On 4/30/2014 6:50 PM, Charlie wrote:
The schematic shows what looks like a circuit breaker symbol INSIDE the lift motor coming off the common wire. And since my meter shows infinite resistance on both the up and down windings, if there was a popped breaker on the common that'd explain it.
Yep. It's on the front end of the motor, right under the brushes. Because the motor is drawing 18 volts when it stalls and the breaker pops it makes a nasty arc.
Does anybody know if there's really a breaker in there? Any tips for disassembly? The whole thing seems to have been dipped in black plastic, which I guess I'll have to peel off.
Simple. Just remove the two or four bolts that go the length of the motor. Take out the big round gear thing, then pull the front of the motor off. Then fix the breaker.
I'd recommend bypassing it, running the lift at 36 volts full with a 10 amp fuse in the panel. The motor will lift much better, the thing is a series wound anyway, and if it stalls the fuse will blow. It also pulls less current which is nice.
C