Posted by fixerupper on March 06, 2021 at 09:13:24 from (100.42.82.64):
This morning I messed around with this regulator. Releasing the tension on the field or current regulator spring did nothing, it still charged wild. I put an ohmeter on the wire between the generator field terminal and regulator just to eliminate the possibility of having the wrong wire hooked up. It is the proper wire. Then I put a piece of paper between the field points in the regulator and ran it. With a piece of paper between the points he generator still charged but it took some engine revs to get it to charge and at full revs it did not peg the 50 amp gauge but went up to about 40 amps. I returned the engine to idle and pulled out the paper from between the points. The engine pulled down a bit and the genny went back to full charge at just above an idle. When the genny was charging at full charge the voltage regulator points pulled way apart, the faster the engine ran the farther away they pulled apart. So this is where it sits. The owner sounded like it charged plenty high before so this is not a new problem that started in my shop. If a new regulator is needed the owner of this tug has an uncanny way of finding NOS military parts through his many connections. Will have to talk to him.
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