dougrainer
Carrolton, Texas
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Joined: 06/11/2007
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427435 wrote:dougrainer wrote:Mississippi wrote:Put a little transmission fluid on a rag and rub the jack down with it fully extended.
This always makes me laugh. When retracted, the RAM is immersed in ATF  You have a defective inner seal and the ONLY fix is to replace the cylinder with a rebuilt or new. You can do as others state and constantly clean and wipe and spray the exposed ram tube but that is NOT fixing the problem and who wants to constantly crawl underneath to do that???? Doug
I don't agree. It is a "one-way" ram. The part you see, when the jack is extended, never sees oil unless the seal at the top of the ram is leaking.
What I think happens is that the seal at the bottom of the cylinder that is supposed to wipe the dust and water off the ram, when it retracts, dries out (no oil on it, remember) and grips the ram too tightly.
When the BOTTOM seal leaks, ATF flows out around the silver ram. WHERE does that ATF come from?????? You are correct tho, I should not have stated IMMERSED. There is always ATF flowing around the silver piston and that does the same thing as wiping any lubricant when extended. Doug
This is the response from HWH. Doug
"When the jack is retracted it is sitting in oil. When the cylinder is extending there is a wiper seal on the inside that wipes the oil off the cylinder as it extends, and obviously there is a wiper ring on the outside to keep dirt from getting into the cylinder when retracting the cylinder"
So, as you can see the HWH jack does its OWN wipe down with ATF each time it is extended. Doug
* This post was
edited 04/11/12 07:33am by dougrainer *
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dadd45
northeast NEBR USA
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Joined: 06/21/2004
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A question comes to mind while on this subject....how many of the people here who have trouble with jacks not retracting store their coaches with the jacks down thereby putting pressure on the springs causing stretching and loss of retraction power??
DadD45
2004 Cross Country Coachmen
2001 Wrangler behind
JUST HAVIN' FUN!!!
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Larry Cohen
Mobile, AL
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Not I....I'm in an air conditioned garage and they stay up
2006 Mountain Aire 43
Short haired wife, long haired daschund and 3 sugar gliders are co-pilots, along with Garmin Nuvi 855
05 Honda Pilot with Air Force One supplemental brake
Blue Ox Aventa II towbar
Whirlpool Residential Fridge !!!
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Pirate
Appalachia
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I had one jack, the left front, that would always take forever to come back up, but ONLY when it was warm. I never did replace that jack, I just learned to NOT put it down until I was sure of the spot I wanted to camp at, otherwise, I had to crawl underneath and pry it back up. Worked fine otherwise.
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horner
Woodstock, NY
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I had the same problem and replacing the spring solved it.
2006 Coachmen Aurora 35'
Mastertow Dolly
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SoakedKarma
Reno neh-va-duh
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I lube mine. Had one 21 year old spring break a couple of years back and what a bear it was to install new spring set..
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Pirate
Appalachia
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New springs did not solve my problem. When I store my RV for extended periods, I put 6x6 blocks under the jacks so they only have to go down a few inches before they do their jobs.
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Pangaea Ron
Anacortes, WA, USA
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So it finally quit raining and I crawled under the MH to clean the HWH cylinders. I used ATF to wipe down and removed quite a bit of dirt, especially near the upper seal. I did this a couple of times and cycled the levelers up and down each time. What a huge difference, it reduced the time from ~10 minutes to less than 2 minutes, and is much quieter.
2008 Itasca SunCruiser 35L
2000 Jeep Grand Cherokee Laredo
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jheppner
Scotch Creek, B.C. Canada
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When we had trouble with our jacks retracting slowly on our 2005 Dutch Star, our dealer said to clean off the jack cylinders with white gas and then rub vaseline on them. Works slick! We've been doing this ever since. Apparently when you're down in the Arizona/California area where its sandy and blowing the sand gets stuck to the cylinders and gums them up.
Joanne
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dougrainer
Carrolton, Texas
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jheppner wrote:When we had trouble with our jacks retracting slowly on our 2005 Dutch Star, our dealer said to clean off the jack cylinders with white gas and then rub vaseline on them. Works slick! We've been doing this ever since. Apparently when you're down in the Arizona/California area where its sandy and blowing the sand gets stuck to the cylinders and gums them up.
Joanne
I do NOT get it. When the jacks do this, they are NOT operating correctly. You are NOT fixing the problem, you are just creating more work. READ this current post. Doug http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26009304.cfm
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