GEAR-DIFFERENTIAL RING 5T8684 - Caterpillar

Power Distribution
Illustration 1 g06023701
Sidecutter Electrical Schematic
(1) From options ECM fuse
(2) From machine key switch
(3) From engine controls fuse
(4) From water spray fuse
(5) From machine ECM fuse
(6) Water pump relay
(7) Machine ECM
(8) CAN resistor "1"
(9) Propel lever
(10) Display
(11) Options ECM
(12) CAN resistor "2"
(13) Diode block "2"
(14) Sidecutter spray solenoid
(15) Tire water spray solenoid
(16) Diode block "1"
(17) Sidecutter down solenoid
(18) Sidecutter up solenoid
(19) Water pump and motor groupWhen the electrical disconnect switch is in the ON position, power is delivered to the machine ECM fuse. Power transfers from machine ECM fuse (5) to terminals
"2"
"47"
"48"
"49"
"50"of the machine ECM. The machine ECM is grounded at terminal "1".When the engine start switch is in the ON position and the machine main relay is energized, power is available from
options ECM fuse (1)
from engine controls fuse (3)
from water spray fuse (4.)Power transfers from options ECM fuse (1) to terminals "C1-2" and "C-12" of options ECM (11). This voltage provides the main power source for the option ECM. The options ECM is grounded at terminal "C1-1".Power transfers from water spray fuse (4) to contact "30" of water pump relay (6).Power transfers from engine controls fuse (3) to contact "2" of propel lever (9) and contact "2" of display (10).CAN Communication
Machine ECM (7)
propel lever (9)
display (10)
options ECM (11)communicate through the CAN lines.To prevent data loss in the communication lines, termination resistors are required at the ends of the CAN bus. CAN resistors (8) and (12) act as termination resistors. The CAN resistors absorb unwanted noise in the communication system which can result in abnormal machine operation.Differences in materials along the CAN bus can cause data pulses in the bus to reflect back through the bus. This reflection, also known as "jitter", creates unwanted noise in the CAN bus. Jitter in the communication lines between computers can distort the original data signals. The distortion can result in data loss.Data in the CAN bus can also be contaminated with radio frequency interference (RFI). This interference can be caused by a number of devices which operate on or near the machine. RFI creates noise in the communication lines which can also distort the original data signals and cause data loss.Sidecutter Controls
Options ECM (11) monitors signals from propel lever (9) to determine the status of the sidecutter control switches. When either of the sidecutter up or down switches is held for more than one second, the sidecutter system is enabled.The sidecutter system is disabled under any of the following conditions:
During machine startup
The parking brake is engaged.
The propel system is disabled.
The machine is in reverse.
The sidecutter system is faulted.When the machine determines that the sidecutter system is enabled and the sidecutter up switch is pressed, the options ECM energizes sidecutter up solenoid (18). When the machine determines that the sidecutter down switch is pressed while the system is enabled, the options ECM energizes sidecutter down solenoid (17).When propel lever (9) is moved into the reverse range, an auto-up signal is generated for the sidecutter control. In this case, sidecutter up solenoid (18) is