Core Parameters & Matching Info
Main Part Number: 3279720
Product Type: Injector Nozzle Cup / PT Injector Repair Component
Applicable Engine: Cummins K19, KTA19, K38, KTA38, K50, QSK19, QSK38 Series Diesel Engine
Applicable Equipment: Heavy‑duty truck, mining machinery, construction equipment, generator set, marine diesel engine
Material: High‑hardness heat‑treated alloy steel
Process: Heat treatment, precision grinding, dimensional sorting, appearance inspection
Condition: 100% Brand New Aftermarket OEM Quality
Warranty: 12 Months
MOQ: 1 Piece (Support Sample & Bulk Wholesale)
Packing: Neutral Independent Packaging, Custom Private Label Supported
Key Features
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High‑Hardness Heat‑Treated Alloy Steel: Excellent high‑temperature resistance, anti‑deformation performance, adapts to severe working environment of PT fuel system.
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Micron‑Level Precision Machining: Strict tolerance control, perfect assembly matching, reliable sealing effect, effectively prevent fuel leakage.
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Stable Protection for Injector Inner Parts: Effectively protect internal nozzle assembly, reduce carbon deposit erosion, extend whole injector service life.
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1:1 OEM Interchangeability: Consistent with original installation dimension, direct replacement for old or damaged cups without modification.
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Economical Overhaul Solution: Replace only the nozzle cup instead of complete injector, greatly lower heavy‑duty engine maintenance expenses.
Solvable Common Faults
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Injector internal leakage caused by deformed or cracked nozzle cup
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Poor fuel atomization and incomplete combustion
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Engine black smoke emission under load condition
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Insufficient engine power and weak equipment output performance
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High fuel consumption resulted from sealing failure
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Injector failure caused by aging, scratch and carbon accumulation of nozzle cup
Why Choose Us
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✅ Professional supplier for Cummins K‑series PT injector repair spare parts
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✅ Every 3279720 injector cup undergoes strict dimension & appearance inspection before shipment
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✅ OEM‑equivalent size and performance, reliable sealing for injector overhaul
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✅ Flexible order support: sample test, small batch retail and large‑volume wholesale
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✅ Adequate spot inventory, fast global delivery and stable supply capacity
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✅ Neutral packaging, private label service and professional diesel repair technical support
FAQ
Q1: What engine does 3279720 injector cup fit?
A1: It is designed for Cummins K19, KTA19, K38, KTA38, K50, QSK19, QSK38 heavy‑duty diesel engines, widely used for mining machinery, generators and marine engines.
Q2: What symptoms mean I need to replace this injector cup?
A2: Replace when you meet injector inner leakage, bad atomization, black smoke, power loss and high fuel consumption caused by cup deformation, crack or carbon deposit.
Q3: Installation requirement?
A3: It belongs to precision repair part. Professional disassembly, cleaning and injector bench test are required after installation by experienced technicians.
Q4: About quality and delivery?
A4: All products are strictly inspected before shipment, covered with 12‑month warranty. Support sample and bulk order with fast worldwide shipment.
