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Old 06-02-2011, 11:26 PM   #1
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Hydraulic Jack will not go down all the way

I have a 1995 Winnebago Vectra and the jacks were working fine. Last time I lowered them, they would not go down all the way and there was some oil (fluid) shooting around its reservoir by the hoses heading to the jacks. They were brought back fine twice since it happened. Anyone with the same issue? Any HELP?

I am new to the site and was unable to locate yet posts related to my problem. Any help is welcome!

Thank you,

Allen
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Old 06-03-2011, 01:02 AM   #2
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Allen, sounds like you have a pressure leak, at the pump/resivoir, the system uses the springs on the hydraulic jacks, to return to the retracted possission. So there is no real pressure in the lines when they are retracting. You will have to clean the area around the pump and by raising one jack at a time check for leaks. Stand well clear and wear eye protection any time the pump is running. Use only the recomended fluid to fill the resivoir, add fluid only when all jacks are retracted. In the case of a line leak, most tractor repair shops carry the hose and ends in bulk and can make a new one using the old one as a model. A leak from the pump or solinoids may requir contacting the manufacturer for parts or info on a rebuild. Good luck.
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Old 06-04-2011, 08:58 AM   #3
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Skip, Thank you for your help,

I had a friend look at the lines leaving the pump while I was droping the jacks and it was obvious one of the lines had a crack on it caused by the rubbing against the support of the unit itself. The cause from what I could see was because the line was to tight (short).

I removed the hose, which happened to belong to one of the front jacks, therefore one of the longest, about 22 feet long. I took it to a hydraulic shop and they made a new line for me, about 5 inch longer than the original one (cost $127).

Removing the line and insert it back was not too hard, but a dirty job (about 20-30 minutes each way).

I now encountered a new issue. The line(s) are full of air and the jacks will not extend. Do I need to BLEED the lines? How do I do that?

Allen
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Old 06-04-2011, 10:07 AM   #4
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The bleeding of lines to remove air is necessary when the pump has a sold stop (Think brake master cylinder) for the jacks the pump runs as long as needed, if there is air in the line it will be compressed, so long as there is fluid in the tank that is.. Eventually it will work itself out.

That said.. It would not hurt.

But I wonder if your pump has lost efficiency.. I nkow mine has.
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Old 06-04-2011, 10:12 AM   #5
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I found another thread with this information about bleeding lines-----i tmay answer your question.


had my RR jack come apart and leak a couple of quarts at a stop during my maiden voyage. I was able to retract it 1/2" off the ground. I crawled under and removed and plugged the line. I just wished it was not over 100* that day. The one pain was the self locking nuts that had to be worked all the way off. Monaco sent a replacement to Branson KOA and it took about twenty minutes to install. There are 4 bolts and one hydraulic line. Just cycle the jack a couple of times to bleed it and you are all set. Also make sure they are all retracted and that nobody pushes the extend button while the line is off. Not much fluid comes out of the line when you remove it.
Good luck

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Old 06-04-2011, 10:26 AM   #6
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Alinblaj, I assume you have HWH jacks, if so, their technical support is great, they can be reached at 1 800 321 3494. They are in Iowa so gage the time zone.

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Old 06-04-2011, 12:16 PM   #7
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Quote:
Originally Posted by alinblaj View Post
Skip, Thank you for your help,

I had a friend look at the lines leaving the pump while I was droping the jacks and it was obvious one of the lines had a crack on it caused by the rubbing against the support of the unit itself. The cause from what I could see was because the line was to tight (short).

I removed the hose, which happened to belong to one of the front jacks, therefore one of the longest, about 22 feet long. I took it to a hydraulic shop and they made a new line for me, about 5 inch longer than the original one (cost $127).

Removing the line and insert it back was not too hard, but a dirty job (about 20-30 minutes each way).

I now encountered a new issue. The line(s) are full of air and the jacks will not extend. Do I need to BLEED the lines? How do I do that?

Allen
If you have HWH jacks, you can go to their website and download technical documents that you can use to identify the model number of your system. Armed with the model number, you can then download troubleshooting guides.

I seen to remember reading the jacks (at least the ones described in the document I was reading) were self-bleeding. However, it did reference a method for manual bleeding. You may want to check into that if the air doesn't work its way out of your system.
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Old 06-10-2011, 06:14 PM   #8
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You may be low on hydraulic fluid at this point. Sound like you have had several leaks. The jacks wont deploy completely with out fluid in the reservoir.
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Old 06-10-2011, 08:11 PM   #9
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Yup. That is the rocd
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