Posted by Texasmark1 on October 16, 2018 at 05:43:19 from (75.107.74.117):
In Reply to: Positive ground posted by Fordy20 on October 15, 2018 at 16:48:57:
DC motors are polarity sensitive. If you expect it to run in the designed direction you need to maintain proper polarity.
If you have two completely separate "power loops" you can run your sprayer properly.
A power loop is a battery terminal connected to a load input (case or terminal) with the load output (case or terminal) returned to the other battery terminal. If only one point in the loop connects to another power loop, like the tractor's chassis for a "ground" reference, no problem.
Taking the JD 4020 as an example there were 2 batteries connected in series for 24 volt starting but 2 separate power loops ( 1from each battery) to power accessories in both the positive and negative directions....just maintaining the closed loop on each battery for the accessory.
Yes to answer your question, a separate battery, polarity connection as required, with only one connection point to the tractor/sprayer common "ground/chassis".
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