We got an old Trojan 1900 front end loader at the yard with an air cooled Deutz engine. It's the one in my avatar pic. We've been getting it into operable shape so as to put the Caterpillar down and take care of some much deserved maintenance. The batteries were flat(24v system), so I sent one of my guys to change them out with a couple of big car batteries until we get out to buy some kickass loader batteries.
I walked by as he was making the connections and stopped him right away. He was hooking the short lead that goes right to the chassis to the positive terminal of the first battery! I asked him, "Are you sure you want to do that?".
He assured me that that was how he took it apart,and he's not a dummy, so I let him carry on. Sure enough, he was spot on. The old dinosaur fired right up.
But now I need to check the charging system and every where I hook up my meter, I'm getting negative voltage readings (obviously).
Anyone have any tips for checking a positive ground charging system?
The owner wants to change the alternator, and i'm willing to bet that it will fix it, but this is new ground for me (get it?), and I'd like to able to troubleshoot it with confidence in the future.
[Last edited Jun 11, 2016 01:45:44]