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deucjok
Member

4440 alternator problem

My 4440 keeps ruining alternators. They will work fine for a while, then they start over charging.  The last one ruined the batteries.  I've been through three alternators in the last two years.  The first two were Delco, and the one in it now is a nippo denso,  and it is getting ready to go the trip.  Any help would be greatly appreciated.

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r3020
Senior Contributor

Re: 4440 alternator problem

Bad ground cable can cause that problem. Check where the ground cable connects to the tractor.

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