I took it apart, cleaned it, still not taking quarters.
I tried it full, half full, and without any quarters in the tube, still not taking quarters.
I put on a known good coin vaildator (top part), no good...still not accepting quarters. It will take any coin except quarters. I tried old quarters, new ones...it just will not accept a quarter.
I would return the mech to the supplier/seller. You've got a bad mech. Unless you know how to repair mechs..there's nothing you can do.
Here's a pdf file for the 6800h
http://www.vendingwo...ch-TRC6800H.pdf