TUBE AS 1211338 - Caterpillar

Illustration 1 g02723830
M300D Electronic Control System
(View A) Inside CAB
(View B) Outside CAB
(A) Electronic Technician
(B) Service port
(C) HEDC SPM
(D) Key Reader MSS Tornado
(E) Monitor
(F) Machine Control A4:M1
(G) Attachment Control A5:M2
(H) Engine Control A4:E2
(I) Product Link 522
(J) CAT Data Link
(K) Can A J1939
(L) Can B Master Slave Control The standard electronic control system consists of the following components:
Machine ECM
Engine ECM
Monitor
Soft switch panel
Various switches, sensors and output devicesThe PL522 enables the customer to receive the following information: SMH (Service Meter Hours), location, diagnostic codes, events and other Cat Data Link (CDL) information.The electronic control system controls many of the hydraulic system functions on M300D Excavators. The pilot functions that are controlled by the electronic control system include the following functions:
Regulate hydraulic horsepower.
Lock and unlock the oscillating axle.
Control the hydraulic lockout function.
Control travel activation and travel lock
Automatic Engine Speed Control (AESC)
Control engagement of the parking brake.
Transmission shifting
Control the flow and pressure from the optional combined function valve.The operator can select two different power modes in order to match the output of the main pump to the hydraulic demand. The machines are equipped with the following power modes: Economy and Power. Economy mode is used for applications that are light duty such as grading or positioning. Power mode provides maximum hydraulic power and high operating speed. This mode is used for the following applications: truck loading, trenching and hydraulic hammer. Travel mode is automatically active if the travel pedal is depressed. This mode provides a drawbar pull that is maximum and maximum speed.Under normal conditions, the pump is regulated by the engine speed that is selected by the operator. The electronic control system limits the output of the hydraulic pumps to Economy Mode under any of the following conditions:
The limp home mode is activated.
The air filter differential pressure switch is closed.
The air inlet temperature is above 79 °C (174 °F).
The hydraulic oil temperature is above 93 °C (200 °F) or below 14 °C (57 °F).
The engine coolant is above 112 °C (234 °F).
The hydraulic oil filter is plugged.