Originally Posted by renhui
It's a 2016 178 with lippert slide-out system.
Tried search but couldn't find any info. esp. on DIY.
The motor runs but slide-out won't move, though I could manually move the slide-out in and out uisng a wrench without much issue.
It might be the gear in the actuator from what I read.
Have anyone tried to remove the motor/actuator assembly and replaced gear?
Thanks a lot.
If the slide uses a linear actuator (screw inside a tube) then what you describe means the gearbox has a stripped gear.
Lippert through frame units are fairly easy to remove the gearbox on. It's on the opposite end of the actuator from the slide itself. Held in place by two bolts, one top and one bottom, along with two wires that need to be disconnected.
On mine I was able to access the motor/gearbox by cutting a window in the bottom coroplast cover and resealing the flap using PVC Pipe Tape.
That covers the gearbox itself. Now for the bad news. Lippert doesn't appear to sell the gearbox itself, only as part of the complete actuator. I have seen some internal gears sold online by various sources so once the gearbox is out and it's been determined what has failed, a net search might yield replacement parts.
I would avoid like the plague any gearbox sold on Amazon unless it's an actual Lippert part. I made the mistake of getting one, attracted to the low price, but found they come WITHOUT the torque limiting clutch and the first time the slide reaches it's travel limit the only sound you'll hear is the main gear breaking. I sent mine back and Amazon not only refunded my $$, but the gearbox listing was removed.
In summary, if you can move slide in/out manually the actuator itself is OK. If you hear the motor running, it's OK. This points directly at the plastic gear inside the gearbox being stripped and not transmitting power to the operating screw inside the actuator.
When my slide quit it turned out to be a bad motor (brush holder too tight and not allowing brush to contact the commutator). I put in a complete new actuator and repaired the motor so I now have a spare actuator assembly. Guarantees I will never have that problem again
There are two gearbox/motor units used by Lippert, one "Tucson" and the other "Venture" (learned after a lengthy talk with Lippert Tech).
When shopping for parts make sure you match the ratio ( usually marked on the end of the gearbox) as well as motor speed (5800 or 9100 Rpm). If you have the more common "Venture" gearbox a complete gear set (OE style) is available on Amazon for ~$100.
It has a plastic gear which in my opinion is preferred. It will fail before anything else and protects the far more expensive screw/ball nut inside the actuator tube. A complete actuator with motor/gearbox is ~$700.
The gear/shaft assembly to the left in the picture contains a torque limiting clutch which also protects the long screw in the actuator. This clutch does not exist in the cheap Chinese copy gearboxes selling for $100-$200.