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Old 04-03-2022, 07:14 PM   #1
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Jacks keep slipping

What does it mean, with a Class A DP, if your leveling jacks start slipping down? Feels and sounds like about a half inch at a time. I have made sure my leveling fluid reservoir is full. 5 year old coach, never happened before, and some days it slips once every 20 minutes or so and sound is coming only from the rear.
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Old 04-03-2022, 07:47 PM   #2
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Sound? What brand and model leveling jacks are they?
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Old 04-03-2022, 08:42 PM   #3
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Originally Posted by HarryStone View Post
Sound? What brand and model leveling jacks are they?
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Old 04-05-2022, 12:36 PM   #4
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Are they spring return jacks? Is it just popping/groaning sound or do they drop the coach as well.? Groaning sounds can be solved with Cat anti-stiction additive or motorcycle racing fork oil available in smaller size. A few of us have found the manual release handles on individual jack controls were not quite tightened down . Don't over tighten them, just by hand should be fine but hard to say with some people's hand strength/toughness or if in odd reach to get to them.
Most jack hydraulic solenoids if leaking by have rebuild kits available, some owners just located the right sized viton O-rings. You can find several posts on all things I mentioned.
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Old 04-06-2022, 12:51 PM   #5
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Put some strips of tape on the back of the coach and measure to the ground. Determine if the jacks actually let the coach fall - often the noise is metal stress rather than actual downward movement of the coach. If your measurements show the coach actually drops each time (it would soon be off level, right?), then the problem is likely the valve in the hydraulic line leaking. Or the jack ram is failing internally. If not, some other component is stretching or straining. I had a gas chassis coach where the fuel tank was making the noise, actually sliding on its support straps.
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Old 04-06-2022, 12:57 PM   #6
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If it really is slipping, it's probably the solenoid, but it might be the jack itself. Is it lowering, or is it just making a pinging sound? Or both?
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Old 04-10-2022, 08:36 AM   #7
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If you aren't finding any pools of hydraulic fluid anywhere (on ground or in coach) and if it's one leg, then it is likely a hydraulic solenoid that is internally leaking. With the coach DOWN, open the solenoid manual release, and then close it. Test. If that doesn't work, then replace the solenoid for the leg that is dropping.
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