jdstl Posted January 24, 2012 Share Posted January 24, 2012 Hello Guys,did a search and found that to change over to the negative ground setup and have the original generator work I need to polarize it. What terminal do I need to hook the + side to? Also do I need to change how the wires are hooked up between the gen and regulator, or does that stay the same?Thanks,Jason Quote -Jason-1959 Mack B61T single axle short wheel base, concave cab. 673 diesel, duplex trans. Running but under contruction! Link to comment https://www.bigmacktrucks.com/topic/22839-polarizing-generator-from-ground-to-negative-ground-59-b61/ Share on other sites More sharing options...
Rob Posted January 24, 2012 Share Posted January 24, 2012 Hello Guys,did a search and found that to change over to the negative ground setup and have the original generator work I need to polarize it. What terminal do I need to hook the + side to? Also do I need to change how the wires are hooked up between the gen and regulator, or does that stay the same?Thanks,JasonYou need a different regulator for negative ground. You cannot feasibly change the polarization of this unit. Once a new regulator is fitted, touch a wire from the positive terminal of the battery to the terminal on the generator for just a second to "polarize" it. Start the engine and it should be charging for you.Now would be a good time to fit an alternator rather than retain the original generator. A Delco "10SI" is very easy to make mounts for and fit to the engine. It is also self contained with a regulator.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/22839-polarizing-generator-from-ground-to-negative-ground-59-b61/#findComment-99454 Share on other sites More sharing options...
theakerstwo Posted January 25, 2012 Share Posted January 25, 2012 Some of the after market reg were neg or pos. But if it is a real deco its one way or the other.Like Rob said from the bat ter to the gen ter on the regulator with a screwdriver.When i started working truck that was all they had. No alternators unless on a car. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/22839-polarizing-generator-from-ground-to-negative-ground-59-b61/#findComment-99499 Share on other sites More sharing options...
jdstl Posted January 25, 2012 Author Share Posted January 25, 2012 Sounds like its going to be a alternator. I talked to the Generator shop that built me the starter, they recomended a 22SI as its a truck alternator and puts out 100+ amps. I think I'm gonna go that way, its only $125 anyways.Thanks for the imput guys.Jason Quote -Jason-1959 Mack B61T single axle short wheel base, concave cab. 673 diesel, duplex trans. Running but under contruction! Link to comment https://www.bigmacktrucks.com/topic/22839-polarizing-generator-from-ground-to-negative-ground-59-b61/#findComment-99606 Share on other sites More sharing options...
fifth wheel Posted January 25, 2012 Share Posted January 25, 2012 The Delco regulators the battery and armature terminals are side by side, I used to use a quarter to polarize them. Don't let any thing touch the field circut. Alternators lot less trouble.FW Quote Link to comment https://www.bigmacktrucks.com/topic/22839-polarizing-generator-from-ground-to-negative-ground-59-b61/#findComment-99611 Share on other sites More sharing options...
Rob Posted January 25, 2012 Share Posted January 25, 2012 Sounds like its going to be a alternator. I talked to the Generator shop that built me the starter, they recomended a 22SI as its a truck alternator and puts out 100+ amps. I think I'm gonna go that way, its only $125 anyways.Thanks for the imput guys.JasonThe 22SI is a good alternator and is more "rugged" than the 10SI series. Glad to hear you will spring for the extra dollars for the better product as most will not. A 10SI can be had for less than $50.00, but the vibration of the diesel can make them short lived being full of chinese components.......Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/22839-polarizing-generator-from-ground-to-negative-ground-59-b61/#findComment-99617 Share on other sites More sharing options...
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