To find the cause of no spark simply and easy using no more then your eyes and maybe a 12 volt test light, work through my Troubleshooting Procedure. YES an Ignition Ballast resistor runs hot especially if the ignition is on engine not running. Most common cause IS THE POINTS
NOTE you state The resistor gets power from the solenoid on the starter, can that have anything to do with the problem??
1) An Ignition Ballast Resistor (if so equipped, around 1.5 to 2 or so ohms resistance) gets its INPUT power from the Ignition Switch, and its OUTPUT wires to the ignition coil input and such uses a 6 volt coil on a 12 volt tractor so the ballast drops battery voltage down to 6 for a 6 volt coil.
2) If a 12 volt tractor uses a 6 volt coil and ballast PLUS A START BALLAST BY PASS CIRCUIT that feeds unballasted voltage to coil (ballast output) ONLY when the starter is cranking but otherwise the coil gets the reduced ballast voltage from the ballast output to coil.
Test the ballast and work my Troubleshooting Procedure An ignition ballast would read 1.5 to around 2 ohms through it WHAT DOES YOURS READ ?? If its an open circuit power cant get to the coil
If a 3 wire alternator is used with a resistor (instead of diode) to prevent run on after switch is off THATS NOT THE SAME AS AN IGNITION BALLAST What is your ballast used for, is it an Ignition Ballast (between ign switch and coil) or one used with the alternator (between alternator pigtail and coil) ???
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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