ELBOW 1711314 - Caterpillar

Self-Diagnostic Function
Machine ECM (1) is a self-diagnostic component. The machine ECM monitors the inputs and the outputs. The machine ECM monitors the system problems that can occur and system warnings that are generated during the operation of the machine. The machine ECM will display a system warning that is generated, or a problem that has been detected, via the self-diagnostic function on operator monitor (2).Note: A log file is kept for the warnings. The log file for machine ECM contains the time and the number of occurrences of each warning. The log file for engine ECM contains the number of occurrences of each warning but does not contain the time of occurrences of each warning.Automatic Engine Speed Control (AEC)
Illustration 2 g06330598
(1) Machine ECM
(2) Operator monitor
(4) Main hydraulic pump pressure sensor
(5) Travel levers/pedals
(6) Left/right joystick position sensorsThe Automatic Engine Speed Control (AEC) automatically reduces engine RPM when the machine is inactive. The AEC system is designed to reduce fuel consumption and noise. Lower engine speeds can also increase engine life.The engine rpm will recover automatically to the setting of the engine speed dial when any hydraulic function is activated.Hydraulic demand is detected by either lever signals or the pump discharge pressure sensor.Note: Input components related to the tool control system can detect hydraulic demand as well.Automatic Engine Speed Control is activated when the engine start switch is turned to the ON position. The AEC function can be turned from ON to OFF from the monitor.
Table 2
AEC Mode AEC State Position of Engine Speed Dial Description of Mode
First stage(1) OFF 3 to 10 Engine speed will not reduce.
Second stage ON 3 to 10 The AEC system in the electronic controller will automatically reduce the engine rpm to approximately to low idle after there has been no hydraulic demand for approximately 5 seconds.
(1) AEC not active on monitorAutomatic Travel Speed Control Function
Illustration 3 g06330600
(1) Machine ECM
(2) Operator monitor
(4) Main hydraulic pump pressure sensor
(5) Travel levers/pedals
(6) Left/right joystick position sensors
(7) Travel speed control button (RH joystick)
Illustration 4 g06330609
Travel Speed Control Button (RH Joystick)
(7) Travel speed control button (RH joystick)There are two modes of travel speed for the machine. The modes are "Tortoise" and "Rabbit". The control for the travel speed is on the right joystick. The monitor includes an indicator to display the speed function that is active.When the travel speed is set to TORTOISE, the travel speed is fixed at the low speed (no change). When the travel speed is set to RABBIT, the travel speed changes in response to the pump outlet pressure. When the main pump pressure is low, the travel speed is automatically increased to high speed. When the main pump pressure is high and the selected travel speed is RABBIT, the travel speed is automatically switched to low speed.Engine Speed Protection
Engine Idle Shutdown
Illustration 5 g06330614
(1) Machine ECM
(2) Monitor
(9) Engine start switch
(10) Hydraulic lock solenoidThe Engine Idle Shutdown function stops the engine automatically when the machine has been idle for longer than the set time. Before the engine stops, a warning message will