YOKE ASSEM. 6K4597 - Caterpillar

Most of the tests of the electrical system can be done on the engine. The wiring insulation must be in good condition. The wire and cable connections must be clean, and both components must be tight.
Never disconnect any charging unit circuit or battery circuit cable from the battery when the charging unit is operated. A spark can cause an explosion from the flammable vapor mixture of hydrogen and oxygen that is released from the electrolyte through the battery outlets. Injury to personnel can be the result.
The battery circuit is an electrical load on the charging unit. The load is variable because of the condition of the charge in the battery.
The charging unit will be damaged if the connections between the battery and the charging unit are broken while the battery is being charged. Damage occurs because the load from the battery is lost and because there is an increase in charging voltage. High voltage will damage the charging unit, the regulator, and other electrical components.
Illustration 1 g02231076
177-2330 Battery Analyzer
Refer to Operating Manual, NEHS0764, "Using the 177-2330 Battery Analyzer" for detailed instruction on the use of the 177-2330 Battery Analyzer
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4C-4911 Battery Load Tester
Refer to Operating Manual, SEHS9249, "Use of 4C-4911 Battery Load Tester for 6 V, 8 V, and 12 V Lead Acid Batteries" for detailed instruction on the use of the 4C-4911 Battery Load Tester.Use the 4C-4911 Battery Load Tester or the 177-2330 Battery Analyzer to test a battery that does not maintain a charge when the battery is active. The 4C-4911 Battery Load Tester and the 177-2330 Battery Analyzer are portable units. The 4C-4911 Battery Load Tester or the 177-2330 Battery Analyzer can be used under field conditions and under high temperatures.
Check the voltage of the battery.
If the voltage is above 12.45 V, then the battery is good.
If the voltage of the battery is below 12 V, then the battery needs replaced.
If the voltage of the battery is between 12 V to 12.3 V, then run the machine at mid-throttle for 60 minutes and recheck the battery voltage. If the voltage is not above 12.45 V, then replace the battery.
If the voltage of the battery is between 12.3 V to 12.45 V, then run the machine at mid-throttle for 30 minutes and recheck the battery voltage. If the voltage is not above 12.45 V, then replace the battery.