149-9851 CAT 3304 Fuel Injection Pump , Engine Fuel Pump 2nd Hand For Excavator E330B
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149-9851 CAT 3304 Fuel Injection Pump , Engine Fuel Pump 2nd Hand For Excavator E330B
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Basic Infomation
Place of Origin: USA
Brand Name: Caterpillar
Model Number: 3306
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149-9851 2nd Hand Fuel Injection Pump

,

3304 2nd Hand Fuel Injection Pump

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E330B Engine Fuel Pump 2nd Hand

Payment & Shipping Terms
Packaging Details: Neutral Package or Fumigation Free
Delivery Time: 5 - 8 work days
Payment Terms: D/P, T/T
Supply Ability: 5 pieces
Specifications
Product Name: Used Fuel Injection Pump
Excavator Model: E330B
Engine Model: 3306
Condition: Used
Type: Diesel Engine
Part Number: 149 - 9851
Color: Same As Pictures
Material: Steel
Product Description

 

 

3306 Used Fuel Injection Pump For Excavator E330B 149 - 9851

 

 

Specification

 

 

Part name Engine fuel pump
Pump code 149 - 9851
Pump number 153 - 5739
Condition Original Used
Test staus Normal
Engine Type Diesel
Injection Direct injection
Quality High quality

 

 

Description

 

Definition of Inline Injection Pump

 

Fuel feeds are fuel enter-exit door, there are three fuel feeds
inlet feed, used as fuel entrance from the tank to the pump
output feed, used as the fuel exit to the injector in high pressure conditions
return feed, used to drain the remaining fuel that is not pressed into the injector

 

And how does it work?

 

1. The outside mechanism of injection pump

Generally, there is a mini pump that is used to transfer fuel from the tank into the injection pump. This pump works mechanically, meaning it is driven by the crankshaft engine.

So, to run the fuel flow we need to crank the engine.


When the crankshaft rotates, the mini pump will send diesel fuel from the tank into the injection pump through the inlet feed. From the inlet feed, the fuel directly fill the fuel barrel and it is ready to be pressed.

 

2. The injection pump mechanism

The pump camshaft is connected to the engine crankshaft, so that when the engine cranks automatically the pump camshaft rotates.

This rotation will move the plunger, so that the plunger is pressed upwards and as a result the fuel that is already in the fuel barrel is pressed with high pressure and enters the injector.

When the cam has finished pressing the plunger, the plunger returns to the bottom position. This will reopen the fuel barrel chamber, so that the fuel from the inlet feed filling the fuel barrel directly.

 

3. Engine RPM setting mechanism


To adjust engine RPM on conventional diesel, it is done by adjusting the amount of fuel injected by the injector.

In this case, the control is located in the fuel barrel. How much the amount of fuel in the fuel barrel when it is pressed will affect the engine RPM.

it is the task of rack and pinion. These two components will regulate the amount of fuel in the fuel barrel by regulating fuel disposal through the return feed.


The amount of fule is less (Low RPM)


The amount of fuel is more (high RPM)

So, there is a fuel path inte plunger from the fuel barrel leading to the return feed.

This path is made with a certain slope, so that when the angle of the plunger is rotated, it will affect the amount of fuel contained in the fuel barrel

To be clearer you can see the picture (viewed from side)

a. when low RPM

The amount of pressed fuel is lower, so the angle of plunger can be seen from the picture.

2. when high RPM

The amount of pressed fuel is more, so the angle of plunger can be seen from the picture.

 

149-9851 CAT 3304 Fuel Injection Pump , Engine Fuel Pump 2nd Hand For Excavator E330B 0149-9851 CAT 3304 Fuel Injection Pump , Engine Fuel Pump 2nd Hand For Excavator E330B 1

 

 

 

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