I am using a 750a 6 meter for the first time, and having trouble getting the seeding rate set. 2003 electric drive and running the JD brown box. Did that 100 meter calibration on the ground wheel and went through the seeding calibration several times weighing the seed and it will seed at about 1/3 of the set rate, I confirmed this with a truck scales. Only thing that doesn't make any sense is on the check calibration test it puts out abut 30 oz and it is asking for 300 oz. Meter is clean and looks nice rubber flap is good. any ideas ??
