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Old 09-25-2017, 03:50 PM   #1
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Join Date: Jun 2011
Posts: 34
Jacks won't lift rv

I have 3 Rva jacks on my 1998 diplomat
Only 1 jack will lift
When I press buttons for the other 2 you can hear the motor run
But jacks won't lift the rv
Any ideas
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Old 09-25-2017, 04:38 PM   #2
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Good afternoon Uksteve; A couple of questions. Have you checked the fluid level in the tank for the jacks to see if it is at the proper level? Have the jacks performed like they should in the past? If everything has worked before, I would check fluid level. If only one jack works and the others don't, you might need to check the solenoids on the manifold that goes to each jack to see if is has power and is operating. The motor and pump may be working but if the solenoid is not opening, no fluid will get to the jack. I would also try opening and closing the T handle on top of the manifold to see that they are seated and not letting the fluid by pass. If you have the owners manual for your Diplomat, should be a section in there covering the jack. As a last resort you could contact RVA. I have read other posts that they are good at helping owners with problems with their jacks. Sorry, I do not have their contact info but should be easy to get. Let us know what solves the problem. Good luck!
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Old 09-26-2017, 01:45 AM   #3
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Jacks won't lift

I have tried topping up oil
Swapped good jack solonoid to jack
That wouldn't lift
Still no lift on bad jacks
Motor sounds but no lift
It's starting to get frustrating
Thank will extend when I am up on my air
But that's without any weight on it
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Old 09-26-2017, 06:29 AM   #4
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Had the same problem. Turns out the hydraulic motor was weak, not putting out enough pressure. Replaced the motor and all is well.
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