Lincoln Electric CLASSIC III SVM 137-A - Manual (Page 55)

THEORY OF OPERATION
E-3 E-3
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BATTERY, STARTER, ENGINE
ALTERNATOR AND OIL SWITCH
CIRCUIT (CLASSIC III)
The 12VDC battery powers the starter motor and,
through the ignition switch, the engine ignition and fuel
shutoff solenoid.
The engine alternator supplies
“charging” current for the battery circuit. If the oil pres-
sure switch does not close, due to low oil pressure or
inadequate oil supply, the oil pressure light will not
glow, the hour meter will not operate and the engine
alternator and automatic idler will not function
FIGURE E.2a – BATTERY, STARTER, ENGINE ALTERNATOR AND OIL SWITCH CIRCUIT (CLASSIC III)
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.