TM 5-3895-346-14
ENGINE OVERHAUL
ENGINE PROTECTIVE SYSTEMS
ENGINE PROTECTIVE SYSTEMS
MANUAL SHUTDOWN
A manually operated emergency engine shutdown device enables the engine operator to stop the engine in the
event an abnormal condition should arise. If the engine continues to run after the engine throttle is placed in
the no-fuel position, or if combustible liquids or gases are accidentally introduced into the combustion chamber
causing overspeeding of the engine, the shutdown device will prevent damage to the engine by cutting off the
air supply and thus stopping the engine. The shutdown device consists of an air shutoff valve mounted in the
air inlet housing and a suitable operating mechanism.
Operation
The manually operated shutdown device is operated by a knob located on the instrument panel and connected
to the air shutoff valve shaft lever by a control wire. Pulling the knob all the way out will stop the engine. Push
the knob all the way in and manually reset the air shutoff valve before starting the engine again.
Service
For disassembly and assembly of the shutdown device, refer to Air Shutdown Housing.
Figure 1. Mechanical Shutdown System Schematically Illustrated
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