6CT QSC8.3 Vehicle Crankshaft Engine Spare Parts 3917320 3914584 3910968 3905625 3918986 3917446 3904363 3917443

6CT QSC8.3 engine spare parts Crankshaft 3917320 3914584 3910968 3905625 3918986 3917446 3904363 3917443

▪ OE Part No.: 3918986 (Cross ref: 3917320)

▪ Compatible Engine: 6CT, 6CTA, QSC8.3

▪ Application: Heavy truck, excavator, marine engine, generator set

▪ Material: High-strength forged steel

▪ Machining: Precision journal grinding + nitriding treatment

▪ QC Standard: Dynamic balance, dimensional inspection, fillet check

Description: This heavy-duty crankshaft serves as the core rotating component for  6CT 8.3L diesel engines. Nitrided bearing journals deliver outstanding wear resistance. Reinforced fillet design effectively prevents fatigue cracking under continuous heavy load. Every unit is fully inspected before packing to guarantee smooth rotation and stable power output.

Heavy-duty forged crankshaft built for 6CT 8.3L diesel engine.

✔ Nitrided journals for extended service life

✔ Precision balanced to reduce engine vibration

✔ Fits trucks, excavators and stationary power units

✔ Aftermarket replacement for engine overhaul Cross reference: 3917320

This crankshaft with part number 3918986 is engineered for  6CT 8.3L series diesel engines, widely deployed on heavy trucks, construction excavators, marine propulsion and generator equipment. Working under sustained high torque and fluctuating load, it adopts premium forged steel as raw material. All main journals and pin journals are finely ground and nitrided to raise surface hardness and abrasion resistance. The fillet rolling process strengthens the stress transition zone to avoid unexpected fracture during long-hour operation. We carry out dynamic balance testing and full dimension verification for each crankshaft. Strict tolerance control ensures good fitment, lowers bearing wear and keeps reliable engine performance for repair shops and fleet maintenance projects.