Since we purchased our Wildcat in 2004, we have had problems with the slide moving in and out slowly. We also found that the pump motor draws 70-90 amps! Now the pump reservoir is leaking, presumably around the connection to the pump.Picture 1 is pump before removal.Picture 2 is tank with hydraulic fluid and sludge.Picture 3 is magnet with sludge.Picture 4 is pump without tank.I have removed the pump and have a few questions.1) Lippert manual states Automatic Transmission Fluid (ATF) should be used in the pump. My pump does NOT have ATF, rather it looks and smells like hydraulic fluid. When re-installing, should I use ATF? If so, how can I bleed the fluid from the cylinder? If not, what type of hydraulic fluid?2) What caused it to leak? O-ring is clean and soft. No damage. The rubber o-ring and matching plastic housing looks like a poor design. It will probably always leak but what can I do to prevent future leaks? Should I clean it up and re-assemble? 3) Lots of "gunk" in the tank. There is a magnet and it was covered with a bunch of metallic "sludge". This was also present in the bottom of the tank. Where did it come from? Is this why the pump draws so many amps? Should I disassemble the pump and see if there is any damage?4) Why is this unit mounted on it's side???? It seems like the most logical mounting direction would be with the tank facing DOWN. Fluid would not leak from the area between the tank and pump if it were facing down. Of course if mounted facing down, the fill cap would need to be at the other end of the tank.5) Is there an electric motor available to move the slide in and out? How difficult would it be to do a retrofit?Picture 1 is pump before removal.Picture 2 is tank with hydraulic fluid and sludge.Picture 3 is magnet with sludge.Picture 4 is pump without tank.

I've noticed that only smaller slides (like mine) are electric rack and pinion. I think there's a real limit to how much work the all-electric system can do. I think your best bet is to repair or upgrade the weak components in your system.

Would this hydraulic pump and reservoir be a good replacement? I am not happy with the Lippert solution and replacement from Lippert is big $$$$.

I think that either your pump rotor, vanes or whatever is in the pump are going or the bearings on the pump shaft are gone. Also it is possible that one of your cylinders pistons are rubbing on the cylinder wall which means that your cylinder (cylinders) are out of alignment. If it is a cylinder it will need to be replaced. The only way to find out is to pull the cylinder apart. I would first check out the pump since you already have it on the bench. To bleed the system you only need to crack open the hose fitting to the inlet and also the outlet, start the pump and move your valve to extend and then retract until you have dispensed all the air from the system... Also use the oil that the manual recommends... Also using the wrong oil might have caused the piston cups to deteriorate. Hopefully that is all that it is, no problem replacing them... T-10

A friend of mine had a pump that started leaking. He told me that there was a recall on his pump, and the dealer made the repair. You should check to see if your pump is under the recall for the leak.

We have a 2006 wildcat delivered in may 2005 and the pump developed a leak. I contacted Lippert about repairs, they asked for my Vin and told me they would cover it under warranty and gave me a repair # to give to my repair shop. They ended up putting a new pump in

Leaking Lippert Slide pump - with pics | Good Sam Community

LarryS1
Explorer
Apr 02, 2016
Charlie D I do have a NAPA in town. I'll have to check them out.

Thank you
LarryS1
Explorer
Apr 02, 2016
Pirate I've never heard of Lippert until I was having problem. I agree though since I've been reading about my problem I see that Lippert has nothing but problems with their product. I guess a recall has never been their option.
Charlie_D_
Explorer
Mar 31, 2016
LarryS1 wrote:
As you can see I don't usually change O rings. I've never heard of that before. I was thinking about tackling changing the O ring in the pump and was trying to find out more information.

Thank you

Motion Ind./Dixie Brgs. Perhaps NAPA if one is near you. I use Bing as a search engine. Search "O-Ring splice kit". Have a large assortment of kits, even Amazon. Buna N would probably work.
Pirate1
Explorer
Mar 31, 2016
On my second rig with HWH slides and jacks. No problems at all and my rig is a 2006. The first one was a 1997 with no issues when I sold it in 2005. I just don't understand why anyone would buy a rig with anything made by Lippert. I have read nothing but problems with Lippert systems for the past few years.
LarryS1
Explorer
Mar 31, 2016
As you can see I don't usually change O rings. I've never heard of that before. I was thinking about tackling changing the O ring in the pump and was trying to find out more information.

Thank you
Charlie_D_
Explorer
Mar 30, 2016
Made many an o-ring. There is a kit that has multiple size rubber material. The kit usually includes the o-ring material, a single edge razor and a small flat piece of plastic that has various holes in it. The material slips into the correct size hole and the end has a slot for the razor blade. Slide the blade in and push. It will cut the rubber material straight. Take the super glue that is provided and glue the ends together.
LarryS1
Explorer
Mar 30, 2016
So I take it (with the sound of crickets) that nobody is having trouble anymore???

I was just told by a dealer that they make their own O rings for this. Has anyone one this??
LarryS1
Explorer
Mar 22, 2016
Is putting in the O-ring helping everyone?
Mine has been leaking for about 3 years now.
And is the O-ring you are talking about between the reservoir and the pump.
I was told by my dealer 2 years ago that I would have to replace the whole hydraulic pump. I have a 2003 wildcat and the pump has manufacturer of CMS
Jeff78130
Explorer
Jun 08, 2014
Hopefully this will add a little info to this thread. I have the same problem with the leaking O-ring. I replaced it this morning and it doesn't seem to have any leaks yet, mainly this is to say where I got the ring and how much it cost.
Thanks to some of the earlier posts, I saw that I would need a #348 Buna-N O-Ring, 70A Durometer.
I was able to go online and find Global O-ring and Seal, based in Houston, Tx. They have the rings for $5 and you can order them online. Item #QN70348

http://www.globaloring.com/Item/348-quad-ring-x-ring-nitrile-70-durometer-cs-210-5-33mm-id-4-350-110-49mm/

If it blows out anytime soon I will post and complain :-)

Sure enough, it started leaking again a few weeks later. Figuring I had nothing to lose, I took it apart and applied the Permatex. It started leaking after a few months also. I ended up buying a new Lippert Pump from Dyers RV for about $325 just because I got tired of wiping ATF out of the bottom of my front storage compartment. Seems to work fine so far.
Lippert Products Slide-Out Power Unit 643150 with 2QT Reservoir
2004 Forest River Wildcat.
JochenHeiden
Explorer
Nov 08, 2013
I want to thank everyone here for the information! My father's 5th wheel uses this same system and it has been leaking out of control for some time. The actual pump says Controlled Movement Systems CMS0007, and the plastic reservoir says Haldex - Barnes Hydraulics. I determined that it was a bad o-ring installed between the reservoir and the motor. Using advise here, I purchased a #348 quad-ring and a 4.5" hose clamp. I installed the new o-ring and tightened the clamp against the flange as best I could (the o-ring sits a little further forward but the clamp can't hurt) and so far we don't have any leaks. I highly recommend the quad-ring, it has a much better sealing surface that a traditional o-ring.

I work aircraft hydraulic systems in the Air Force, but the simplicity of this system confounded me for some time before I visited this forum. Thanks all!

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