Quantcast SCHEMATIC NO. 6 (ENGINE COOLANT TEMPERATURE CIRCUIT) (Low Speed Range Shown)

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HYDRAMECHANICAL PROTECTIVE SYSTEM
SYSTEMS OPERATION
SCHEMATIC NO. 6 (ENGINE COOLANT TEMPERATURE CIRCUIT)
(Low Speed Range Shown)
1. Selector valve. 2. Low speed oil protection valve. 4. Diverter valve orifice. 7. Diverter valve. 8. Fuel shutoff
actuator. 9. Thermostatic pilot valve. 10. High speed oil protection valve. 15. Fuel shutoff sequence valve.
HIGH, ENGINE COOLANT TEMPERATURE
CIRCUIT (NORMAL CONDITIONS)
Make Reference to Schematic No. 6
Under high coolant temperature conditions, the low
engine oil pressure circuits are used to shutdown an
engine. The schematic shows the low speed range
engine oil pressure circuit in use and the coolant
temperature circuit added to the engine oil pressure
line.
Engine  temperature  is  normal  and
thermostatic pilot valve (9) is closed.
Oil flow through the system is the same as in the low
and high speed range of the LOW ENGINE OIL
PRESSURE CIRCUIT.
NOTE: The sensor of the thermostatic pilot valve (9)
must be below the water level in the coolant manifold
to operate.
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