Kubota Engine Training WG 1605 spark ignited KUBOTA

Kubota Engine Training: WG 1605, spark ignited KUBOTA ENGINE AMERICA Service Training

WG 1605 Engine Training: v. System Overviews v. Mechanical Components v. Electronic Components and Sensors v. Operation v. Service Tool KUBOTA ENGINE AMERICA Service Training

Fuel System Overview: KUBOTA ENGINE AMERICA Service Training

Mechanical Components: v. WG 1605 engines are similar to V 1505. v. Some differences include: § § § Intake and exhaust manifolds. Positive Crankcase Ventilation system. Pistons. Cylinder heads and valves. Crankcase, Camshaft. KUBOTA ENGINE AMERICA Service Training

Intake & Exhaust Manifolds: Intake manifolds use longer runners Exhaust manifolds are shielded and engineered for higher temperatures KUBOTA ENGINE AMERICA Service Training

Positive Crankcase Ventilation (PCV) System: PCV Valve Controls amount of blow-by gas and fresh air. KUBOTA ENGINE AMERICA Service Training

Flywheel: The WG 1605 flywheel is designed to work alongside the crankshaft sensor. KUBOTA ENGINE AMERICA Service Training

Fuel Delivery Pipe and Injectors: ECU controlled fuel delivery (pulse width modulated). Port Fuel Injection Fuel Pressure 40 – 45 PSI* *(can fluctuate between 35 -75#) KUBOTA ENGINE AMERICA Service Training

Fuel Delivery Pipe and Injectors: KUBOTA ENGINE AMERICA Service Training

Three Way Catalyst: A 3 -way catalyst oxidizes: (1) HC CO 2 and H 20 (2) CO 2 (3) NOx N 2 KUBOTA ENGINE AMERICA Service Training

Electronic Control Unit, ECU: Utilizes inputs from the engine sensors to precisely meter fuel, control speed and remain emission compliant. KUBOTA ENGINE AMERICA Service Training

Electronic Control Unit, ECU: KUBOTA ENGINE AMERICA Service Training

Ignition Coil: ECU controlled inductive coils. As primary windings dwell then collapse, the secondary windings yield a high voltage output via the spark plug. KUBOTA ENGINE AMERICA Service Training

Gasoline System: v Fuel lines are bold black color. v Electrical circuits are thick black. KUBOTA ENGINE AMERICA Service Training

Electric Fuel Pump: Variable controlled by ECU. KUBOTA ENGINE AMERICA Service Training

Electric Fuel Pump: KUBOTA ENGINE AMERICA Service Training

Fuel Pressure Manifold, FPM: Outlet Press/Temp Sensor Return Inlet Manifold KUBOTA ENGINE AMERICA Service Training

Dual Stage Regulator, DSR: Regulator performs 2 functions: Fuel Inlet Vaporizes liquid fuel Regulates fuel pressure Only maintenance is periodic draining See maintenance schedule Coolant Primary Test Port Secondary Fuel Outlet KUBOTA ENGINE AMERICA Service Training

DEPR (Direct Electronic Pressure Regulator): Stand alone module Controlled via CAN from ECU Contains: Control Module Pressure/Temp. sensor Fast acting solenoid valve KUBOTA ENGINE AMERICA Service Training

Engine Coolant Temperature: KUBOTA ENGINE AMERICA Service Training

Oil Pressure Switch: If oil pressure falls below specification, the warning lamp will illuminate. (ECU pin 35) Note: water ingress may also cause the contacts to corrode and cause false illumination, especially with LEDs. KUBOTA ENGINE AMERICA Service Training

Oil Pressure Switch: Standard Kubota Oil Pressure Switch: Closed: 0 -7 psi Open > 7 psi KUBOTA ENGINE AMERICA Service Training

Electronic Throttle Body, ETB ECU controlled, electronic motor driven mechanical throttle body connected to the intake. KUBOTA ENGINE AMERICA Service Training

Electronic Throttle Body, ETB v Electric motor connected to throttle. v ECU controlled based on foot pedal input. KUBOTA ENGINE AMERICA Service Training

Oxygen (O 2) Sensor: Pre and Post catalyst feedback control for precise air-fuel ratio management. 4 wire sensor including heater. KUBOTA ENGINE AMERICA Service Training

Oxygen (O 2) Sensor: Pre- and Post-Catalyst Oxygen sensors KUBOTA ENGINE AMERICA Service Training

Oxygen (O 2) Sensor: v Heated for more accuracy, beyond exhaust temps. v HEGO 1 (pre-cat) senses rich/lean to adjust fuel mixture. v HEGO 2 (post-cat) checks catalyst for efficiency. KUBOTA ENGINE AMERICA Service Training

Pre-Cat O 2 Sensor: v v Bosch LSF 4 sensor Pre-cat used for closed loop fuel control Used as a rich-lean switch Only 1 DTC: EGO 1 Open/Lazy KUBOTA ENGINE AMERICA Service Training

Post-Cat O 2 Sensor: v v Bosch LSF 4 sensor Post-cat used mainly for catalyst efficiency checking Post cat O 2 failure should not cause an engine running problem Only 1 DTC: EGO 2 Open/Lazy KUBOTA ENGINE AMERICA Service Training

Temperature and Manifold Absolute Pressure Sensor: TMAP. Mounted in the intake manifold and provides ECU data to calculate air flow pressure and density. KUBOTA ENGINE AMERICA Service Training

Temperature and Manifold Absolute Pressure Sensor: v Combines both intake air temperature and intake manifold pressure v Will compensate for intake temperature, altitude, and air cleaner restriction KUBOTA ENGINE AMERICA Service Training

Crankshaft Position Sensor: Provides engine RPM information to the ECU. KUBOTA ENGINE AMERICA Service Training

Crankshaft Position Sensor: KUBOTA ENGINE AMERICA Service Training

Camshaft Position Sensor: Identifies which cylinders are in compression to begin spark timing. KUBOTA ENGINE AMERICA Service Training

Camshaft Position Sensor: KUBOTA ENGINE AMERICA Service Training

Knock Sensor: Early detonation detection via mechanical vibration at the cylinder head/block deck level. KUBOTA ENGINE AMERICA Service Training

Knock Sensor: v Reacts with a specific frequency from detonation. v When knock is detected, voltage output is increased. v ECU retards ignition timing. v Installed sensor at 35 – 50 degrees from vertical. KUBOTA ENGINE AMERICA Service Training

Service Manuals Workshop & Diagnosis Manuals KUBOTA ENGINE AMERICA Service Training

Service Tool E-Com Interface Device v Connects between USB port and connection on engine v Can be connected any time, engine running or not KUBOTA ENGINE AMERICA Service Training

Service Tool Interface Connector KUBOTA ENGINE AMERICA Service Training

Service Tool Software v. Interface available through KEA’s Parts Department. v. Software is Free, and available for download through K-ISS. KUBOTA ENGINE AMERICA Service Training