EJECTOR BUCKET ARRANGEMENT 7K6973 - Caterpillar

Ether Injection System
Note: This system is an optional feature.The ECM automatically injects ether into the air inlet manifold when the following conditions are met:
The engine rpm is between 50 and 400 rpm.
The jacket water coolant temperature is less than 21 °C (70 °F).The duration of ether injection varies linearly with the jacket water coolant temperature. The duration of ether injection varies within the following range:
15 seconds at the maximum temperature of 21 °C (70 °F)
130 seconds at the minimum temperature of −40 °C (−40 °F)The longest duration of ether injection is 130 seconds even if the jacket water coolant temperature is less than −40 °C (−40 °F). See Illustration 1.
Illustration 1 g00749824
The temperature of the jacket water and duration of ether injection (Y) Temperature in °C (X) Time in secondsA switch enables the operator to inject ether manually. This situation can occur when the following conditions are met:
The switch for ether injection is in the manual position.
The engine rpm is more than 50 rpm.
The jacket water coolant temperature is less than 21 °C (70 °F).Air Shutoff
Note: This system is an optional feature.The air shutoff uses a plate that rotates on a shaft in order to shut off inlet air to the aftercooler. The engine stops because of the restricted air supply to the combustion chamber. The air shutoff only actuates for the following conditions:
The Emergency Stop button is pressed.
An overspeed shutdown occurs.Cold Mode Cylinder Cutout
Note: This system is an optional feature.The Cold Mode Cylinder Cutout provides the following benefits:
Reduce the white smoke for cold starting.
Minimize the duration of advanced timing (cold mode).
Reduce the use of ether injection.The ECM automatically turns off one electronic unit injector at a time during the following occurrences:
Cold start-up
Extended time at low idleThe ECM monitors the change of the fuel rack in order to determine if a cylinder is firing. If the cylinder is firing, the ECM activates the electronic unit injector. If the cylinder is not firing, the electronic unit injector remains deactivated. This process reduces white smoke.The following conditions must be met in order to activate the Cold Mode Cylinder Cutout strategy:
The Cold Mode Cylinder Cutout parameter is programmed to "ENABLE".
The engine rpm is equal to high idle rpm or less than high idle rpm.
The fuel rack is less than 13 mm (.5 inch).
The jacket water coolant temperature is less than 63 °C (145 °F).The Cold Mode Cylinder Cutout strategy is activated under either of the following conditions:
Ten seconds after the engine reaches the low idle rpm
Three seconds after ether injection is completedThe following conditions will deactivate the Cold Mode Cylinder Cutout strategy:
The Cold Mode Cylinder Cutout parameter is programmed to "DISABLED".
The jacket water coolant temperature is more than 70 °C (158 °F).
The ET service tool is used for the cylinder cutout test.
The ether injection system is used.
The coolant temperature sensor has failed.
The engine is operating at a certain rpm when the Cold Mode Cylinder Cutout is activated. If the engine rpm then varies by more than 50 rpm, the feature is deactivated