Hi Jim, my name is Dale. I have two questions.
1. Is the slide mechanism accessed by lifting the bed, or is it accessed from underneath the motorhome?
2. What specific pin is shearing?
I'll await your reply.
Thank You,
Dale W.
OK, let's make sure I have the correct slide out in mind. I have rotated the picture so it's oriented as if installed. Let me know if this looks like your slide mechanism.
Thanks,
Dale
Yes, that's the slide out system. RBW manufactured it, model # GSO-23066B. Single arm system, has a 15 tooth gear attached to the motor that drives a 40 tooth gear. The 40 tooth gear is pinned to a drive shaft that goes across the arm/tube asembly. There is a 15 tooth gear pinned to the shaft. The 15 tooth gear engages the gear rack welded to the square tube and drives the arm in and out.
The pin that keeps breaking is a 1/4" diameter stainless steel clevis pin with a round head on it. The same pin is used to attach both the 40 tooth gear and the 15 tooth gear. If I understand, the pin that keeps breaking is the one securing the 15 tooth gear to the shaft. Is that correct?
Yes, there are positive stops attached to the mechanism that are designed to prevent excess travel. Explanation will require a picture, hopefully you can get it to enlarge.
Give me a few minutes to get the picture and instructions for you. We'll get you hooked up.
OK Jim. Here is another print that will help you identify the stp bolts. They originally had a red polyurethane bumper attached to the end of the bolt that may or may not still be there.
If the red bumpers are missing, that's o.k. As I mentioned, the positive stops are a mechanical means of preventing excessive travel of the room. They are intended to come into play after the room has achieved full seal.
Adjustment procedures are:
I also suggest you take a look at the hole in the shaft that the pin goes through. My experience is that the hole in the shaft will elongate, flexing the clevis pin as the shaft rotates. The pin will only take so much before it shears.
If you find the shaft is worn a replacement kit is available here: https://myrvpartsplacestore.3dcartstores.com/RBW-P-201F-Fleetwood-Motorhome-Slide-Out-Repair-Kit--RBW_p_34.html
Also, there are no electrical components that will limit travel except for the in-line circuit breaker. Specifically, no limit switch or room controller. Your fingers on the key act as the room controller. Holding the key switch too long can also put adverse pressure on the clevis pin and shaft.
Between the positive stop adjustment and the shaft (if worn) you should be in good shape.
Jim, I appreciate the opportunity to share my expertise with you. Please let me know if you need anything further.
Sincerely,
RV Parts Store Owner
11 yrs with a major component mfr. performing product development, technical support, field service
Jim, I'm positive it's stainless steel. The clevis pin was not intended as a shear pin, but rather a means of fastening the gear to the shaft. That's why I strongly suggest you inspect the shaft itself to see if the hole has wallowed out.
Without tooting my horn, I think I know your slide out systems better than anyone else, since I was involved in the design by seeing what it would take to break the thing.
In most cases the circuit breaker will trip before any damage is done to the gear. The most common cause of gear damage on your mechanism is when the nylon spacer between the tube and inside of the channel is worn or missing. That allows the tube to lift away from the gear at the end of retraction. When that happens the teeth of the gear catch only at the tip and the leverage will break them off.
Here is a drawing of the clevis pin:
Here is an exploded view of your mechanism:
I trust this helps.