I bought a Crown FC4515-40 last December at Ritchies Auction. Battery was almost dead when I received it so charged it a couple time before using it. It worked fine for a couple of weeks and suddenly wouldn't go forward or reverse anymore. Service guy came to check everything, connections seemed good I have voltage on accel pedal when I push it but motor wont engage. It looks like it want to move but just move one or two millimeters. Crown told my guy it could be the drive motor that was faulty, he rebuilt the motor reassembled it and still doesn't work. My service guy is a little lost now