Anyone ever heard of this problem? The direction contacts pull in like they're supposed to when the direction lever is moved into forward or reverse. One of the problems is that there is no forward movement, I checked the contact surfaces and they look like new. Take a bit of emery cloth and polish the surface and away it goes. Operator drives for a day and tells me that it occasionally doesn't move forward even though the contactor pulls in.

Today, a day later, it quits again. I checked everything and then gave the contacts a little polish and away it goes. I've checked that there is spring pressure for the reverse contactor tips that are the double acting style and it seems fine. The moving contact armature doesn't bottom out until after the contact tips make contact.

It almost seems that the contact surfaces are being covered or coated with something that is non-conductive but they are the second set and the work environment is clean and dry.

Any thoughts or has anyone run into this problem before?