GASKET-COMBUSTION 1732669 - Caterpillar

Machine ECM Outputs
Illustration 1 g03745064
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) Starter relay (13) Engine shutoff solenoid (14) 2 Pump flow combine solenoid (15) Swing brake solenoid (16) Travel speed solenoid (17) Hydraulic lock solenoid (18) Power shift pressure PRV (19) 2 Way lever change solenoid (20) Flow limit pressure PRV (21) Variable relief 1 PRV (22) Variable relief 2 PRV (23) ATCH stem 1 retract PRV (24) ATCH stem 1 extend PRV (25) ATCH stem 3 retract PRV (26) ATCH stem 3 extend PRV (27) ATCH Quick Coupler SolenoidStandard 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.Switch Panel Output Components
Illustration 2 g03745205
Switch Panel, located to the right of the operator. (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 (27) ATCH Quick Coupler SolenoidQuick Coupler Solenoid
The "Quick Coupler" Function provides the operator a quick method of changing attachments. The request for "Quick Coupler" LOCK or UNLOCK is selected from the Quick Coupler Menu option in the Monitor. 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.