DETROIT DIESEL
Engine Equipment
ENGINE PROTECTIVE SYSTEMS
MANUAL SHUT-DOWN SYSTEM
The shut-down device consists of an air shut-off valve
The manually operated emergency engine shut-down
mounted in the air inlet housing which is retained in the
device, mounted in the air inlet housing, is used to stop
open position by a latch. A cable assembly is used to
the engine in the event an abnormal condition should
remotely trip the latch. Pulling the emergency shutdown
arise. If the engine continues to run after the engine
knob all the way out will stop the engine. After the
throttle is placed in the no-fuel position, or if combustible
engine stops, the emergency shut-down knob must be
liquids or gases are accidentally introduced into the
pushed all the way in and the air shut-off valve manually
combustion chamber causing overspeeding of the
reset before the engine can be started again.
engine, the shut-down device will prevent damage to the
engine by cutting off the air supply and thus stopping the
engine.
AUTOMATIC MECHANICAL SHUT-DOWN SYSTEM
sensing valve is placed against one end of the copper
The automatic mechanical shut-down system illustrated
plug, and the other end of the plug extends into the
in Fig. 2 is designed to stop the engine if there is a loss
exhaust manifold. Engine coolant is directed through
of oil pressure, loss of engine coolant, overheating of
the adaptor and passes over the power element of the
the engine coolant, or over-speeding of the engine.
valve. Engine oil, under pressure, is directed through a
Engine oil pressure is utilized to activate the
restricted fitting to the temperature-sensing valve and to
components of the system.
an oil pressure actuated bellows located on the air inlet
housing.
A coolant temperature-sensing valve and an adaptor
and copper plug assembly are mounted on the exhaust
manifold outlet. The power element of the temperature-
Fig. 2. Mechanical Shut-Down System Schematically Illustrated
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