SEAL AS 1390566 - Caterpillar

Introduction
Illustration 1 g01363263
Block diagram (1) Air cleaner (2) Air inlet temperature sensor (3) Control group for the Clean Gas Induction (CGI) system (4) Differential pressure sensor for the CGI system (5) Absolute pressure sensor for the CGI system (6) Temperature sensor for the CGI system (7) Cooler for the CGI system (8) Turbocharger outlet temperature sensor (1) (9) Combustion detection temperature sensor (2) (10) Combustion boundary temperature sensor (3) (11) Ignition coil (12) Spark plug (13) ARD head (14) ARD body (15) DPF (16) Inlet temperature sensor for the particulate trap (17) Differential pressure sensor for the particulate trap (18) Outlet temperature sensor for the particulate trap (19) Variable nozzle turbocharger (20) Turbocharger speed sensor (21) Air pressure control valve (22) Differential pressure sensor for the combustion air supply (23) Pilot fuel pressure sensor (24) Main fuel pressure sensor (25) Pilot fuel control solenoid (26) Main fuel control solenoid (27) Fuel enable actuator (28) Secondary fuel filter (29) Fuel transfer pump (30) Fuel tank (31) Air-to-air aftercooler (32) Coolant temperature sensor (33) Secondary speed-timing sensor (34) Primary speed-timing sensor (35) Fuel injectors (36) Intake manifold pressure sensor (37) Intake manifold air temperature sensor (38) High pressure fuel pump (39) Fuel rail pressure sensor (40) Oil pressure sensor (41) Engine Control Module (ECM) (42) Purge valve (43) EngineThe operation of this fuel system is completely different from any other type of fuel system that is actuated mechanically. The fuel system is completely free of adjustment. Adjustments to the components that are mechanical can not be made. Changes in performance are made by installing different software on the ECM (41) .This fuel system consists of five major components:
High pressure fuel pump (38)
Engine Control Module (ECM) (41)
Fuel Injectors (35)
Fuel rail
Fuel transfer pump (29) Note: The components of the fuel system are not serviceable. These fuel system components must not be disassembled. Disassembly will damage the components. If the components have been disassembled, Caterpillar may not allow a warranty claim or Caterpillar may reduce the warranty claim.Fuel System Operation
Fuel is pulled from the fuel tank (30) and through the primary fuel filter by the use of the transfer pump (29) . The transfer pump (29) sends the fuel through the secondary fuel filter (28) and up to the fuel pump (38) . The fuel pump (38) pressurizes the fuel that is sent to the fuel rail. The fuel rail distributes the fuel to the fuel injectors (35) by the use of quill tubes. The fuel rail uses a fuel pressure sensor (39) that tells the ECM (41) the pressure of the fuel rail. The ECM also receives engine speed from the speed/timing sensor (34) . The ECM controls the solenoids for the fuel pump (38) in order to obtain the correct amount of pressure. If pressure at the fuel rail is too high, the pressure relief valve will drain proper amounts of fuel back to the fuel tank. Once the fuel reaches the fuel injectors, the fuel injectors open a control valve that