National Tradewinds slideout shearpin breaking

[michaelis]

I have a 2000 national tradwinds motorhome with 1 slideout...about every 3 months the shearpin under the slide breaks on moving the slideout out.We have put light items in the cabinets. Anyone have the same problem or suggestions on how to prevent?

[TXiceman]

First check the slide to see if any thing is dragging. Next lube the slide out. Let us hear if these help.

Ken

[historyljc]

Keep a check that the nuts holding the shear pin stay tight. If they loosen the pin will work down to threaded portion and break. Are the holes the shaft that the pin is in still in good shape or has it wallowed out over time. If so, it may have to be replaced/reworked.

[Dolph]

If you are replacing the shear pin with the roll pins you get at a hardware store you need to check with Powergear. They recommend that you use a spiral pin. Hard to find but worth the effort. Had a 2000 Dolphin and that was a common problem. Found a source for spiral pins and solved the problem.

[Jackm]

Brass Fittings Brass Parts Brass Fitting Brass Components Brass Plumbing Fittings india is a good place to start.

Jack

[Clifftall]

Quote:

Originally Posted by michaelis I have a 2000 national tradwinds motorhome with 1 slideout...about every 3 months the shearpin under the slide breaks on moving the slideout out.We have put light items in the cabinets. Anyone have the same problem or suggestions on how to prevent?

Is this a power gear system ?

[paz]

I agree with historyljc. If the bolts loosen up, they will have more tendency to break. Use a little Loc-Tite on the nut if this is the problem.

Also, if the holes are enlarged and there is too much slop, the bolts will shear more easily. On our main slide, the motor drives shafts made up of square metal tubing. I had one bolt that had loosened a while back, and the hole in the square tubing had become enlarged. I fought with that bolt breaking repeatedly for almost 2 years. I finally took the piece of tubing with the enlarged hole, exchanged it end for end, and drilled new, clean holes in the new end. No problems since.

[Dolph]

The bolts in the power gear system are #8 hardness. The OP said that the shear pins were breaking, not the bolts. In my situation I had both break from time to time, but usually it was the shear pins.