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Help me get the correct orifice disc
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NoTillSteve
Posted 3/11/2026 18:10 (#11581529)
Subject: Help me get the correct orifice disc


Hello, I've got a new to me 11 row 15 inch john deere 1780. I'll be planting corn on 15s. I'm going to be running 24s out the back with dribble tubes. In the past Ive run squeeze pumps and honestly been very happy with them. This planter has a pto powered pump and an electric valve. Ive got the liquid flowing but it is uneven. I've been told that I need orifice discs to even it up. My question is how do I choose the discs that meet my needs. I want to plant at roughly 5mph and put out 20 gal per acre of 24s.

Who can walk me through the calculations?

Thank you!
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