Dixie Narco 501 automatically selects with out pushing button.

[Cool57]

I am new to the Pepsi machine business. I picked up a Dixie-Narco 501 machine for my frat house. The problem I'm have is that when I insert my dollar the machine automatically selects bay 1 and dispenses with out pushing anything.  I've reset by unplugging several times and the machine would work properly for a while then back to selecting bay 1 automatically.  Please advise.

[AZVendor]

Gummed up motor brake on column 1. Wash it with windex and work the brake to clean up the pivot points. If that doesn't work then replace the motor.