Hello, I'm new to the forum. I have been fixing up a Bowser 1510 pump noted on the manufacturing plate. It has a VeederRoot computer display. I need some advice on its operation. I took the turbine off and used a drill motor to turn the gallons at 0 cents setting and it turned freely and I was 'happy'. I then followed the directions to try to change the price to 30.9 and now the drill motor won't turn the meter readings, I'm sad! Something is apparently jammed. It was hard to change the settings from 0.0 to 30.9 following the directions on the instrument cover. I tried clearing the display with the lever and it won't clear either. What wisdom and knowledge might the forum share with me? Thank you very much I live in the Los Angeles area.