Cummins 3918986 Crankshaft For 6CT 6CTA ISC QSC Engines

Specification：

Application:
✅ Highway trucks: Intermittent heavy load & frequent start-stop

✅ Construction machinery: Continuous high torque & shock load (concrete mixers, excavators, loaders)

✅ Stationary generator sets: Long-duration steady continuous operation

✅ General marine vessels: Conventional main engine (not for heavy-duty offshore)

Why Choose US?

✔️100% genuine Cummins DCEC parts

✔️Professional technical support for fitment verification・

✔️Competitive wholesale pricing
✔️Fast global shipping

FAQ

Q1: Which part numbers can PN 3918986 replace?

A1: 3918986 is the latest upgraded crankshaft for DCEC 6CT/6CTA mechanical pump engine.
It directly replaces:
✅ 3917320
✅ 3917443
✅ 3904363

Q2: Are you selling genuine Cummins parts?

A2: Yes. We are authorized Cummins agent in China, supply 100% genuine original parts with competitive price.

Q3: What’s the improvement compared to old 3917320?
A3: Optimized heat treatment & alloy formula, improved fatigue strength, better anti-fracture performance under impact & cyclic heavy load