HARNESS AS 1506998 - Caterpillar

Illustration 1 g01709473
Schematic of the start/stop circuit for the 315C and 318C (1) Key start switch (2) Timer relay (3) Neutral start switch (4) Neutral start relay (5) Starter control relay (6) Starter relay (7) Starter solenoid (8) Engine shutdown timer (9) Motor for starting (10) Alternator (11) Engine shutdown solenoid (12) Batteries
Illustration 2 g00695657
Schematic of the start/stop circuit for the 312C, 319C, 320C and 321C (1) Batteries (2) Alternator (3) Starter relay (4) Starter control relay (5) Governor actuator (6) Timer relay (7) Key start switch (8) Neutral start relay (9) Neutral start switch (10) Starter solenoid (11) Motor for starting
Illustration 3 g00776423
Schematic of the start/stop circuit for the 322C (1) Batteries (2) Alternator (3) Starter relay (6) Timer relay (7) Key start switch (8) Neutral start relay (9) Neutral start switch (10) Starter solenoid (11) Motor for starting
Illustration 4 g00824743
Schematic of the start/stop circuit for the 325C and 330C (18) Timer relay (19) Key start switch (20) Neutral start relay (21) Starter relay (22) Motor for starting (23) Neutral start switch (25) Engine controller (28) Fuel pump relay (29) Fuel pumpThe start/stop circuit is used to start the engine and the start/stop circuit is used to stop the engine. The following items are included in the start/stop circuit:
Starter control relay
Starter relay
Motor for starting
Timer relay
Start switch
Governor actuator
Neutral start relay
Neutral start switchThe start/stop circuit also includes a circuit for an air heater in order to help the engine start in cold weather. The circuit for the air heater includes the following items: an air heater, heater control and heater relay.Current is allowed to flow through the timer relay and the neutral start switch to the neutral start relay when the starter switch is placed in the ON position. The coil of the neutral start relay is energized. Current flows through the neutral start relay to the starter relay when the key start switch is placed in the START position. The contacts of the starter relay close and current flows to terminal "S" of the starter solenoid from the starter relay.Note: Current will not pass through the starter relay if the starter switch is placed in the ON position and the control lever is not in the LOCKED position.Current from the battery will flow through the starter solenoid to the motor for starting when the contacts of the starter solenoid are closed.Note: For the 322C, 325C, and 330C, turn the key start switch to the RUN position.After the engine has started, the alternator will begin to produce electricity. Then, the motor for starting will stop operating. This action is designed to prevent the motor for starting from rotating too fast.The timer relay will supply power for a specific amount of time after the start switch is placed in the OFF position. The cable of the governor