Near Intersection of I-35 & I-90 Southern Mn. | Your Spra Coupe likely uses the Polarity Reversing valves that you mention. You could change one or all to the other non-polarity reversing valves which have a relay built inside to handle turning the motor in the correct direction to open/close the valve.
I assume your Spra Couple uses a Raven controller in it. Remember the Raven must be made "aware" of which sections are ON at any given time so that it can calculate the spray width and thus the spray rate correctly. Your old valves did this with the single wire that "back fed" the Raven controller. Your Raven controller doesn't actually turn the valves ON/OFF like it does in some installs but it needs to be made "aware" of which sections are currently ON.
If a new valve is used to control a section that is fine but the line informing the Raven must be considered. One way to check this is to watch the Area/hr. The Area/hr should change when you turn ON/OFF the new valve. If the Area/hr doesn't change the Raven is not being made "aware" of that valve's status.
You mention fence line tips. Fence line tips are often just teed off of the hose feeding the outermost tip on the outer boom section. This hose goes to a small solenoid that is normally off but leads to the fence line tip. Each fence line tip is controlled by a switch of its own. The Raven is not made aware of this so the acre count and the calculated spray rate are the same whether the fence line tip is ON or OFF. The small amount of spray for the fence line tip is essentially "robbed" off the entire flow so the rest of the boom gets slightly less than it would have when the fence line tip is OFF. This slight reduction generally is not important since the amount of change is pretty minor to each tip.
One problem with fence line tips using the main product is that the product may kill broadleaf weeds and grass which is desirable in the main portion of the field. Killing the grass in a fence line might actually be undesirable since after killing the grass the broadleaf weeds really come on strong.
To prevent this, some fence line tip systems involve using a completely separate spray system and product (no grass killer). Since the flow demands are quite low, this fence line system can often be handled by an electric pump that is only used to pump a broad leaf weed killer from a separate tank to one fence line tip or the other. This fence line approach consists of a small tank of its own, electric pump, switches fence line tips etc.
I've had sprayers with fence line tips that use the main product but rarely used them. Your situation is likely different.
Edited by tedbear 1/17/2026 07:43
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3630 Spra coupe valve issue. (Wiring)
