Engine System - Petrol (Gasoline)208Service Manual – H aram Captor IIEngine Protection ModesThe engine will be shut off in the event that it overheats or loses oil pressure after it has been running. Themain machine controller will display a warning message to the operator for either case and will also initiatean engine shut down as a back up measure.In the case of lost oil pressure, the Woodward L series actuator disables the ignition system by de-energizingthe Ignition Request relay.In the case of the engine overheating, the high coolant temperature shut down relay shuts the engine off byremoving power from the fuel pump causing the engine to run out of fuel and stall.Engine Overheat Shutdown• If the engine overheats, the temperature switch closes. This completes a path to ground for the highcoolant temp shut down relay and energizes the relay. This removes power from the fuel pump. This doesnot shut the engine down immediately, but allows the engine to use up the fuel in the carburetor floatbowl before stalling due to lack of fuel.• The main machine controller monitors the engine coolant temperature by sending out a 5v feed throughan internal resistor to the temperature switch. When the switch closes the voltage on the switch sidedrops from 5v to 0v . In response, the main machine controller sets an overheat code and alerts theoperator. After a 5 second delay, it removes the 12v Ignition request signal. If the engine has not alreadyshut down, the system will then shut down as if the operator had shut off the key (Normal engine shutoff).10AIGN. REQUEST15AMAIN5ACONTROLLERUNUSEDUNUSEDUNUSED UNUSED UNUSEDUNUSEDWOODWARDFUEL LOCK-OFFSOLENOIDN3 -0342 ORFUEL PUMPOIL SWITCH(OPEN FORPRESSURE)TEMP. SWITCH(OPEN FORNORMAL TEMP.)SHIELDED WIRERUN ENABLE SIGNALSHUTDOWN SIGNALCRANK REQUEST - BLU /PNK 16IGNITION REQUEST - PNK 16ENGINE RUN (12V INPUT) - GRY 16HIGH COOLANT TEMP. (GROUND INPUT) - GRN /YEL 16SPEED 2 (12V OUTPUT) - RED 16SPEED 3 (12V OUTPUT) - BLACK 16MAGNETICPICK-UP(Engine RPMSensor)STARTERBATTERYALTERNATORIGNITION POWERFOR IGNITERIGNITION CONNECTORFOR PLUGGING INTOKUBOTA IGNITION HARNESSKUBOTAFUELSOLENOIDEG551 -44790SPEED 2 (12V OUTPUT)GRY /BLU 16SPEED 3 (12V OUTPUT)GRY /ORG 16SHIELDED WIREWOODWARDAUTO CHOKESOLENOIDSA-4741BLU/LTGRN 16HIGH COOLANT TEMP.SHUTDOWN RELAY1 5 432BLK16CONTROLRELAY1 5 432BLK 16IGNITIONREQUEST RELAY1 5 432RED18POWERRELAY1 5 432RED 14LOW OIL PRESS.SHUTDOWNRELAY1 5 432AEES RN65127FUSE & RELAYBLOCK ASSYCRANKREQUESTRELAYBLK/ WHT 16RED/ GRN 16YEL 16SRPNMLFEDCBAKJHGSRPNMLFEDCBAKJHGCONNECTOR # 1PACKARD 16 PIN MALEP/N 15326863(TO NILFISK HARNESS)CONNECTOR #2PACKARD 16 PIN FEMALEP/N 15326868(TO NILFISK HARNESS)WOODWARDL-SERIESACTUATORDEUTSCHCONNECTORDT06 -12SARED 18TO PIN ABLK18BLK 18TO PIN BBLK/WHT 16BLK/WHT 16GRY /BLU 16GRY /ORG 16RED/BLK14RED/BLK 14RED/BLK 16LT BLU 16LT BLU16GRY/RED 16GRY /RED 16GRY /RED 16GRY 16GRY 16GRY 16GRY 16GRY16GRY 16GRN 16BLK 16RED/ GRN 16RED/ GRN 16PNK /GRN 16PNK /GRN16PNK /GRN 16PNK /BLU 16PNK /BLU 16PNK /BLU 16 PNK /BLU 16 PNK /BLU 16PNK /BLK 16PNK /BLU 16PUR 16PUR 16GRY /WHT 161 2 310k10k0.047μF0.047μFRED 16BLACK 16DT04 -6PFUEL SELECTCONNECTORCT00023DT06 -6S (BLACK)GASOLINE PLUGCT00024DT06 -6S (GREY)PROPANE PLUGFUEL PUMP (+) - PNK /YEL 16
