My Vendo V63

My Vendo V63 I picked up Fri. Had to do a few repairs, but biggest problem is the Veri-price 50 coin mech. Seen even after cleaning it does not want to vend correctly with quarters. Dimes up to .50c seem to work, nickels it's hit or miss, but quarters act up, vending anywhere between .75c and $1.50. I tried the coinco out of my Vendo V220 that's set at .50c and it worked fine with all coins. Think I'll try to find a replacement mech that I csn set a price higher than .50 for it.