Komatsu PC78US-6 Operation & Maintenance Manual page 116

MACHINE OPERATIONS AND CONTROLS
If the fuses frequently blow or if there are traces of short circuits on the electrical wiring, locate the cause immediately and carry
out repairs, or contact your Komatsu distributor for repairs.
Keep the top surface of the battery clean and check the breather hole in the battery cap. If it is clogged with dirt or dust, wash
the battery cap to clean the breather hole.
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OPERATION