EXTENSION- 5W2629 - Caterpillar

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The battery disconnect switch is on the left side of the machine behind the front access door.
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ON - To activate the electrical system, insert the disconnect switch key and turn the battery disconnect switch clockwise. The battery disconnect switch must be turned to the ON position before you start the engine.
OFF - To deactivate the electrical system, turn the battery disconnect switch counterclockwise to the OFF position. The battery disconnect switch operates differently than the engine start switch. When the battery disconnect switch is in the OFF position, the electrical system is disabled. When the engine start switch is turned to the OFF position and the battery disconnect switch is turned to the ON position, the battery remains connected to the entire electrical system.Turn the battery disconnect switch to the OFF position and remove the disconnect switch key when you service the electrical system or other components on the machine.Turn the battery disconnect switch to the OFF position and remove the disconnect switch key if you do not operate the machine for an extended period of a month or more. This will prevent drainage of the battery.
Never move the battery disconnect switch to the OFF position while the engine is operating. Serious damage to the electrical system could result.