4098998 3648618 3629276 3627642 Crankshaft For Cummins KTA50 QSK50 Engines

Product Overview：

Cummins 4098998 3648618 3629276 3627642 is a heavy-duty forged steel component built to CCEC standards for Cummins KTA50 & QSK50 engines. Forged alloy steel with nitrided journals. It minimizes engine vibration and extends service life under continuous heavy loads.It delivers reliable power transmission for mining, marine, and power generation applications.

Cross Reference & Upgrade Sequence:

3627642 (Original Crankshaft, Initial Version) → 3629276 (Structurally Optimized Version) → 3648618 (Heavy-Duty Reinforced Version) → 4098998 (Latest General Distributor Universal Part, Compatible with All Older Engine Models)

✅3627642: Early split counterweight design, basic induction hardening, for light-duty generator & marine use.
✅3629276: One-piece forged counterweights + fillet shot peening, improved oil gallery flow.
✅3648618:Thicker hardened journal layer, upgraded alloy steel for 1800HP heavy-duty machinery.
✅4098998 (Latest Replacement): Integrated ion nitriding + shot peening composite treatment, spiral oil galleries, optimized counterweight balance. Max withstand 2250HP continuous heavy load, universal fit for all generations K50 engines, top choice for mining & frac rig overhaul.

APPlication:

Suitable for mining trucks, oilfield frac rigs, high-power generators, marine engines, heavy construction machinery & railway equipment.

Why Choose Us?

✅100% genuine Cummins CCEC crankshafts with factory certification

✅Chian Cummins Supplier Competitive wholesale pricing for industrial engine rebuilds

✅In-stock inventory with fast global deliver

✅Technical support for fitment verification and installation

✅Long-term cooperation with reliable after-sales service