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Ag leader liquid control module rate not working
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Posted 11/18/2023 06:49 (#10486574 - in reply to #10486128)
Subject: RE: Ag leader liquid control module rate not working

Near Intersection of I-35 & I-90 Southern Mn.
SDfarmer44 - 11/17/2023 19:14

I have a hagie sts12 with ag leader liquid control module, went to spray tonight 6 gal work and it would ramp all the way up to 90 psi and 12 gpa. The tips I have are 6 gal at 14 mph and 45 psi roughly. When I put it in manual and set the psi to 45 and drive 14 mph it’s right at 6. Flip it to manual and it takes off for 90 psi.

Not sure if it’s related at all but the auto steer was acting funny on it as well, would be driving right on the line and click auto steer engage and it turns off like the line is 10 plus feet away.

Any ideas what I have going on? Was on phone with ag leader tech support and stumped them, they mostly had me try controller valve settings and they didn’t affect much.

What type of control does your STS-12 use? A common method would be a PWM valve which is controlled by the Liquid Product Control module. If so, there are some settings that may have inadvertently got changed. One such item is the low flow offset. If this is set too high, it will prevent the system from controlling properly at low rates.

I don't have in seat experience with an STS-12 and PWM control but will soon since I traded my STS-10 toward a somewhat newer STS-12 with PWM control. The STS-12 will be delivered toward the end of the year. The STS-10 used a hydraulic servo type valve for pump control.

Since your steering has been acting up this might be due to a problem with GPS, especially if you are using WAAS since I have experienced some steering issues of late with my WAAS tillage tractor. Since GPS might also be involved with your sprayer's speed source, it is possible that the speed is erratic and causing confusion with the applied rate.

Edited by tedbear 11/18/2023 06:50
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