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Jining Tongderui Construction Machinery Co., Ltd.


Home > Products > Engine Parts > PC300-7 Fuel Injection Pump 6743-71-1131 Excavator Parts

PC300-7 Fuel Injection Pump 6743-71-1131 Excavator Parts
PC300-7 Fuel Injection Pump 6743-71-1131 Excavator Parts

PC300-7 Fuel Injection Pump 6743-71-1131 Excavator Parts

Min. Order: 1 Piece/Pieces

Basic Info

    Model No.: PC300-7 PC350-7

Additional Info

    Packaging: Carton

    Transportation: Air,DHL FEDEX TNT UPS

    Port: Jining,Qingdao,Shenzhen

Product Description

fuel injection pump is part of fuel pump and essential to Pump Assembly. Excavator Engine Parts for Komatsu Hitachi Kobelco Hyundai Doosan Daewoo Volvo and so on.

Working principle of fuel injection pump

Its basic working principle is that there are two sets of opposed plungers installed on the impeller in the pump, when the impeller is driven by the engine to rotate, the plunger also rotates, because the cam ring convex part of the pressure plunger, so that the plunger plays the role of the pump to the impeller center of the oil hole pressure to send diesel oil, when the diesel oil sent out is full of The distributor inlet is arranged, and the injection is arranged sequentially according to each cylinder.

1. Oil absorption and oil pressure process

The oil and oil pressure of the fuel injection pump is accomplished by reciprocating motion of plunger in plunger bushing. When the plunger is located in the lower position, the two oil holes on the plunger sleeve are opened, the inner cavity of the plunger sleeve is connected with the oil channel in the pump body, and the fuel fills the oil chamber rapidly.

When the cam is pushed to the roller of the roller body, the plunger will rise. Move upward from the plunger to the oil hole and be blocked by the upper end of the plunger. During this period, the fuel is extruded from the oil chamber and flows to the oil channel due to the movement of the plunger. So this lift is called pre stroke. When the plunger obstructed the oil hole, the oil pressure process began. The plunger goes up and the oil pressure rises sharply inside the oil chamber. When the pressure exceeds the spring elastic force of the oil outlet valve and the upper oil pressure, the oil valve is jacked out and the fuel is pressed into the oil pipe and sent to the injector.

Pc300 7 Fuel Pump

Our Services

1 Hydraulic parts: Hydraulic Pump, Main Valve , Hydraulic Cylinder, Final Drive , Travel Motor, swing machinery, Swing Motor etc.

2 Engine parts: engine ass`y, piston, piston ring, cylinder block, cylinder head, crankshaft, turbocharger, fuel injection pump, starting motor and alternator etc.

3 Undercarriage part: Track roller, Carrier roller, Track Link, Track shoe, Sprocket, Idler and Idler cushion etc.

4 Cab parts: operator`s cab, Wiring Harness, monitor, controller, seat, door etc.

5 Cooling parts: Radiator, Air Conditioner, compressor, After Cooler etc.

6 Other parts: Service kit, swing circle, engine hood, swivel joint, Fuel Tank , filter, boom, arm, bucket etc.

Komatsu Fuel Pump Contact

Looking for ideal PC300-7 Fuel Injection Pump Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Komatsu Injection Pump are quality guaranteed. We are China Origin Factory of Komatsu Fuel Pump. If you have any question, please feel free to contact us.

Product Categories : Engine Parts

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