I am used to a mack that the volts when running is 14.0 volts on my 01 western star the volts when running is 12.9 to 13.0 is that still ok range or should it be more towards the 14.0
Alternator charge
Discussion in 'Trucks [ Eighteen Wheelers ]' started by stark21, Sep 4, 2010.
Page 1 of 2
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
I'm not familiar with every set up, but that seems on the low side to me. Where are you taking your readings while running, the back of the alternator, or at the batteries?
-
Shouldn't it be around 14.6 volts?
-
I am going by what the computer display shows when truck is running.. book says 12.5 to 14.2 is normal but just not sure since the batteries on this truck uses 4 but not hooked up together so it's a 24V system
-
-
I had kinda the same problem on a Volvo 780..The alternator was 5 years old so I changed it and the local electric rebuild shop put an external wire for the regulator...I had to run a wire for the alternator to the battery so now the alternator regulator senses battery voltage rather than alternator output...Holds the batterys at 13.8 to 14.0 VDC....
-
ok I will check with volt meter and check that way.. truck has no issue starting as it starts fine and yeah when running I get 12.8 to 13.0 but I will test directly on batteries and alternator with everything turned on. I also could clean the terminals on batteries too that would help
-
best thing to do is get a digital multimeter and check it out ground the neg lead and put the pos lead on the pos output of the alternator see what your reading is then go to your batteries and ground the neg lead and hit the pos to the pos post of the batt see if there is a resistance in there there shold be no more than .02 volt between teh alt and the batts if more than that then chances are you have loose or coroded connections somewhere voltage should be between 14 and 14.8 no higher than that though when running when the engine isnt runnin it will be around 12.8 anything passed 12.2 batts prolly dead
-
The last 24v system I had was on a 70's vintage Freightliner... -
there are no trucks other than military built after 86 that are 24 volt...
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 1 of 2