Wayne0 1,116 #1 Posted March 6, 2023 My tach (rpm gauge) pins the needle at idle. Any ideas? 1 Share this post Link to post Share on other sites
lynnmor 7,706 #2 Posted March 6, 2023 Is the gray wire connected to one of the outer terminals of the voltage regulator? Is the mounting bolt for the regulator tight and grounded properly? Is the charging voltage appropriately 14 volts? Share this post Link to post Share on other sites
Wayne0 1,116 #3 Posted March 7, 2023 (edited) Charging voltage is good (checked) , as i just replaced the regulator. I will check the other stuff. Thanks. Edited March 7, 2023 by Wayne0 1 Share this post Link to post Share on other sites
Wayne0 1,116 #4 Posted March 27, 2023 Bad connection with the grey wire to the reg. New plug fixed it. Now I'm getting 14.4 volts to the battery, but the gauge says 11 volts. Am I nit-picking? 1 Share this post Link to post Share on other sites
lynnmor 7,706 #5 Posted March 28, 2023 8 hours ago, Wayne0 said: Bad connection with the grey wire to the reg. New plug fixed it. Now I'm getting 14.4 volts to the battery, but the gauge says 11 volts. Am I nit-picking? Check the voltage right at the dash voltmeter, you might have a bad meter or a poor connection. You are not nitpicking, having the proper charging voltage is important for the life of the battery, lamps and other components. Having a known accurate voltmeter right there in the dash can head off larger issues. 1 Share this post Link to post Share on other sites
Wayne0 1,116 #6 Posted March 28, 2023 (edited) 17 hours ago, lynnmor said: Check the voltage right at the dash voltmeter, you might have a bad meter or a poor connection. You are not nitpicking, having the proper charging voltage is important for the life of the battery, lamps and other components. Having a known accurate voltmeter right there in the dash can head off larger issues. I will do that. This critter has/had electrical problems in the past (before me) that I have to work thru. Mechanically everything seems good, so far. Thanks for your help. I love this place! Edited March 28, 2023 by Wayne0 1 Share this post Link to post Share on other sites
WHX?? 51,370 #7 Posted March 29, 2023 Having four 520's I have come to the conclusion that some of the volt gauges are not accurate. Most of mine read high, 15 volts plus with 12.5 on them measured with a DMM. 1 Share this post Link to post Share on other sites
Handy Don 13,683 #8 Posted March 29, 2023 41 minutes ago, WHX?? said: Having four 520's I have come to the conclusion that some of the volt gauges are not accurate. Most of mine read high, 15 volts plus with 12.5 on them measured with a DMM. Last year I got an inexpensive marine digital voltmeter off the jungle site to add to a tractor. Tested it out of the box over the 0-20vdc range and it surprised me by being within 0.5v all the way. My theory is that for the analog gauges on our tractors, modest initial accuracy plus all the jouncing around and aging takes a toll, Share this post Link to post Share on other sites
