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约翰迪尔强鹿六缸柴油机低压燃油系统流程操作图迪尔904 1054 1204拖拉机操作手册

发布日期:2022/5/26 13:36:57

约翰迪尔强鹿六缸柴油机低压燃油系统流程操作图迪尔904 1054 1204拖拉机操作手册

Low Pressure Dual Rail Fuel Supply System Operation
A—Fuel Transfer Pump E—Hand Primer Pump I—Fuel Manifold M—Primary-Filtered Fuel
B—In-line Check Valves F—Primary Filter Base Outlets J—Fuel Supply Rail N—Final-Filtered Fuel
C—Primary Filter G—Water Separator Bowl K—Fuel Return Rail O—Recirculated Fuel
D—Primary Filter Base H—Final Filter L—Suction Fuel from Tank P—Return-to-Tank Fuel

The fuel transfer pump (A) draws fuel from  the fuel passages to route fuel into and out of  the cylinder tank through an in-line check valve (B) into  the primary head. On some applications, the fuel manifold also filter base (D) contains a hand-primer pump (E) and contains a fuel pressure sensing switch. The fuel three outlet passages (F). The water separator bowl pressure regulator will maintain fuel pressure at 410– (G), which screws to the bottom of the fuel  filter base. 480 kPa (4.1–4.8 Bar) (60–70 psi).
A self venting drain valve is mounted on the bottom  of
the clear bowl. Fuel flows from the fuel manifold into the  fuel supply rail in the cylinder head. Fuel rails are drilled  passages
Fuel flows from one of the primary filter base  outlets to in the cylinder head that route fuel to each  unit
the inlet of the fuel transfer pump mounted on  the rear injector. The fuel supply rail (J) is the bottom  drilled
of the head. The fuel transfer pump is a  gear type passage; the return fuel rail (K) is the top  drilled
pump. The pump shaft is coupled to the end  of the passage. The two passages are connected at the front camshaft. The fuel transfer pump contains a pressure of the head.
regulating valve for system over-pressure protection. A
bypass valve in the pump base allows fuel  to bypass Excess fuel not needed by the electronic unit injectors the gears during hand priming. flows from the cylinder head into the fuel manifold.  The
fuel flows past the fuel temperature sensor. At this  Fuel flows from the outlet of the fuel transfer  pump to point the fuel is routed in one of two  directions. The the inlet of the final fuel filter (H). The  spin-on final return to tank orifice will cause approximately 10% of filter is the last clean-up of the fuel before  entering the the fuel to flow back to the fuel tank.  The return-to-tank engine. fuel enters the tank at the bottom to prevent  fuel
drain-back. The remaining 90% of the fuel will flow Fuel flows from the outlet of the final filter to  the fuel past the pressure regulating valve and return to the manifold (I) mounted on the rear of the  cylinder head. inlet of the fuel transfer pump to be recirculated The fuel manifold contains a fuel temperature sensor, through the cylinder head.
pressure regulating valve, return to tank orifice, and
RG,RG34710,1525   –19–30SEP97–2/2

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