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Old 10-06-2014, 10:53 AM   #1
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How do your leveling jacks come down?

When you are retracting your jacks how do they come down? Do they come down smoothly in a controlled manner or do they just drop?
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Old 10-06-2014, 11:25 AM   #2
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Gordon, i don't quite know how to put this. My jacks don't come down at all when they're retracting.

;-)
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Old 10-06-2014, 11:32 AM   #3
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Sounds like you have air in the system. Close everything (All hydraulic cylinders retracted) and check your hydraulic fluid level. If low, fill with spec fluid (It could be hydraulic oil, it could be ATF, check to be sure.) then run everything through full cycles. Levelers to the ground and back, slides, if hydraulic, out and back. That tends to purge air out.

If the fluid level is fine and it's been doing this for awhile it may be airlocked, then I'd call a hydraulic specialist to help get the air out of the system.

Cylinders have a certain amount of stick in general, the air acts as a cushion. That cushion finally compresses enough to move the cylinder and here it comes! With no air in the system it all moves smoothly.
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Old 10-06-2014, 12:15 PM   #4
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When I EXTEND my jacks, the move down at the speed the hydraulic fluid pumps them. When I RETRACT my jacks, they move up at the speed the hydraulic fluid pumps them. Slow down, slow up.
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Old 10-06-2014, 12:44 PM   #5
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The ones on my Thor are quite jerky when retracting.
They make a pretty God awful sound too.
But I'd take that sound over the back and forth with leveling blocks any day.
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Old 10-06-2014, 01:06 PM   #6
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You don't say what you have, so it's hard to give you an answer that may help, but my Winnie Adventurer has an HWH hydraulic jack system. The jacks extend b by being pumped down against the force of the springs on the sides of the jack. If there was binding in the jack piston shaft, it might look jerky, but mine doesn't act that way. Retract is by spring power, as hydraulic fluid is forced out of the jack. Dirty seals or shaft can cause sticking, which can give a jerky retract.
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Old 10-06-2014, 02:29 PM   #7
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Need more information - the make of the coach is nice but the make of the jacks is what is important. Sometimes more than one brand is used by an RV manufacturer. Additionally, most (quantifier as their may be some that differ) smooth operation up (retract) and down (extend) is the norm. A jerk in one or two maybe indicative of each needing some cleaning and light - emphasize light coat of silicon spray maybe needed. My owners manual states to check them for cleanness, exercise regularly and really check and clean if near salt water (Lippert)
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Old 10-06-2014, 02:38 PM   #8
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Sorry - should have read my post more carefully.

The jacks extend and level the coach quite well. Had some issues but the dealership fixed that. They found when the jacks were retracting the coach shuddered as the pressure was released. The dealership has been working on them.

This morning the air bags filled and then the jacks released dropping the coach quite rapidly. Should it be that way - I think the coach should drop in a controlled manner.

Coach is a 2015 Tour. Jacks are Lippert.

Thanks for your help.
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Old 10-06-2014, 02:43 PM   #9
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Quote:
Originally Posted by JFXG View Post
Gordon, i don't quite know how to put this. My jacks don't come down at all when they're retracting.

;-)
Good one - it appears mine work the same as yours. LOL
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Old 10-06-2014, 03:14 PM   #10
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I have the LIPPERT system and when I press retract. They drop the coach very fast, like roller coaster fast.
It could be my imagination but I believe if I raise it just little to prime it first then press retract. The coach seems to lower in a more controlled manor.
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Old 10-06-2014, 03:19 PM   #11
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How do your leveling jacks come down?

Quote:
Originally Posted by Gordon Dewald View Post
.......The jacks extend and level the coach quite well.........This morning the air bags filled and then the jacks released dropping the coach quite rapidly. Should it be that way - I think the coach should drop in a controlled manner.........Thanks for your help.

I have an HWH system. Mine retract pretty smoothly as long as they're just lightly loaded-- just stabilizers, if you will. But if I've had to lift any substantial weight with any 1 or pair of jacks to level on uneven ground, then on retraction it will often get sort of jerky as the system lowers the coach under several thousand pounds of pressure, with each jack having to lower a different amount and release a different quantity of fluid, and the suspension having to readjust to the added weight. But I always thought that was normal.
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Old 10-06-2014, 04:25 PM   #12
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Quote:
Originally Posted by JFXG View Post
Gordon, i don't quite know how to put this. My jacks don't come down at all when they're retracting.

;-)

So you are smart enough to understand his question but just wanted to poke fun at his wording of it. That's helpful
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Old 10-06-2014, 05:51 PM   #13
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I have a Lippert 3 point jack system. They extend slowly almost one @ a time and do good after that. it can jerk a bit while leveling. When I press retract it drops like a stone until the weight is off and retracts slowly after that, it sometime makes scary noises (moans, groans, creaks, occasional clunks etc.) which I have come to ignore as all the jacks do it (I have had electric and HYD previously same noises) especially if you are on any kind of slope.

PS I am on my 6th Lippert motor/manifold due to motor failures, 2 cracked reservoirs. By the way has anyone found a replacement motor for lippert? They do not sell the motors and manifold separately, My garage and I have come to the conclusion that the motor is underpowered and cheaply made. Thank god I took the extended warranty when I bought it. HR Neptune 2009 35SBD

Mike B
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Old 10-06-2014, 07:28 PM   #14
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I air up before raising the jacks (Lippert) as per Monaco procedures. It is pretty smooth without any excessive noise or jerking. With about 80# of air in the bags the jacks retract without the coach dropping. You might try airing up a little before you hit the retract button.
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