Tennant 6200G, Руководство по обслуживанию

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ELECTRICAL
4-44
6200G/LP 330375 (6–99)
GAS ENGINE START AND IGNITION
The electrical components needed to start and
run the engine are:
CB–5, Key switch, Starter motor, Starter motor
relay, Throttle solenoid, Ignition coil, Spark plug,
Oil level sensor.
1. Start circuit (fig. 1)
The function of the start circuit is to engage the
start solenoid, close its contacts, activate the
throttle solenoid, and energize the starter motor
to rotate the engine crankshaft.
The main function of the start circuit is to
energize the M1 coil to close the power contacts
of the M1 main contactor. Without M1 energized,
only the horn, optional lighting and accessory
vacuum unit will operate.
2. Spark Ignition circuit (fig. 2)
The ignition coil and spark plug are the only two
electrical components used to provide ignition
spark to the engine. For the engine to run, the
key switch must be in the start or run position. If
the key switch is in the off position, the ignition
coil black wire becomes effectively grounded
through the M+ and M– contacts. If the engine
oil level is low, the oil level sensor also grounds
the ignition coil black wire causing the engine to
stop.