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Eastern Iowa | Installed Rawson Drives on two separate Kinze planters last year. I did not use the double reduction sprockets, on the Kinze's I went direct from the Rawson Drive 12 tooth to the split sprocket 36 tooth, resulting in a 3.0 gear ration. Planting last year one of the Drives had failed the last day and the other customer mention a few times he had a stalled drive. At that time I thought the failed drive was just a bad unit and the other guys was due to insufficient oil flow/pressure since its on a IH 1086. Now I'm wondering if its due to not having the correct torque/gear ratio especially since both are Finger Meters w/insecticide. I have another customer running a Deere 1760 Vacuum planter with a 4.42 gear ratio and zero issues. I know the Deere vacuum should turn easier and the gear ratio probably also helps.
My question, is there a targeted gear ratio required by a Rawson Drive for certain planter models and do I need to be using the double reduction gears? I have a client installing a Drive on a Deere 1760 Vacuum this Spring, we can go direct from Rawson to 36 tooth split sprocket resulting in a 4.42 ratio, or should we install the double reduction?
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Rawson Drive targeted Gear Ratio
