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Diesel Generator Operation Manual GENERAL MAINTENANCE Part 11
DC Electrical System
6.11 DC Electrical System
Check the terminals on the batteries for clean and tight connections. Loose or corroded connections create resistance, which can hinder starting. Use insulated tools when disconnecting battery cables. Clean and reconnect the battery cables if loose. Always disconnect both ends of the negative battery cable. Reconnect one end of the cable to the negative battery terminal and the other end to ground. This will ensure that any arcing will be away from the battery and least likely to ignite explosive battery gases.
WARNING: IGNITION OF EXPLOSIVE BATTERY GASES CAN CAUSE SEVERE PERSONAL INJURY. DO NOT SMOKE, DO NOT USE NAKED FLAMES OR CAUSE SPARKS WHILE SERVICING BATTERIES.
Refer to Supplementary Publication 0908-0101-00 for cleaning and safety precautions of the battery