Engine drive belts for Cummins 4BT, 6BT, 6CT, 6LT series diesel engines, aftermarket V-ribbed belts used to transmit power to the fan, alternator, water pump and air conditioning compressor. All part numbers are cross-referenced against OEM specs for direct matching.

Part numbers: 3288790, 3288812, 3288779, 3288497, 3288475, 3288717, 3288757, 3288856, 5412994, 3979344, 3289001, 3289135, 3911587, 5690184, 3289426, 3289558
Fits: Cummins 4BT, 6BT, 6CT, 6LT diesel engine
Position: Engine accessory drive system, fan / alternator / water pump belt

What you are ordering
Price is per belt. All part numbers are separate variants, please select the correct PN from variant options. These belts are not interchangeable. Different part numbers have different rib quantity, length, section profile and load rating. Wrong selection will lead to belt slipping, abnormal noise, pulley wear and premature breakage.

Specifications
Material: high strength rubber composite with tension cord
Structure: multi-ribbed / V-ribbed drive belt
Dimension & load rating: matched to OEM specification
Finish: heat resistant, oil resistant, anti-abrasion, low stretch, static conductive
Packing: individual protective bag, marked with part number

When to replace
Replace the belt when cracked, chipped, glazed, frayed, stretched or with exposed cords. Common failure signs: squealing noise on start-up, belt walking off the pulley, slipping under load, power loss of fan and charging system. Replace the belt together with the tensioner pulley during routine maintenance, and re-check tension after the first 100 hours.

Fitting notes
Strictly confirm engine serial number and belt code before ordering. Do not install belts of different specifications interchangeably. Follow Cummins service manual for belt routing and tension adjustment; check pulley alignment after installation. If you are not sure which PN matches your engine, send us your engine serial number or the old belt code 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.