Fuel pump AFC assembly for Cummins NT855 diesel engines, aftermarket replacement PT fuel pump air-fuel control parts. All part numbers are cross-referenced against OEM specs for direct matching.

Part numbers: 3031298, 3041494, 3059603, 3077528, 3070751, 3279798
Fits: Cummins NT855 diesel engine
Position: PT fuel pump air fuel control assembly

What you are ordering
Price is per AFC assembly. All part numbers are separate variants, please select the correct PN from variant options. These AFC assemblies are not interchangeable. Different part numbers have different air-fuel control curves, spring ratings and mounting dimensions. Wrong selection will cause improper fuel delivery under load, black smoke, power loss and poor fuel economy.

Specifications
Body material: high strength alloy steel
Structure: integrated air fuel control assembly
Control curve & spring tension: calibrated to OEM standard
Finish: precision machined, wear-resistant & anti-corrosion treatment, function tested before packing
Packing: individual protective box, marked with part number

When to replace
AFC assembly suffers spring fatigue, internal valve wear and carbon buildup after long running hours. Common failure signs: excessive black smoke under load, engine power drop, unstable air-fuel ratio, poor throttle response. Replace the matched AFC assembly together when abnormal performance appears, and inspect air intake piping and air filter condition at the same time.

Fitting notes
Strictly confirm the part number and specification before assembly. Do not install AFC assemblies of different part numbers interchangeably. Follow Cummins service manual for installation and AFC 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.