Maintaince free batteries on my CAT, kind hard to check liquid reading. Test the voltage across both batteries with the engine running and you should have 28 vo!ts, if not you have bad batteries or a bad alternator or really bad connections.
Posted 22:07 (#4735126 - in reply to #4735047) Subject: RE: 24V charging systemĢ4 volt system should charge at about 28.0 to 28.5 volts.
This "secondary" ground will cause the 1st battery to accept more charge also. Also, perhaps you have a 12 volt accessory that takes it's ground off of the 1st batteries negative terminal. I've already found the connecting cable itself on several occasions to be bad and test high in resistance. A poor connection will create a point of high resistance to electron flow, thus impeding the charge of the second battery. If the batteries test ok, then next check your cable that connects the batteries in series. The specific gravity of the water will be far less on the dead cell. As soon as you pull the acid out of the bad cell, you will notice the acid is very dark. The only SURE way to test the batteries for a weak or dead cell is with a hydrometer. The new CAT batteries have more CCA's than the old batteries, probably weighed over 100 lbs, each. That just happened on my D6D, shut down for lunch, would not even click when I went to start it after lunch, bad battery checked 10 + volts, good one tested over 12. Maybe you have a dead cell in one of them Take the cables off and test each one separately with your voltmeter. Does anyone have a simple diagram for me to check why we aren't getting charge in both batteries. With the engine running one battery will show 12.6 V or so across the posts and the other only shows about 11.8. We have problems with it charging both batteries. It's a 645b fiat allis but it is a 24V system with 2 12V batteries tied together to make 24V. Guys - having issues with our payloader keeping both batteries charged. ( logon | register )Ģ4V charging system Jump to page : 1 Now viewing page 1
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