Genuine Crankshaft 3648630 /3648638 For Cummins Diesel Engine K38 KTA38 K50

Original Part Number: 3648630 (Derivative Suffix Version: 3648630‑20)
Official English Part Name: CRANKSHAFT, ENGINE
Chinese Product Name: Engine Forged Crankshaft
Compatible Engines: KTA38, QSK38‑C1050, KTA38‑G2/G4/G5/G9
Net Weight: 312 kg
Wooden Packaging Overall Dimensions: 240cm × 35cm × 34cm
Material: High-strength alloy steel forging; crank journal surface high-frequency hardened, hardness range HRC45‑50
Structural Form: Full-support crankshaft, equipped with main journals, connecting rod journals, crank pin, integrated balance weights, front drive shaft, rear flywheel mounting flange
Compatible Equipment: Mining dump trucks, fracturing trucks, large generator sets, mining engineering machinery, marine power units
Interchangeable Part Numbers: 3648631, 3648629

1. Convert the reciprocating linear power of the piston into rotational mechanical energy for external output;

2. Drive auxiliary transmission components such as the gear chamber, oil pump, and fuel pump;

3. Bear all the explosive loads of the engine, and rely on balance weights to reduce operational vibrations.

1. Journal wear, abrasion, and burnt bearings;

2. Crankshaft bending, twisting, and fatigue cracks;

3. Abnormal low-frequency engine vibration and unusual noise during operation;
Frequent damage to main bearings and connecting rod bearings.

Cummins diesel engines equipped with this crankshaft are widely used in:

Construction: Powers large excavators, cranes, and other machinery for efficient site operations.

Mining: Supports stable performance in heavy-duty trucks and loaders.

Power Supply: Enables quick startup and stable power output in backup generators.