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ROD A 0876625 - Caterpillar

0876625 ROD A Caterpillar parts ROD
Alternative (cross code) number:
Caterpillar 0876625 ROD A

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Primary Filter/Water Separator
Illustration 3 g02848802
Typical example
The primary filter/water separator (1) is located between the fuel tank and the fuel transfer pump. The primary filter/water separator (1) provides a 10 micron filtration level.The primary filter/water separator can either be engine mounted or supplied loose. The primary filter/water separator is supplied with water in fuel sensor. The water in fuel sensor has to be connected.Secondary Fuel Filter
Illustration 4 g02848803
Typical example
The secondary fuel filter (1) is located after the fuel transfer pump. The secondary fuel filter (1) provides a 4 micron filtration level.The fuel temperature sensor measures the temperature of the fuel. The ECM receives the signal from the fuel temperature sensor. The ECM calculates the volume of fuel.Fuel Pump Assembly
Illustration 5 g02493877
Typical example
The fuel pump assembly consists of a low-pressure transfer pump and a high-pressure fuel injection pump. The pump assembly is driven from a gear in the front timing case at one a half times the engine speed. The fuel injection pump (1) has one plunger that are driven by a camshaft. The stroke of the plunger is fixed but the volume of fuel that is provided by the fuel injection pump is controlled by the suction control valve.The injector will use only part of the fuel that is delivered by each stroke of the pistons in the pump. The suction control valve (2) for the fuel injection pump is controlled by the ECM. This maintains the fuel pressure in the fuel manifold (rail) at the correct level. A feature of the fuel injection pump allows fuel to return to the tank continuously.The fuel injection pump has the following operation:
Generation of high-pressure fuelThe fuel output of the fuel injection pump is controlled by the ECM in response to changes in the demand of fuel pressure.Shutoff
The engine shuts off by preventing the electronic unit injectors from injecting. The ECM then closes the suction control valve to prevent the pressure in the fuel manifold (rail) from increasing.Control
Illustration 6 g02511078
Typical example of the electrical control system for the fuel system
(1) Electronic Control Module (ECM)
(2) Electronic unit injectors
(3) Suction control valve
(4) Fuel injection pump
(5) Crankshaft position sensor
(6) Camshaft position sensor
(7) Coolant temperature sensor
(8) Fuel temperature sensor
(9) Inlet manifold air temperature and pressure sensor
(10) Oil pressure switch
(11) Fuel pressure sensor
(12) Pressure sensor for the NOx Reduction System (NRS)
(13) Wastegate regulator
(14) Water in fuel sensor
(15) Throttle position sensor The ECM determines the quantity, timing, and pressure of the fuel in order to be injected into the fuel injector.The ECM uses input from the sensors on the engine. These sensors include the speed/timing sensors and the pressure sensors.The ECM controls the timing and the flow of fuel by actuating the injector solenoid.The amount of fuel is injected is a function of fuel pressure in the fuel manifold and the duration of the signal to the injector solenoid.The ECM controls the fuel pressure by increasing or decreasing the flow of fuel from the fuel injection pump.Fuel Injectors
Illustration 7 g02493878
Typical example
(1) Electrical connections
(2) Bolt
(3) Clamp
(4) Combustion washer
(5) O-ring
(6) Fuel inlet The fuel injectors

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