HINGE & BEARING AS 1268751 - Caterpillar

Truck Hitch, Auger Lift, Apron Fold, and Hopper Circuits
Illustration 4 g01576415
Power Distribution (1) "B+" from relay (2) Auger lift switch (main screed operator station) (3) Left hopper switch (4) "R" from engine start switch (5) Right hopper switch (6) Apron fold switch (7) Connector for the screed (8) Screed ECM (9) Circuit breaker for the screed (10) Circuit breaker for limp home mode (11) Auger lift switch (instrument panel) (12) Circuit breaker for screed ECM (13) Operator control unit (14) Circuit breaker for operator ECM (15) Circuit breaker for machine ECM (16) "B+" from main circuit breaker (17) Solenoid for raising the apron fold (18) Machine ECM (19) Solenoid for lowering the apron fold (20) Solenoid for lowering the auger (21) Solenoid for raising the auger (22) Solenoid for opening the left hopper (23) Solenoid for closing the left hopper (24) Solenoid for opening the right hopper (25) Solenoid for closing the right hopperWhen the electrical disconnect switch is in the ON position, power transfers from the main circuit breaker to the following circuit breakers: circuit breaker for the operator ECM, circuit breaker for the machine ECM and circuit breaker for the screed ECM.The circuit breaker for the operator ECM transfers power to the following terminals of the operator control unit: terminal "J1-31", terminal "J1-39" and terminal "J1-47". The operator control unit is grounded at the following terminals: terminal "J1-13", terminal "J1-23" and terminal "J1-57".The circuit breaker for the machine ECM transfers power to the following terminals of the machine ECM: "J1-31", "J1-39" and "J1-47". The machine ECM is grounded at the following terminals: "J1-13", "J1-23" and "J1-57".The circuit breaker for the screed ECM transfers power to terminal "J1-31" and "J1-39" of the screed ECM. The screed ECM is grounded at terminal "J1-13".When the engine start switch is in the ON position, power transfers from the main relay to the circuit breaker for the screed and to the circuit breaker for limp home mode. The circuit breaker for the screed transfers power to terminal "J1-1" of the screed ECM. The circuit breaker for limp home mode transfers power to terminal "J1-1" of the machine ECM. These voltage inputs provide wakeup signals to the machine ECM and to the screed ECM.When the engine start switch is in the ON position, power transfers from contact "R" of the switch to terminal "J1-1" of the operator control unit. This voltage input provides the wakeup signal to the operator control unit.The operator control unit provides a common ground path at terminal "J1-60"for the following components:
Auger lift solenoid
Auger lower solenoidThe operator control unit monitors the circuits at terminal "J2-46" and terminal "J2-47" in order to determine the position of the left hopper switch.The operator control unit determines that the left hopper switch is in the HOLD position when a floating signal is read at terminal "J2-46" and at terminal "J2-47".The operator control unit determines that the left hopper switch is in the CLOSE position when a ground signal is read at terminal "J2-46". This