I was thinking a broken cog on a pinion gear or a slipping pinion from a broken Allen screw or pin, but though I’ve encountered such things on farm equipment, I was hesitant to postulate such on a slide-out mechanism that I know squat about. So I reviewed YouTube videos for some insight… there are many. Though our rig has an HWH system, I saw one Lippert-produced video that references their own spur gear that looks like ours. So if with Fred’s experienced suggestions implemented you find no issues, you might check the pinions (spurs) and racks for integral teeth.
If there are two hydraulic rams instead of one, check for leaking around the hose connections for the one on the jamming side. If it’s like ours, there is a single HWH ram/cylinder which if leaking would presumably affect both racks. An adjustment may be all that’s needed, but a thorough exam of the mechanism as Fred advises is the first step. Admittedly, exposing that assemblage would be more ideal if you could get full extension, but you don’t want to force that which shouldn’t be forced. You may have to crawl underneath the Coach for the exam, but bay compartments may be obstructive; ours are attached to the slide and the slide drive can fortunately be seen above them when extended.
Search “Lippert Through Frame Slide-out Troubleshooting V1” as a start.
There is a procedure for pushing back in a stuck extended slide, but you must relieve hydraulic pressure by carefully backing out solenoid nuts a few turns on the manifold commonly found with the tank on the frame under the entry steps; it may be elsewhere on some models. I’d assume you could push a retracted one out similarly, but you’d need multiple people involved, and some rather original thinking/engineering; one video producer laid on the floor and using care pressed with his feet on sidewall edges. A companion on the other sidewall pressing equally would obviously be advised.
Joel
Lippert spur gear below.
