15150-ZW1-000 ORIFICE ASSY., OIL PASSAGE (Honda Code 4897609). Honda
BF75A1 LHTA, BF75A1 LRTA, BF75A1 XRTA, BF75A2 LHTA, BF75A2 LRTA, BF75A2 XRTA, BF75A3 LHTA, BF75A3 LRTA, BF75A3 XRTA, BF75A4 LHTA, BF75A4 LRTA, BF75A4 XRTA, BF75A5 LHTA, BF75A5 LRTA, BF75A5 XRTA, BF75A6 LHTA, BF75A6 LRTA, BF75A6 XRTA, BF75AT LHTA, BF7
ORIFICE
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Compatible models:
BF75A1 LHTA
BF75A1 LRTA
BF75A1 XRTA
BF75A2 LHTA
BF75A2 LRTA
BF75A2 XRTA
BF75A3 LHTA
BF75A3 LRTA
BF75A3 XRTA
BF75A4 LHTA
BF75A4 LRTA
BF75A4 XRTA
BF75A5 LHTA
BF75A5 LRTA
BF75A5 XRTA
BF75A6 LHTA
BF75A6 LRTA
BF75A6 XRTA
BF75AT LHTA
BF75AT LRTA
BF75AT XRTA
BF75AW LHTA
BF75AW LRTA
BF75AW XRTA
BF75AX LHTA
BF75AX LRTA
BF75AX XRTA
BF75AY LHTA
BF75AY LRTA
BF75AY XRTA
BF90A1 JHTA
BF90A1 JRTA
BF90A1 LHTA
BF90A1 LRTA
BF90A1 XRTA
BF90A2 JHTA
BF90A2 JRTA
BF90A2 LHTA
BF90A2 LRTA
BF90A2 XRTA
BF90A3 JHTA
BF90A3 JRTA
BF90A3 LHTA
BF90A3 LRTA
BF90A3 XRTA
BF90A4 JHTA
BF90A4 JRTA
BF90A4 LHTA
BF90A4 LRTA
BF90A4 XRTA
BF90A5 JHTA
BF90A5 JRTA
BF90A5 LHTA
BF90A5 LRTA
BF90A5 XRTA
BF90A6 JHTA
BF90A6 JRTA
BF90A6 LHTA
BF90A6 LRTA
BF90A6 XRTA
BF90AT LHTA
BF90AT LRTA
BF90AT XRTA
BF90AW JHTA
BF90AW JRTA
BF90AW LHTA
BF90AW LRTA
BF90AW XRTA
BF90AX JHTA
BF90AX JRTA
BF90AX LHTA
BF90AX LRTA
BF90AX XRTA
BF90AY JHTA
BF90AY JRTA
BF90AY LHTA
BF90AY LRTA
BF90AY XRTA
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Information:
Electronic Controls
Electronic Control Module
The ECM consists of two main components, the control computer (hardware) and the flash file. The control computer consists of a microprocessor and of electronic circuitry. The flash file contains the engines operational characteristics. The operating maps influence the engines performance.Engine Governor
The engine ECM governs engine speed. The engine ECM and the flash file work together by controlling the amount of fuel that is delivered by the injectors. Desired engine rpm is determined by the throttle position sensor signal and by certain sensor readings. Diagnostic codes may derate the engine. Actual engine rpm is measured by the engine speed/timing sensor.Fuel Injection
The engine ECM controls the timing, the duration, and the pressure of the fuel that is injected. The engine ECM varies the signals to the fuel injectors. Fuel is injected only while an injector solenoid is energized by a 105 V signal from the engine ECM. The timing of the injection signal determines the engine timing. The length of the injection signal determines engine speed. By controlling the timing and duration of the 105 V signal, the ECM controls the engine speed.Cold Mode Operation
The engine ECM uses cold mode operation in order to reduce white smoke during engine warm-up. The engine ECM cuts out the injectors one at a time in order to determine if the cylinder is firing. If the cylinder is firing correctly, the engine ECM leaves the injector on. If the cylinder is not firing, the engine ECM will leave the injector turned off. This action will increase startability and this action will reduce warm-up time.Cold mode is activated whenever the engine coolant temperature falls below a predetermined value. Cold mode remains active until the engine has warmed or a time limit is exceeded.Rated Fuel Position
The rated fuel position is a limit that is based on the power rating of the engine. The rated fuel position is similar to the rack stops and the torque spring on a mechanically governed engine. The rated fuel position determines maximum power and torque values for a specific engine family and for a specific rating. The rated fuel position is programmed into the flash file.Block Diagram of Electronic Governor
Illustration 1 g00928043
Typical exampleEngine Wiring Diagram
Illustration 2 g03377038
Typical exampleLocation Of The Engine Sensors
Illustration 3 g03373584
Left side view (1) Exhaust temperature sensor (LH) (2) Engine speed/timing sensor (3) Engine ECM (4) ECM connector J2/P2 (5) ECM connector J1/P1 (6) Atmospheric pressure sensor (7) Unfiltered engine oil pressure sensor (8) Low oil level sensor (9) Filtered engine oil pressure sensor (10) Filtered fuel pressure (11) Unfiltered fuel pressure (12) Fan control solenoidLocation Of The Engine Sensors
Illustration 4 g03274496
Right side view (11) Exhaust temperature sensor (RH) (12) Intake manifold pressure sensor (13) Coolant block inlet pressure sensor (14) Electric fuel priming pump (15) Connector for the continuous oil renewal solenoid (16) Crankcase pressure sensorLocation Of The Engine Sensors
Illustration 5 g03274925
Front view (17) Connector for the engine fan speed sensor (18) Front aftercooler temperature sensor
Illustration 6 g03274924
Rear view (19) Engine speed output sensor (20) Machine interface connector (21) Rear aftercooler temperature sensor (22) Rear intake manifold temperature sensor
Electronic Control Module
The ECM consists of two main components, the control computer (hardware) and the flash file. The control computer consists of a microprocessor and of electronic circuitry. The flash file contains the engines operational characteristics. The operating maps influence the engines performance.Engine Governor
The engine ECM governs engine speed. The engine ECM and the flash file work together by controlling the amount of fuel that is delivered by the injectors. Desired engine rpm is determined by the throttle position sensor signal and by certain sensor readings. Diagnostic codes may derate the engine. Actual engine rpm is measured by the engine speed/timing sensor.Fuel Injection
The engine ECM controls the timing, the duration, and the pressure of the fuel that is injected. The engine ECM varies the signals to the fuel injectors. Fuel is injected only while an injector solenoid is energized by a 105 V signal from the engine ECM. The timing of the injection signal determines the engine timing. The length of the injection signal determines engine speed. By controlling the timing and duration of the 105 V signal, the ECM controls the engine speed.Cold Mode Operation
The engine ECM uses cold mode operation in order to reduce white smoke during engine warm-up. The engine ECM cuts out the injectors one at a time in order to determine if the cylinder is firing. If the cylinder is firing correctly, the engine ECM leaves the injector on. If the cylinder is not firing, the engine ECM will leave the injector turned off. This action will increase startability and this action will reduce warm-up time.Cold mode is activated whenever the engine coolant temperature falls below a predetermined value. Cold mode remains active until the engine has warmed or a time limit is exceeded.Rated Fuel Position
The rated fuel position is a limit that is based on the power rating of the engine. The rated fuel position is similar to the rack stops and the torque spring on a mechanically governed engine. The rated fuel position determines maximum power and torque values for a specific engine family and for a specific rating. The rated fuel position is programmed into the flash file.Block Diagram of Electronic Governor
Illustration 1 g00928043
Typical exampleEngine Wiring Diagram
Illustration 2 g03377038
Typical exampleLocation Of The Engine Sensors
Illustration 3 g03373584
Left side view (1) Exhaust temperature sensor (LH) (2) Engine speed/timing sensor (3) Engine ECM (4) ECM connector J2/P2 (5) ECM connector J1/P1 (6) Atmospheric pressure sensor (7) Unfiltered engine oil pressure sensor (8) Low oil level sensor (9) Filtered engine oil pressure sensor (10) Filtered fuel pressure (11) Unfiltered fuel pressure (12) Fan control solenoidLocation Of The Engine Sensors
Illustration 4 g03274496
Right side view (11) Exhaust temperature sensor (RH) (12) Intake manifold pressure sensor (13) Coolant block inlet pressure sensor (14) Electric fuel priming pump (15) Connector for the continuous oil renewal solenoid (16) Crankcase pressure sensorLocation Of The Engine Sensors
Illustration 5 g03274925
Front view (17) Connector for the engine fan speed sensor (18) Front aftercooler temperature sensor
Illustration 6 g03274924
Rear view (19) Engine speed output sensor (20) Machine interface connector (21) Rear aftercooler temperature sensor (22) Rear intake manifold temperature sensor