Volvo Penta D3 Operator's Manual page 105

Maintenance
Electrical Welding
Remove the positive and negative cables from the bat-
teries, then disconnect all cables connected to the
alternator.
Always connect the welder ground clamp to the com-
ponent to be welded, and as close as possible to the
weld site. The clamp must never be connected to the
engine or in such a way that current can pass through
a bearing.
Also remove the connector for the EVC system from
the control unit. Press the locking arm down and pull
out the connector.
IMPORTANT!
After finished welding, re-connect the EVC connector
and the alternator terminals before connecting the bat-
tery cables.
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