Yes in our Motorhome .....it never takes us out of level, just clunks every so often.....I don't worry about it but am also curious if anyone else experiences it.....

I also posted the question on another forum and someone said it may be a problem with the jacks brakes. We'll take a look at those today, and hopefully not find anything, but I am glad to hear we're not the only ones experiencing it. It can get a bit unnerving as our bedroom is directly over our landing gear.

This is a common issue with hydraulic systems.

Here is the procedure and list of fluids that you can use. I haven't done this yet, but plan to.

Lippert Level Up noise fluid
If there is a popping noise in a Lippert Leveling system, Lippert has approved adding a quart of anti-stiction
fluid. Approved fluids are listed by brand name and fluid characteristics below:
1. Torco RFF Grade 15 (Fig. 1)
2. Maxima Fork Oil Grade 15 (Fig. 2)
3. Caterpillar Hydraulic Oil Additive 1U-9891 (Fig. 3)
For maximum results in the shortest amount of time, please follow the preparation and procedure exactly
as written below. Failure to follow the preparation and procedure may result in delayed resolution of the
audible disturbance.
Preparation:
1. Obtain a clean container (large enough to hold a quart of fluid)
2. Obtain a fluid extraction device (siphon, turkey baster, etc.)
3. Fully retract all hydraulic cylinders and jacks.
Process:
1. Using the fluid extraction device, remove one quart of fluid from the power unit reservoir.
2. Add 1/2 quart of the specified fluid.
3. Extend all hydraulic cylinders and jacks fully.
4. Add the remaining amount of the specified fluid.
5. Fully retract all hydraulic cylinders and jacks.
6. Run the Auto-Level feature on the Level-Up system per the instructions found in the Owner's Manual.
NOTE: If the noise persists, the addition of a second quart may be necessary. Follow steps 1 through 6.

GENECOP wrote:

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Our system is Bigfoot. It has done it from day one, three years later it still OCASSIONALLY does the clunk....maybe air, maybe just normal cooling , condensing etc...One day if passing through a GOOD Bigfoot service center I will probably stop in and get a tune up, fluids replaced , adjustments, whatever....not sure what if anything Bigfoot recommends for maintenance.....Thanks, G

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 Gene:

I’ve been to the Quadra factory twice and both times they told me other than what they say in the manual there is no other maintenance required or recommend.  FWIW

But from our original manual it says that once every 6 months they recommend extending the rams fully and spraying them with 100% silicone* lubricate.  Specifically NOT WD40 as it attracts dirt. I do this more often as well as giving the limit pins a shot of silicone and exercising them when I do.

If you have them down for an extended period of time they also recommend giving them a good shot of silicone to lubricate before raising as the seals will be very dry after sitting a month or more.

* Most “silicone” lubricants are not 100% silicone. Here is where we get i:.

http://www.amazon.com/gp/product/B000BXOFJI/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

We’ve had good service following this procedure although I do carry two spare hydraulic hoses and a spare limit pin.  But you know me and spares.

Linda just said, “Have you run the Big Foots all the way down recently.”  As Howard would say: Sheeeesh.  J

Bill