Barrel and plunger assembly for Cummins NT855, K19, M11 diesel engines, aftermarket replacement fuel injector parts. All part numbers are cross-referenced against OEM specs for direct matching.

Part numbers: 3627868, 3079945, 3054533, 3076738, 3049996, 3084892, 3045422, 3045428, 3065348
Fits: Cummins NT855, K19, M11 diesel engine
Position: PT fuel injector core assembly

What you are ordering
Price is per barrel & plunger set. All part numbers are separate variants, please select the correct PN from variant options. These plunger sets are not interchangeable. Different part numbers have different fuel delivery rates and pressure characteristics. Wrong selection will cause poor atomization, power loss, excessive smoke and abnormal fuel consumption.

Specifications
Material: high precision alloy steel
Structure: matched barrel and plunger pair, lapped together
Flow & pressure: calibrated to OEM standard
Finish: wear-resistant & anti-corrosion treatment, leakage and flow tested before packing
Packing: individual protective tube, marked with part number

When to replace
Barrel and plunger suffer wear from dirty fuel and long service hours. Common failure signs: hard starting, unstable idle, black smoke, low power, high fuel consumption, injector internal leakage. Replace the matched barrel plunger set together when wear is detected, and check fuel filter and fuel tank cleanliness.

Fitting notes
Strictly clean the injector before assembly. Do not mix barrel and plunger from different sets. Follow Cummins service manual for injector assembly torque and timing adjustment. If you are not sure which PN matches your engine CPL, send us engine serial number for confirmation.

Warranty and shipping
Covered by a 12-month warranty against manufacturing defects. Orders are dispatched within 3–7 business days; DHL / FedEx delivery takes 5–10 business days. Tracking number is sent as soon as the parcel leaves our warehouse.

Note: manufacturer names and part numbers are used for identification and cross-referencing only. We are an independent aftermarket supplier and are not affiliated with, or authorised by, the original manufacturer. Please verify the part number against your engine's parts catalogue before ordering — our team is happy to help if you send us your engine model or serial number.