Caterpillar original 0R-3421 Fuel Injector 4W-7017 for Cat 3306 3406 3406B 3406C 3412 3408 Excavator Construction Machinery, Replacement for OEM 104-3377, Cross Reference 0R-1744 original new injector

Name: Caterpillar original 0R-3421 Fuel Injector 4W-7017 for Cat 3306 3406 3406B 3406C 3412 3408 Excavator Construction Machinery, Replacement for OEM 104-3377, Cross Reference 0R-1744 original new injector
Brand: Pan Asia Diesel System Parts Co., Ltd.
SKU: 0R-3421
Price: 34.00 USD
Availability: InStock

Place of Origin:USA

Brand Name:CATERPILLA

Certification:Contact: 86+ 19959162250

Model Number:0R-3421

Minimum Order Quantity:1

Price:$22-$47

Payment Terms:T/T, Western Union

Supply Ability:1000pcs/months

Product Details

Highlight:

Caterpillar 0R-3421 fuel injector

Cat 3306 3406 diesel injector

OEM 104-3377 replacement injector

Product Name: CATerpillar Injector

OE NO: 0R-3421

OE no1: 104-3377

OE no2: 0R-1744

Warranty: 12 Months

Contact: 86+ 19959162250

Quality: Brand New Genuine

Car Model: CATERPILLA ENGINE

ApplicATio: Fuel Injection System

Material: High Speed Steel

Type: Diesel

SIZE: Origional Standard

Product Description

Caterpillar original 0R-3421 Fuel Injector 4W-7017 for Cat 3306 3406 3406B 3406C 3412 3408 Excavator Construction Machinery, Replacement for OEM 104-3377, Cross Reference 0R-1744 original new injector

Fuel Type	Diesel
Condition	Remanufactured (Cat Reman)
Applicable Engine	CAT 3406B, 3406C, 3408, 3408B and 3408C; industrial, marine and generator engine series
Injector Type	Fuel Injector Nozzle Assembly
Quality Standard	OEM-grade
Packaging	Not specified
Fuel System	Diesel Fuel Injection System
OE Number	0R-3421 (0R3421)
Brand	Caterpillar / CAT
Cross Number / Universal Number	M-0R3421; replaces 4W-7017 (4W7017)
Vehicle / Equipment Application	Excavators, wheel loaders, motor graders, quarry trucks, generator sets and marine applications
Application Type	Construction, mining, marine, industrial, oil & gas, agricultural and power generation sectors

Built for demanding Caterpillar diesel platforms, the 0R-3421 Fuel Injector Nozzle Assembly is a Cat Reman component for high-pressure fuel injection systems. It replaces original fuel valve nozzle 4W-7017 and is also referenced as 0R3421 and Interstate McBee M-0R3421. Applications cover CAT 3406B, 3406C, 3408, 3408B and 3408C engines across industrial, marine and generator series, supporting equipment used in construction, mining, oil and gas, agriculture and power generation.

As a precision fuel-metering device, the nozzle uses fuel pressure to lift the needle valve at its calibrated opening pressure. Diesel then passes through micro-machined nozzle holes and enters the combustion chamber as an atomized spray. Nozzle geometry influences spray penetration, atomization quality, combustion temperature, fuel economy and emissions. Its engineering focus is precise atomization and efficient combustion, helping reduce fuel consumption, soot formation, exhaust emissions and engine deposits while supporting engine responsiveness, cold-start performance, injector service life and reliable severe-duty operation.

For service operations, correct identification and clean installation are essential. Technicians should clean the injector seat, verify the part number, replace sealing components, apply the OEM torque specification, bleed the fuel system and check spray and engine performance. Using ISO-compliant diesel fuel, preventing contamination, replacing filters on schedule and monitoring injector balance rates support consistent operation.

Contact Detail:

ADD:Huangpu Machinery City, No.585-A, No.138, Southeast Road, Huangpu District, Guangzhou City,

Guangdong Province Tel:+86 020 88557755

Cellphone:+86 19959162250 WhatsApp:+86 19959162250

Email:2209396088@qq.com

Product Summary

Caterpillar original 0R-3421 Fuel Injector 4W-7017 for Cat 3306 3406 3406B 3406C 3412 3408 Excavator Construction Machinery, Replacement for OEM 104-3377, Cross Reference 0R-1744 original new injectorFuel TypeDieselConditionRemanufactured (Cat Reman)Applicable EngineCAT 3406B, 3406C, 3408, 3408B and ...

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