TUBE ASSEM. 4Y7865 - Caterpillar

Illustration 1 g01025432
Brake (remote control) circuitThe components of the brake (remote control) circuit are the remote control switch, the parking brake control module, the transmission oil pressure switch for brake application, the brake accumulator oil pressure switch for brake application, the parking brake oil pressure switch Electronic Transmission Control (ETC), the parking brake solenoids, the Power Train Electronic Control Module (Power Train ECM), the remote control logic unit, the parking brake relay, the remote control parking brake light, and the remote control parking brake oil pressure switch.
Illustration 2 g01025177
Dash panel (1) Remote control switch
Illustration 3 g01023506
Behind dash panel (2) Parking brake control module
Illustration 4 g01032246
Rear view of transmission (3) Transmission oil pressure switch for brake application
Illustration 5 g01023505
View of parking brake control valve (4) Parking brake oil pressure switch (ETC) (5) Parking brake solenoid #1 (6) Parking brake solenoid #2
Illustration 6 g01023508
Cab (7) Power Train ECMWith the key start switch in the ON position, 24 volt power is supplied from the batteries via circuit breaker #2 to the remote control switch, via circuit breaker #9 to the Power Train ECM, and via circuit breaker #10 to the parking brake control module.
Illustration 7 g01032863
View of hydraulic tank compartment (8) Remote control logic unitWith remote control switch (1) in the ON position, 24 volt power is supplied to the remote control logic unit.
Illustration 8 g01025436
Remote control logic unit (9) Service brake relay #5 (10) Automatic Brake Application (ABA) brake relay #4 (11) Parking brake relay #18 (12) First speed relay #19
Illustration 9 g01025437
Left side view of rear frame (13) Brake accumulator oil pressure switch for brake applicationWhen the parking brake switch on the transmitter is moved to the DISENGAGED position, a radio signal is sent to the receiver. The receiver sends a signal to remote control logic unit (8) energize first speed relay #19 (12), parking brake relay #18 (11). When first speed is selected on the transmitter a signal is sent to the receiver. The receiver sends a signal to the remote control logic unit to energize service brake relay #5 (9), and ABA brake relay #4 (10). A signal is then sent to parking brake control module (2). The parking brake control module will energize parking brake solenoid #1 (5) and parking brake solenoid #2 (6). The parking brakes will be disengaged.When the parking brake switch on the transmitter is moved to the ENGAGED position, the transmitter does not send a parking brake signal to the receiver. The receiver will de-energize the service brake relay #5, the ABA brake relay #4, and the parking brake relay #18. The parking brake control module will engage the parking brakes.
Illustration 10 g01033351
Rear view of cab (14) Remote control parking brake light
Illustration 11 g01033352
View of parking brake control valve (15) Remote control parking brake oil pressure switchWhen remote control switch (1) is in the ON position, 24 volt power is supplied to remote control parking brake light (14). When the brake oil pressure decreases to a preset value, the remote control parking brake pressure switch (15) contacts will close. The remote control parking