FRAME AS-LOADER 3814507 - Caterpillar

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Verify that the alternator "B+" terminal nut is tight and verify that the wire has a good connection to the "B+" terminal.
Many Caterpillar machines are equipped with a connector for the 6V-2150 Starting/Charging Analyzer. Use of this tester replaces the testing below.
Start the engine and set the throttle to at least 75 percent. Turn ON all electrical accessories for all test steps below. Allow the engine to run for at least 3 minutes before continuing to Step 4. The following table will assist in making calculations during this test.
Table 1
Test Step     Voltage Reading     Voltage should be below this for 12 volt system     Voltage should be below this for 24 volt system    
4        
5        
4 minus 5         1.0 volt     2.0 volts    
6                
7        
6 minus 7         0.5 volt     1.0 volt    
8         0.5 volt     1.0 volt    
Measure the voltage between the alternator "B+" terminal and the