7G7889 Alternator (12V 60A) NOTE: Load the battery with a carbon pile (4C4911 Battery Load Tester) to get the maximum alternator output. Polarity … Negative…

6N3161 12V (Motorola Number 8RD2018) Polarity is negative ground or insulated. Voltage setting range … 13.2 to 14.4 V (1) Remove cap to adjust voltage.…

(1) Output terminal. (2) Nut. Polarity is negative ground.

Illustration 1 g00624846 Front View of the 30-SI Alternator Illustration 2 g00624845 Side View of the 30-SI Alternator Illustration 3 g00624843 Rear View of the…

Illustration 1 g00620646 Front View of the 26-SI Alternator Illustration 2 g00620650 Side View of the 26-SI Alternator Illustration 3 g00620651 Rear View of the…

Troubleshooting To reduce troubleshooting difficulty, find the problem in the Problem List that best describes the fault that is occurring. To make a repair to…

Stator Check the resistance that is between each of the phases. Measure the resistance between the end of each lead wire and neutral point. The…

Verify that the nut for the “B+” terminal is tight. Verify that the wire has a good connection to the “B+” terminal. Many Caterpillar machines…

Make sure that every electrical component is turned OFF. Make sure that the keyswitch is turned OFF. Make sure that the dome lights are OFF.…

Check the condition of the alternator drive belt. If the drive belt is oily, clean the pulleys. Replace the drive belt, and retest the system.…