CRANKSHAFT AS 1W5009 - Caterpillar

Pressing the Emergency Stop Button may cause unburned gas to remain in the air inlet and in the exhaust manifold.
Unburned gas in the air inlet and exhaust system may ignite when the engine is started. Personal injury and/or property damage may result.Before starting an engine that may contain unburned gas, purge the unburned gas from the air inlet and exhaust system. Refer to the topic on purging unburned gas in the "Starting the Engine" section.
Emergency shutoff controls are for EMERGENCY use ONLY. DO NOT use emergency shutoff devices or controls for normal stopping procedure.
Ensure that any system that provides external support to the engine is secured after the engine is stopped.
Do not start the engine until the problem necessitating the emergency stop has been located and corrected.
Emergency Stop Button
Illustration 1 g00786734
(1) Emergency stop button on a junction box
Illustration 2 g00786735
Remote control panel (status)
(1) Emergency stop button
(2) Engine control switch
(3) "AUXILIARY SHUTDOWN" indicator
Illustration 3 g06297146
Control panel
(1) Emergency stop buttonEmergency stop button (1) is in the OUT position for normal engine operation. Push the button for emergency stopping which shuts off both the fuel and the ignition. The engine will not start when the button is locked. To reset the button, turn the button clockwise. The spring-loaded button will return to the OUT position.The control panel must be reset before the engine will start. To reset the control panel, turn engine control switch (2) to the "OFF/RESET" position.Note: For more information and illustrations on the control panel shutoff, refer to this Operation and Maintenance Manual, Alarms and Shutoffs.The customer may also provide other means for emergency stopping. Emergency stopping will cause the fuel to be shut off, but the ignition may not be shut off. This shutdown will cause "AUXILIARY SHUTDOWN" indicator (3) to illuminate. The control panel must be reset before the engine will start. To reset the control panel, turn engine control switch (2) to the "OFF/RESET" position.