Looking for 3044390 Cummins NT855 crankshaft? Factory direct 14L forged shafts for Komatsu D155 and Kenworth W900. Resists journal scoring. Ready to ship. Request quote!
Product Categories:
Product Tags:
Send us a message
The Cummins NT855 forged steel crankshaft (OEM: 3044390) is a high-tensile 14L component engineered for Big Cam engines.
It prevents journal scoring and fits equipment including Komatsu D85/D155 dozers, Kenworth W900 trucks, and Peterbilt 379 heavy haulers.
In stock for immediate global wholesale export.
The Cummins NT855 Crankshaft is the core component for the robust 14-liter, in-line six-cylinder NT series engine, widely known as the Big Cam. Designed for relentless, high-stress operation, this crankshaft translates piston motion into rotational power for diverse industrial applications. Ruich Value supplies premium, high-tensile forged steel crankshafts engineered to meet stringent OEM standards for the NTC, NTA855, and Big Cam engines, ensuring maximum fatigue resistance and durability.
Our NT855 crankshafts feature precision machining with induction-hardened fillets and journals to minimize wear, a critical feature for engines powering mining equipment, oil and gas operations, and long-haul heavy trucks. Each unit is rigorously balanced to ensure optimal engine stability and extended service life. For auto parts wholesalers and engine rebuilders, this component delivers superior power transmission integrity, safeguarding the entire assembly from premature failure across all application scenarios, including construction machinery and high-output industrial generator sets.
| Specification | Value |
|---|---|
| Product Type | Crankshaft |
| Material Grade | 42CrMo Forged Steel |
| Forging Type | Fully Forged & Precision Machined |
| Surface Treatment | Induction Hardened & Nitrided Journals |
| Main Journal Diameter | 114.26 – 114.30mm |
| Rod Journal Diameter | 79.34 – 79.38mm |
| Stroke | 152mm |
| Hardness Range | 58-62 HRC (Journals) |
| Balancing Grade | G6.3 Dynamic Balance |
| Heat Treatment | Stress Relieved & Quenched |
| OEM Reference | 3044390 |
| Cross Reference | 3066880, 206600, 3608833 |
| Typical Applications | Komatsu D155, Kenworth W900, Peterbilt 379, Cummins C300 Genset |
| Application Category | Heavy Mining, Logistics & Power Generation |
| Engine Model | Application Field | Typical Equipment Brands & Models |
|---|---|---|
| Cummins NT855 (NTC/NTA) | Construction Machinery | Komatsu D85, D155, D355 Dozers; Link-Belt/Hitachi Excavators; Shantui Loaders |
| Cummins NT855 (Big Cam) | Heavy-Duty Trucks | Kenworth, Peterbilt, Freightliner, Navistar (Classic US Truck Models) |
| Cummins NT855 (Marine) | Commercial & Recreational Marine | Fishing Vessels, Workboats, Tugboats, Yacht Support Vessels (N855/NTA855-M) |
| Cummins NT855 (G-Drive) | Industrial / Generator Sets | Cummins Power Generation Genset Models (e.g., C400D5), Oil Field Pump & Compressor Rigs |
Ruich Value is your reliable B2B supplier for genuine-quality Cummins engine parts, specifically engineered for the high demands of the NT855 platform.
Ruich Value provides a comprehensive range of genuine-quality Cummins engine components covering multiple engine models. Whether you require parts for the NT855, KTA50, or ISX series, you can explore all available models using the table below:
| Cummins Engine Model | Core Displacement (L) | Serial | Associated Models (for Cross-Reference) | Key Applications |
|---|---|---|---|---|
| B3.3 | 3.3 | B / ISB / QSB Series (Light & Mid-Range) | B3.3 (M16/18) | Skid Steer, Excavator, Forklift, Gen-Set |
| 4BT/3.9 | 3.9 | B / ISB / QSB Series (Light & Mid-Range) | 4BT3.9, 4BTA | Diesel Conversion Swap, Jeep Swap, Ford Van, Step Van |
| ISB4.5 / B4.5 | 4.5 | B / ISB / QSB Series (Light & Mid-Range) | 4ISBE, 4ISDE, ISB 4.5L Euro V | Medium-Duty Truck, Bus, Delivery Vehicle |
| 4H | 4.0 | H Series (Mid-Range) | 4H / 4HJ / 4HT | John Deere Excavators (200D/210D), Caterpillar Skid Steers (226B/232B), Komatsu Forklifts (FG20T-25), |
| 6BT / B5.9 | 5.9 | B / ISB / QSB Series (Light & Mid-Range) | 6BT5.9, 12 Valve (12V), 3965010 | Dodge Ram 1500/2500/3500 (1989-2002), Agricultural Tractor |
| ISB6.7 / QSB6.7 | 6.7 | B / ISB / QSB Series (Light & Mid-Range) | 6ISBE, 6ISDE, ISB 6.7L Euro V | Dodge Ram 2500/3500 (2007.5+), School Bus, Fire Truck |
| 6CT / ISC 8.3 | 8.3 | C / ISC / QSC Series (Mid-Range Heavy-Duty) | 6CTA, C8.3, 6D114 | Freightliner, Fire Apparatus, Motorhome (RV), Dozer |
| ISL8.9 / QSL9 | 8.9 | L / ISL / QSL Series (Heavy-Duty) | ISL, ISB 8.9L | Heavy-Duty Bus, RV Coach, Crane, Volvo/Kenworth Truck |
| M11 / ISM / QSM11 | 10.8 | M / ISM / QSM Series | - | Road Truck, Semi-Truck, Haul Truck, Gen-Set |
| NT855 | 14 | N / NT Series (Classic Mechanical) | N14, NH220 (Earlier), D85 | Peterbilt, Kenworth, Classic Truck, Heavy Equipment |
| K19 / QSK19 | 19 | K / QSK Series (High Horsepower) | KTA19, KT19 | Mining, Marine Propulsion, Drill Rig, Power Generation |
| K38 / QSK38 | 38 | K / QSK Series (High Horsepower) | KTA38, KAT38, GTA38 | Large Mining Excavator, Off-Highway, Gen-Set |
| ISF2.8 / ISF3.8 | 2.8 / 3.8 | F / ISF Series (Light Commercial) | - | Foton, GAZelle, Light Commercial Van |
| A2300 | 2.3 | A Series (Small Utility) | - | Small Gen-Set, Utility Equipment |
| ISL9 / QSL9 (6L/9.3L) | 8.9 / 9.3 | L / ISL / QSL Series | L9, ISL 9.3L Euro V/VI | Dongfeng Trucks (DFL4251), Shantui Bulldozers (SD32D), |
| NH220 | 14 | N / NT Series (Classic Mechanical) | NT855, N14, NH220 | Peterbilt 359, Kenworth W900, Classic Truck, Heavy Equipment, Vintage Tractor |
A1: Symptom: Fine cracks appearing at the rear flange or journal fillets. Diagnosis: In 14L engines used in heavy dozers like the Komatsu D155, this is typically caused by torsional vibration or prolonged operation with a failed vibration damper. Solution: Our 3044390 crankshafts are made from 42CrMo forged steel with deep induction hardening in the fillets to resist fatigue crack initiation under the extreme torque of Big Cam engines.
A2: Technical Detail: Main bearing bolt torque must be applied exactly to 405 Nm (300 ft-lb), and crankshaft end play must be verified between 0.18mm – 0.46mm. Pro-Tip: Always replace the vibration damper during a major NT855 overhaul; a worn damper is the #1 cause of crankshaft fractures in high-HP mining and logistics applications.
A3: Diagnosis: The NT855 series operates under massive peak cylinder pressures, especially in turbocharged NTA855 models. Standard cast iron cannot withstand the high-cycle fatigue of heavy-duty hauling. Our Solution: Our forging process creates a continuous grain flow throughout the 3044390 shaft. This ensures superior structural integrity required for heavy mining trucks and log loaders, preventing catastrophic shaft failure under high-torque shocks.
Secure your inventory with premium Cummins NT855 crankshafts. Contact our sales team today to discuss bulk pricing, custom specifications, or global distribution opportunities.
For Any Inquiries, please feel free to contact us, Our sales teams are always glad to support your business
