C6.4 Fuel Injector Assembly 326-4700 Engine Part for CAT 320D and 320DL Excavators
The 326-4700 fuel injector assembly is suitable for Cat
C6.4 diesel engines and is a key component of the high-pressure common rail fuel system. This injector is responsible for precisely metering and atomizing fuel into the combustion chamber, thereby improving combustion efficiency, reducing fuel consumption, and optimizing engine power output.
C6.4 Engine Fuel Injector Specifications
| Product Name |
Fuel Injector Assembly |
| Part Number |
326-4700 |
| Fuel System Type |
High-Pressure Common Rail |
| Height |
4.8in |
| Length |
8.8in |
| Operating Method |
Electronic injection |
| Minimum Order Quantity |
1 piece |
| Payment Method |
Western Union, T/T |
| Shipping Method |
UPS/DHL/EMS/TNT/FedEx |
Applicable Models
Engine: C6.4
Excavator: 320D 323D
Applications: Excavators, construction machinery, industrial power equipment
Features and Advantages
High-precision fuel injection control for more stable atomization
Improved fuel economy and reduced overall fuel consumption
Using high-temperature resistant alloy materials for extended service life
Maintaining stable performance under high pressure and continuous operating conditions

Uninstalled 320D Fuel Injector (Part No.: 326-4700)
We also offer other diesel engine injector models suitable for Kubota, Perkins, Yanmar, Isuzu, and Cat engines:
| Model |
Part Number |
| 6BG1/6BD1 |
1‑15300432‑1,1153002502 |
| 4JJ1 |
8-98011604-1 |
| C7 |
557-762,20R-9079 |
| C4.4/C7.1 |
T409980,0445120400,449-3315 |
| C7.1 |
3981507 |
| C9 |
387-9434 |
| V3300 |
093500-8181 |
| J05E |
095000-6353 |
| 6D34 |
105118-6920 |
| 6BT5.9/6D102 |
4948366 |
| D06FRC-TAA |
60214328 |
| BFM1013 |
0432191327 |
| DL06 |
0445120295 |
| 4D95/QSB3.3 |
6271-11-3100 |
| V1902 |
15271-53000 |
| V2200 |
1G911-53003 |
| QSB6.7 |
0445120383 |
| C6.6/1106D-E66TA |
2645A747R |
| 3D84 |
729506-53100 |
Guangzhou Minshun Machinery Equipment Co., Ltd.
We specialize in the sales and service of diesel engine assemblies and construction machinery parts. Our product line covers engine assemblies, filtration systems, electronic control components, hardware accessories, wiring harnesses, and electrical accessories. Our service area includes Canada, the United States, the United Kingdom, Mexico, the Netherlands, Kazakhstan, Mongolia, Russia, Australia, Malaysia, Turkey, Indonesia, Singapore, Thailand, South America, South Africa, and other countries and regions.
Our Product Range
| Engine Rebuild Kit |
Turbochargers |
Engine Diesel Pumps |
Engine Controllers (ECU) |
| Cylinder Blocks |
Cylinder Heads |
Water Pumps |
Injectors |
| Starter Motors |
Filters |
Other Engine Accessories |
Excavator Hydraulic Pumps |
| Swivel Components |
Distributor Valves |
Travel Motor Assemblies |
Chassis Components and Other Accessories |


Frequently Asked Questions
Q1: What is your main products?
A1: We are specialized in the excavator engine spare parts, for example Main cylinder block, cylinder head, crankshaft, Engine assembly, piston, cylinder liner, piston ring, camshaft, connecting rod, oil pump, water pump, valve series products, movement, etc. almost all parts of the entire engine.
Q2: Do you test all products before shipping?
A2: Yes, we conduct 100% testing before shipping.
Q3: Which engine models is this Engine Diesel Injector compatible with?
A3: This product is designed for specific diesel engine models. If you can provide the engine model or original part number, we can confirm compatibility before shipping to avoid incompatibility issues.
Q4: Can you provide cross-reference information for OEM part numbers?
A4: Yes, we support original part interchange. Please provide the original part number, and we will verify the replacement part accordingly.
Q5: What should I do if there is a problem with the product?
A5: Our products undergo professional testing and are of very stable quality. If you do find any problems, please contact us. We have a professional after-sales team to help you solve the problem.
Q6: What are the common symptoms of CAT C6.4 injector (326-4700) malfunctions?
A6: When C6.4 engine injectors experience wear or malfunction, the following typical symptoms usually appear:
Difficulty starting, especially during cold starts
Engine misfires or uneven operation, more likely to occur under high-load conditions such as with CAT 320D equipment
Black smoke from the exhaust, indicating incomplete combustion
Decreased power output, weak acceleration, or sluggish response
Abnormally increased fuel consumption
The diagnostic system may record fault codes related to fuel rail pressure or injection control.
Why Choose Us?
• Over 20 years of focus on construction machinery – offering a full range of excavator assemblies and accessories.
• Get a Quote – Our professional team will provide you with a quote immediately upon receiving your requirements.