Peterbilt 587 starting
12-11-2023, (Subject: Peterbilt 587 starting ) 
Post: #10
RE: Peterbilt 587 starting
It seems like once it drops to 12.5v and less then it starts acting up
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12-18-2023, (Subject: Peterbilt 587 starting ) 
Post: #11
RE: Peterbilt 587 starting
(12-11-2023 )Samj Wrote:  It seems like once it drops to 12.5v and less then it starts acting up

Did you find the cause of your problem or are you still having an issue? Voltage-wise you really shouldn't have an issue cranking until the resting/non-cranking voltage drops below 12.1 or so and even then a resting voltage of about 11.8v or better should still turn it over while only sounding a bit sluggish (assuming you have the same 4 battery setup that my 2012 587 has).


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 Thanks given by: hhow55
12-18-2023, (Subject: Peterbilt 587 starting ) 
Post: #12
RE: Peterbilt 587 starting
I'm thinking a bad starter.......


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