allowing fluid in or solenoid for that jack on the pump manifold is not allowing fluid to pass. Think I'd would check that solenoid electrical connection or follow trouble shooting guide and manually open solenoid with the "tee-handle"--located on the end of the solenoid.....
Old Scout
2003 40' MDTS
Garden Ridge, Texas
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Old 06-19-2016, 07:02 PM   #4
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Join Date: Aug 2004
Posts: 412
David - Does your living room slide work? Do the other jacks work? Does your generator slide work? I have never had my pump stop because of too much pressure. When the slides or jacks are extended all the way the pump will keep on running rather than stall due to overpressure. If you manually depress the left side jacks does only the left front jack extend? What about the rear jacks? If rear jacks are manually depressed does only the right rear extend? Jacks operate in pairs. I am also wondering if what you are calling "over pressure" is really the HWH stopping due to it not being able to level if you only tried it in auto level mode. More information might help diagnose problem...or not.
'01 Alpine 36 FDDS
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