Precautions For Arc Welding - Mitsubishi 6M60-TL Service Manual

PRECAUTIONS FOR MAINTENANCE OPERATION

4. Precautions for Arc Welding

• When arc welding is performed, current from the welder flows to ground via the machine metal parts. Unless ap-
propriate steps are taken, this current can damage control units, other electrical devices and wiring harnesses.
And any electrical device near the point on the vehicle to which the (–) cable of the welder is connected, might be
largely damaged.
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• The current of the welder will flow backward through the bat-
tery's (–) cable and damage the battery and electrical systems
directly connected to the battery. Be sure to disconnect the bat-
tery's (–) cable in the following procedure.
• Turn the battery switch to the LOCK position.
• Turn the starter switch to the LOCK position.
• Disconnect the battery's (–) cable.
• Cover all parts of the machine that may be damaged by welding
sparks.
• Connect the welder's (–) cable to the machine as close as possi-
ble to the area being welded.
• Set the welding current in accordance with the part being weld-
ed.