IM Tunnel motor up and quit- any troubleshooting suggestions?

[engineshop]

My IM tunnel motor did the same thing. I took it apart and the two cast metal pieces fell apart in dozens of pieces. It had zinc pest. IM replaced the pieces.

[nkalanaga]

Roland:  I've heard of that in older models, but not in models from the last couple decades.  I wonder if they got  their metal from a new supplier?

[squirrelhunter]

UPDATE: I was able to get my TM apart to give it a through once over. Everything checked out ok- trucks, worm gears, drive shaft. Turned out it was the contact between the motor leads and the PC board. I bent the leads up a bit so they would contact better and used some rubbing alcohol to clean the bottom of the PC board contacts, which had a little dirt on them. It runs well now.

Thanks for all your help guys!

[jagged ben]

Just like I said.