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Re: 4020 12v/24v system
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Posted by Bob on October 18, 2006 at 21:31:50 from (69.178.229.154):
In Reply to: Re: 4020 12v/24v system posted by Dan-IA on October 18, 2006 at 21:07:55:
Dan, As an IH guy, you are missing a TREAT, not realizing Deere/Delco came up with a split 24-Volt-12-Volt system for the diesels from the late '50's to the mid-to-late 60's Nick's correct. It IS a 24-Volt system. The midpoint of the two batteries is grounded to the chassis, giving (+) 12-Volts for 1/2 of the lights, and (-) 12-Volts for the other 1/2 of the lights. This system worked GREAT for it's era, but nowadays, trying to operate lots of 12-Volt (-) ground accesories can cause problems with the charging system providing enough current to run the (-) ground loads, as it charges both the (+) ground battery and the (-) ground battery in
series. nick, What is the CCA rating of the batteries? Are they both fully charged when you atempt to crank the engine?
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