Near Intersection of I-35 & I-90 Southern Mn. | Firstgenfarmer9600 - 11/25/2023 18:24
Looking at a early hagie sts12 sprayer ( I believe it was serial 20 or close to it ), seems to be in good shape at dealer . It has john deere 1800 display and atu for steering. What would I need or what would be my best way to get auto swath , and at what cost ? Trying to weigh my odds to see if I should pass on the machine or buy it if we can set it up for a decent cost. Thanks in advance
Your title caught my eye since I am in a somewhat similar situation. I purchased a used Hagie STS-10 a few years ago. Rate and section control were handled by an Ag Leader system. It consisted of an Ag Leader display, Auxiliary Input Module and Liquid Product Control module. The Ag Leader display had been removed but the Auxiliary Input Module, Liquid Product Control module and wiring remained. I was able to use the system with my Ag Leader displays. Actually I have 3 but move the one from the planting tractor and its high end GPS to the STS-10 for spraying season. This means the variety maps are available on that display while spraying which might be useful. The STS-10 used a hydraulic Servo valve. The Ag Leader system controlled the hydraulic flow to the spray pump for rate control. The Liquid Product Control module would shut off sections that had already been sprayed based on its coverage map or section switches. This worked well.
This Summer I returned to the dealer where I had purchased the STS-10 and traded it toward a somewhat newer STS-12. It is my understanding that the STS-12 (a least the one I am getting) uses a PWM hydraulic valve instead of the Servo Valve that my STS-10 uses. The Ag Leader Liquid Control Product module can work with PWM valves as well as other control arrangements.
I made the trade "without technology" as the dealer refers to it. That means I will remove my Ag Leader display, the Ag Leader Auxiliary Input Module, the Liquid Product Control module and basic wiring from the STS-10. The newer STS-12 will be delivered "without technology" which means the previous control system (Viper I think) will be removed. I believe the sprayer may have originally been shipped with a Raven 460 or the like.
The wiring harness that I have unplugged and removed used connectors to "tee" into the original Hagie wiring. It appears that this same arrangement is used with the newer sprayer.
In checking some documentation, it appears that the modules and wiring that I removed from the STS-10 should work with the newer STS-12 with some minor wiring changes. One change is to bypass the boost circuit that was originally used with the previous system since the Ag Leader Liquid Product Control Module can handle the electrical load of the PWM valve directly. Also a switch might be desirable to break the circuit to the PWM valve so the operator can immediately stop oil flow to the pump if the need should arise (spray tank runs empty etc.).
A friend who works with these systems indicated that when he did this for someone else that rather than using a simple ON/OFF switch in the PWM circuit he used a double throw switch. This switch has three positions, 1) normal operation where the PWM from the module gets to the valve and controls the rate, This position would be used the majority of the time so that the Ag Leader system can control the rate. 2) Center OFF - no connection to the PWM valve so the pump stops for those situations that the operator wants to be certain that the pump has stopped such as an empty spray tank. 3) Manual position where 12V is fed to the PWM valve for occasional use for rinsing out the tank etc.
My plan is to follow this idea with a switch that allows for this Normal, Off, Manual option. I plan on wiring in some LEDs so the position is obvious to the operator. This will involve using a Double Pole Double Throw switch. I may add a back-up beeper so that when the switch is in the Manual override position that the beeper will sound alerting the operator of that choice.
I have not received the newer sprayer yet (should be delivered fairly soon) so I have not had an opportunity to try these ideas. Time will tell if this works out as planned. Something similar can likely be done with other brands of controllers/section control but I am most familiar with the Ag Leader arrangement.
Edited by tedbear 11/26/2023 08:12
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Early Hagie sts12 section control/auto swath options
