Section 5
ENGINE DC CONTROL SYSTEM
SHEATH | ASBESTOS | BODY | NUT |
|
|
| |
MAGNESIUM |
| INSULATING | |
OXIDE |
| ||
POWDER |
| BUSHING | |
|
|
| CENTER |
|
|
| ELECTRODE |
Figure |
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ENGINE PROTECTIVE DEVICES
The engine will shut down automatically in the event of anyone or more of the following occurrences:
•Low oil
•High engine coolant temperature
•Engine overspeed
LOW OIL PRESSURE SWITCH
HIGH COOLANT TEMPERATURE SWITCH
The high coolant temperature switch has normally open contacts. This switch is immersed in engine coolant. If the coolant temperature should exceed
Figure 5-13. – High Coolant Temperature Switch
OVERSPEED PROTECTION
The oil pressure switch has
ADAPTER
LOW OIL
PRESSURE
SWITCH
Generator A/C frequency signals are delivered to Terminals 5 and 6 of the engine control circuit board via wires 22 and 44. Should engine/generator speed exceed 69 to 71 Hertz for longer than 4 seconds, the circuit board will cause an engine shutdown.
Figure
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