14781-ZE1-000 Honda ROTATOR, VALVE (Honda Code 1427004).

Illustration 1 g01378375
Schematic of the ARD purge air pump and the fuel system
(1) Fuel filter base
(2) Manifold for the fuel pressure sensor on C15 engines
(3A) Fuel pressure sensor on C15 engines (If equipped)
(3B) Fuel pressure sensor on C13 engines (If equipped)
(4) Cylinder head
(5) 1034 kPa (150 psi) regulator
(6) Fuel temperature sensor
(7) Fluid sampling valve
(8) Bypass for hand priming pump
(9) Optional hand priming pump
(10) Secondary fuel filter
(11) Air purge screw
(12) 517 kPa (75 psi) regulator
(13) Fuel enable valve of the Aftertreatment Regeneration Device (ARD)
(14) 689 kPa (100 psi) regulator
(15) Return check valve
(16) Fuel transfer pump
(17) 2068 kPa (300 psi) regulator
(18) ARD fuel manifold
(19) Pilot fuel control solenoid
(20) Pilot fuel pressure sensor
(21) Manifold for the lines to the ARD
(22) Wire mesh filter
(23) ARD head
(24) Main fuel control solenoid
(25) Main fuel pressure sensor
(26) Wire mesh filter
(27) ARD purge air pump
(28) 40 micron filter
(29) Check valve
(30) Cleaning port
(31) Line for the purge air to the ARD head
(32) Wire mesh filter
(33) Primary fuel filter
(34) Fuel tank
Illustration 2 g01521720
Schematic diagram of the heated nozzle and the fuel system
(1) Fuel filter base
(2) Manifold for the fuel pressure sensor on C15 engines
(3A) Fuel pressure sensor on C15 engines
(3B) Fuel pressure sensor on C13 engines
(4) Cylinder head
(5) 1034 kPa (150 psi) regulator
(6) Fuel temperature sensor
(7) Fluid sampling valve
(8) Bypass for hand priming pump (9)
( 9) Optional hand priming pump
(10) Secondary fuel filter
(11) Air purge screw
(12) 517 kPa (75 psi) regulator
(13) ARD fuel enable valve
(14) 689 kPa (100 psi) regulator
(15) Return check valve
(16) Fuel transfer pump
(17) 2068 kPa (300 psi) regulator
(18) ARD fuel manifold
(19) Pilot fuel control solenoid
(20) Pilot fuel pressure sensor
(21) Manifold for the lines to the ARD
(22) Wire mesh filter
(23) ARD head
(24) Main fuel control solenoid
(25) Main fuel pressure sensor
(26) Wire mesh filter
(33) Primary fuel filter
(34) Fuel tank
(37) Nozzle orifice
Illustration 3 g01377881
Typical example
(1) Fuel filter base
(10) Secondary fuel filter
(16) Fuel transfer pump
(35) Electronic unit injector
Illustration 4 g01377896
Fuel filter base on C13 engines
(3B) Fuel pressure sensor
(5) 1034 kPa (150 psi) regulator
(6) Fuel temperature sensor
(7) Fluid sampling valve
(8) Bypass for hand priming pump
(9) Optional hand priming pump
(10) Secondary fuel filter
(11) Air purge screw
(12) 517 kPa (75 psi) regulator
(13) ARD fuel enable valve
(14) 689 kPa (100 psi) regulator
(36) Fuel outlet line to the cylinder head
(37) Fuel outlet line to the ARD
(38) Fuel supply line from the fuel transfer pump
(39) Fuel return line from the cylinder head
(40) Fuel outlet port to the fuel tankNote: These engines are required to use Ultra Low Sulfur Diesel (ULSD) diesel fuel. ULSD fuel contains less than 15 ppm sulfur using ASTM D 2622 or DIN 51400. The use of higher sulfur diesel fuel in an engine with a DPF will cause the engine to produce emissions that are not in compliance with emissions standards and deactivation of the catalyst within the DPF. The use of a blend of No.1 and No.2 fuel is allowed in an engine that is equipped with a DPF, if both of the base fuels meet the ULSD standard.The fuel supply circuit is a conventional design for electronic unit injector diesel engines. Fuel transfer pump (16) of the circuit is a gear-type pump with positive displacement. The fuel transfer pump is located in the front of the engine at the lower left corner. The fuel transfer pump is mounted to the front timing gear cover. The fuel transfer pump is driven by the front gear train.The fuel transfer pump draws fuel from fuel tank (34). The fuel passes through primary filter/water separator (33). The fuel passes into the fuel transfer pump and the fuel is then pressurized. The fuel transfer pump incorporates a check valve in order to permit a fuel flow around the gears for hand priming. The fuel transfer pump also incorporates a relief valve in order to protect the system from extreme pressure. The excess fuel flow that is provided by the fuel transfer pump is used in order to cool the electronic unit injectors. The excess fuel flow also purges the air from the fuel system.The fuel from the fuel transfer pump flows through the fuel filter at fuel filter base (1). Fuel temperature sensor (6) is mounted in the fuel filter base. The Engine Control Module (ECM) uses the sensor to monitor the temperature of the fuel that is entering the engine. The information is used by the ECM to calculate a fuel correction factor during engine operation. Fuel priming pump (9) is positioned on the fuel filter base in order to prime the system when air has been introduced into the fuel system. For more information on priming the fuel system, refer to Testing and Adjusting, "Fuel System - Prime".The fuel leaves the fuel filter base and flows through the fuel supply line to the cylinder head. The fuel enters the cylinder head at the front of the engine. Fuel is delivered to the electronic unit injectors through fuel manifold (2) that is drilled into the cylinder head during the manufacturing process.Excess fuel exits the cylinder head at the rear. The fuel returns to the fuel filter base through the fuel return line to the pressure regulating valve that is incorporated into the fuel filter base. The pressure regulating valve maintains a sufficient amount of back pressure in the system in order to fill the electronic unit injectors. After the fuel passes through the pressure regulating valve, the fuel returns to the fuel tank. The fuel flows continuously from the fuel supply through the electronic unit injectors in the head and back to the tank.Note: The primary fuel filter is the only filter for the ARD fuel.Fuel Recirculation (If Equipped)
A system for fuel recirculation may be installed on this engine in order to supply warm fuel to the unit injectors during cold engine operation. A thermostatic valve is in the open position when the fuel is cold. This allows the warm fuel to re-enter the fuel transfer pump instead of going back to the fuel tank. When the fuel reaches 80 °C (176 °F) the thermostatic valve will close directing the warm fuel to the fuel tank.Fuel Heaters
Fuel