Coast Resorts Open Roads Forum: Fifth-Wheels: Suspect hydraulic pump (slides) fading


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jaycocamprs

Ringgold Georgia

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Joined: 03/28/2004

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Posted: 06/24/23 11:09am

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heyobie wrote:

Do you think that if a cylinder had an internal leak, it would eventually stop functioning because it will have oil on both sides of the piston?
If true,the system would continue to function and one of the 4 slides would not work properly.
Do you think I'm right?

With a internal leak the oil just goes back to the tank. They are double acting cylinders, oil on both sides. So the non pressure side is always open to the tank. Before you try to open them back up check and see if they are all still tight against the trailer. Ours would not hold the bedroom shut. However you may have more than one bad, since you have loss of oil.

2018 Silverado 3500 DRW
2011 Montana Mountaineer 285RLD

heyobie

Maryland

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Posted: 06/24/23 03:13pm

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The slides work and hold. No crisis yet. I lose about a quart and a half a year. It is not on the six stabilizers because I can visually see them.

I drilled holes thru the bottom of the RV at the low points to see if oil came out from the 3 main slides. Nothing. The 4th slide in the bedroom is under the bed and can be visually checked. All OK.

So my plan is to cut 3ft squares out of the under belly to examine each of the 3 jacks. I will then devise a way to reinstall so I can easily check or replace a bad jack in the future .

In the fall I added 1 gallon of oil. So I am looking for a gallon of oil an it is not apparent yet where it is hiding. That is the most surprising fact.

I will report back on my progress.

Thank you for telling me that oil is on both sides of the piston. I called Lippert and they did not tell me that.

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