Finally got the 20/20 system and the Dicky-john hyd drive all working.  Now when I try and bring up my vac. I can only get about 14-15 inches as I do test planting with seed in all my boxes. 

Previous years I just ran the JD plates and only needed 8-10 inches max and could always get it.  My seed size calls for 20-22 inches with E-sets.  Planter prob. 20 years old. 

Took it into the dealer today.  Kind of wish now I would have just torn into it myself as they are busy this time of year. 

It looks like it would prob. just be the impeller or maybe the hyd motor.  I can't say the vac. hoses fit that tightly on the metering units any more.  

  Anything else you could think of it could be ?