02 jay manual slide doesn't work

[Dnoonan923]

I recently acquired a 2002 31 by jay flight from my cousin with a manual slide. He had stated the the slide was stuck out, I was able to make it retract, however it seems like the hand crank lever isn't engaging the the gears for the slide. I've owned a lot of campers , but never a manual crank ,so I'm a little lost. Is there a shear pin the attached the gear to prevent free spinning? Does anyone know the brand Jayco used in 2002? Thank you any help is appreciated.
Dan