EYE-LIFTING 1U9378 - Caterpillar

Machine ECM Outputs
Illustration 1 g06309358
Block Diagram of the Electronic Control System
(1) Switch panel
(2) Travel alarm
(3) Electric lifting pump
(4) Fault alarm
(5) Chassis/cab lamp relay
(6) Boom lamp relay
(7) Wiper Controller
(8) A/C clutch solenoid
(9) Machine electronic control module (ECM)
(10) Engine speed command
(11) Glow plug relay
(12) Engine shutoff solenoid
(13) 2 Pump flow combine solenoid
(14) Straight travel solenoid
(15) Swing brake solenoid
(16) Travel speed solenoid
(17) Hydraulic lock solenoid
(18) Power shift pressure PRV
(19) Flow limit pressure PRV
(20) Variable relief 1 PRV
(21) Variable relief 2 PRV
(22) ATCH stem 1 retract PRV
(23) ATCH stem 1 extend PRV
(24) ATCH stem 2 retract PRV
(25) ATCH stem 2 extend PRV
(26) ATCH stem 3 retract PRV
(27) ATCH stem 3 extend PRVStandard Solenoids
Swing Brake Solenoid
When implements and/or tools other than travel are activated, the swing brake solenoid is energized, allowing pilot oil to release the swing brake. The solenoid is de-energized when 6.5 seconds have elapsed after the pedals/levers are put into the neutral position. When the solenoid is de-energized, pilot oil is blocked and the swing brake is applied.Travel Speed Change Solenoid
This solenoid is used to change the travel speed between high (Rabbit) to low (Turtle). The travel speed is set to the low (Turtle) mode when the solenoid is de-energized.Power Shift Pressure PRV Solenoid
The Machine ECM controls the driving current for the proportional reducing valve for power shift pressure. The Machine ECM responds to inputs from the position of the engine speed dial, the engine speed, and the pump delivery pressure.Hydraulic Lock Solenoid
The hydraulic lock solenoid is an output of the machine ECM. The hydraulic lock solenoid is energized in order to enable the primary hydraulic pressure. The hydraulic lock solenoid is de-energized in order to disable the primary hydraulic pressure.Straight Travel Solenoid
The straight travel solenoid is energized to maintain straight travel even though a swing operation or implement operation is performed during travel.Switch Panel Output Components
Travel Alarm
The travel alarm sounds to alert persons in the area that the machine is moving.Fault Alarm
The alarm sounds to alert the operator when a high emergency condition is present. For example, the engine oil pressure decreases below a set value.