Originally Posted by accumack
They don't really loosen they slip.
Sorry to disagree, but they loosen and then slip. They are bolts and not nuts. If you torque them down too much you will strip the soft aluminum gear housing.
For reference, see the prior post:
I just had the problem for the third time while on a trip. I raised the motor tightened up the bolts with blue Loctite and upon getting back over 1,400 miles it was okay, but I noted the top two bolts where looser then when I left them.
Just yesterday, I decided to support the motor and gear housing as Silver did on 03/06/2015 (see prior post). Instead of the fancy support, I used a block of wood with some shims (see attached photos). Will have to see if that works! I also cut off part of the bed's shroud-cover to make getting to the mechanism a lot more easy.
Here is my theory (which may be all wet): The designers of a lot of things for the RV may have done a good job for stationary, non moving operation. However, they didn't take into account operation with a lot of vibration and external forces. The bed's drive gear doesn't decide on its own to come down. I feel that when driving down the road at 60 mph (or so), hitting bumps after bumps, the cantilevered gearhead and motor is yanking like a pry bar up and down on the four bolts. Since the bolt threads are course and not fine, this constant up and down motion cause the bolts to walk out - IMHO.
Well, here is my fix, which still needs to be proven: