Posted by jaimesbeam on May 24, 2014 at 10:54:22 from (76.179.148.79):
I have a Belarus 250/310 that I have to play with the starter solenoid every spring. The wiring inside mystifies me. I know how to wire the solenoid to the tractor, and how it works, but every spring I have to play around with it, and eventually I get it to work, but I'm not sure how/why.
The solenoid, which is mounted on the starter has two big electrical connection bolts. One goes to the tractor battery, the other is connected to the starter itself. Inside the solenoid one bolt has no connections and one has a wire that goes into the solenoid coil. When the solenoid coil is energized, a disk makes the connection from one bolt to the other, turning the starter motor over, and also pushing a gear to connect to the flywheel.
The only other connection is the stud which is connected to the starter switch on the dashboard. This stud has two wires which go into the solenoid coil. When the starter switch sends power to this stud, it should energize the solenoid coil connect the starter motor to the battery power, and connect the starter motor bendix gear to te flywheel.
There is of course also a ground circuit to the starter and solenoid...
The problem is that it doesn't always work. Why are there three connections to the solenoid instead of one ( plus ground)
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