Originally Posted by yellow_cad
One worm gear goes and the other doesn't. I need to know how to get the motor unit off the chassis so I can see why one worm is not being driven by the motor. Thanks for any help. Jim
There is a small plastic "joint" that fits between the worm and the motor; if this falls out (and it is REALLY small) you will not get power.
I purchased one "not running" for parts, and turned out this was the only thing wrong. A cheap part replacement put it back in use.
Disassembly is a mother on these things, so do it over a shoe box lid or some such, not a carpet, and catch anything that falls out. you need to loosen the screws on the plates that hold the trucks in. I will try to post some guidance pictures later.