Several items: The system is not keeping up with the load of the plow draw. If the new batteries can be charged using a charger to 12.6 and then they work well to start the truck they may be OK. New batteries can be bad. Is the cranking amps of the new bats the same or larger than the original? If they are appropriate, the charging system may be at fault. The battery voltage should be 14.2 to 14.6 volts with nothing turned on but the engine. The voltage may be 13.5 or so just after the startup. and get to 14.2 within 5 minutes. Is the drive belt tensioned correctly? Is the belt worn and bottoming in the multi grooves? Is there a voltage drain in the circuit when the truck is off? Is the electric motor on the plow hydraulic system drawing more than allowed. I also believe an amp meter that is hand held and pressed against the wire, (cheap) will allow a clear measure of alternator utput in real amps. Jim
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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