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Old 07-10-2013, 09:13 AM   #1
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Sticky leveling jack

I have a manual HWH leveling jack system on my rig. The right front jack doesn't like to retract on it's own. The other three retract just fine.

So far, I have had the jack lubricated, changed the springs, and flushed the fluid in the whole system. The jack does not appear to be bent or have any pits in it. It doesn't always stick, but it usually does. It will retract under the weight of the coach, then stop once the coach is fully on it's suspension. After that, I have to pry it up until fully retracted. I really didn't want to have to replace the entire jack, but it seems like I don't have much other choice.

Any other suggestions before I embark on attempting that?
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Old 07-10-2013, 12:07 PM   #2
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For an erratic problem , I would be tempted to swap the fluid control solenoid on the pressure manifold to another circuit . Just to see if the problem follows the solenoid rather than stays with the jack.
Do you have the full manuals for your system ?
HWH, offers them as a free download from their web site.
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Old 07-11-2013, 09:36 PM   #3
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I have the same problem same jack, was using 6 ton jack to see if I could free it up no luck, had to change the left front couple years ago, ordered from HWH and cost about $325, will be ordering in AM.
When you remove jack only loosen the four bolts on plates each side of pivot point. you can remove the bottom four but only loosen the top four or you will have fun getting them back through holes and plates.
Most likely the seals inside have twisted and piston movement just makes them worst.
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Old 07-12-2013, 05:46 AM   #4
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Is cylinder rehab not an economical solution?
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Old 07-12-2013, 04:10 PM   #5
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Cost the same as new one or rehab from HWH.
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Old 07-13-2013, 06:15 PM   #6
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That is about your only option to replace that jack.I have had three like that at different times and was the solution.
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Old 07-15-2013, 08:06 AM   #7
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Thanks for the replies. For now I think I will have to continue to pry it up. Replacement is a little out of the budget at the moment. Got more pressing issues to fix first.
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Old 07-15-2013, 09:29 AM   #8
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I have a left rear that will be contrary from time to time. I picked up a cheap scissor jack to use to get it back up.
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Old 07-16-2013, 02:01 AM   #9
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Thanks for the replies. For now I think I will have to continue to pry it up. Replacement is a little out of the budget at the moment. Got more pressing issues to fix first.
if switching the hydraulic solenoid valves didn't help,
i would check with a hydraulic cylinder repair shop. sometimes the orings turn and stick to the cylinder shaft and can be replaced by a knowledgeable shop.
ims there is info about this process in the archives of this forum.
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Old 07-16-2013, 02:02 PM   #10
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If you can pry it up I would think it's a sticking seal issue. I had that problem on my last coach. I tried a few different lubricants and what seemed to work the best was WD40. I would put the jacks down, spray WD40 all over the shafts and wipe them clean, reapply WD40 and retract them wet, they always retracted fully after that. Every few months I would to do it again and never had another sticking jack.
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Old 07-16-2013, 05:41 PM   #11
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HWH jacks of the era for your coach can have the lower jack seal collapse onto the cylinder. While cleaning and spraying may help, the only long term fix is to have the jack rebuilt or replaced.

I carry a long 60" bar to provide encouragement to any jacks that will not retract. So far I replaced two and am having to encourage the other two to raise all the way.
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Old 07-19-2013, 11:51 AM   #12
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Is cylinder rehab not an economical solution?
Awhile back I had a coach with HWH jacks that where sticking, pulled one and took it to a couple of Hyd shops I deal with. They can't be rebuilt at the local level(If memory serves me corectly the bottom of the outer cylinder has a crimp in it), ended up getting replacements from HWH.
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Old 07-19-2013, 08:44 PM   #13
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Originally Posted by GaryKD View Post
HWH jacks of the era for your coach can have the lower jack seal collapse onto the cylinder. While cleaning and spraying may help, the only long term fix is to have the jack rebuilt or replaced.

I carry a long 60" bar to provide encouragement to any jacks that will not retract. So far I replaced two and am having to encourage the other two to raise all the way.
Oh, I see my problem. I only have a 48" pry bar.
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Old 10-26-2014, 07:54 PM   #14
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Because I just had my two rear jacks rebuilt (Aug 2014) I thought I would try to correct some of the replies to the original post regarding a "sticky" hydraulic jack. Both of my rear jacks refused to retract without a lot of help when the ambient temperature went above 50 deg. After many opinions from various sources I called HWH. They told me this sounded unusual and recommended having the jacks rebuilt. They quoted me a price of over $400.00 for new jacks and a rebuild job of a maximum of $278.00 each. I removed the jacks and sent them to HWH. Shipping was $30.00. Within 5 days I had the jacks back. I was charged $119.00 each for the rebuild. I wish I would have called HWH much sooner and not had to be concerned with not being able to move the motorhome because a jack was stuck in the down position. The service person I spoke with said it would be very unusual to have a bent shaft and they had never seen a bent one. Although IRV2 is a very good source of information sometimes you can save yourself a lot or grief by contacting the mfg. I have a 2002 Adventurer.
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