OEM 3073707 Cummins M11 crankshaft fits ISM and QSM11 engines including Kenworth T800 and Freightliner Century. Premium forged steel with induction hardening. Solves torsional fatigue. Quality guaranteed. Contact us!
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Heavy-duty industrial crankshaft for Cummins M11, ISM, and QSM11 11L engines in hauling and construction applications.
Forged steel with induction-hardened journals – prevents torsional fatigue.
Fits equipment including Kenworth T800, Freightliner Century, and Hyundai HX480 excavators.
Factory direct supply.
The Cummins M11 Crankshaft is the core rotating assembly component for the dependable 10.8-liter M11, ISM, ISMe, and QSM11 diesel engine series. Specifically engineered to handle the high torque output required by heavy-duty on-highway trucks and demanding industrial applications, our crankshaft ensures the longevity and performance your fleet requires.
Manufactured using high-strength forged steel, this M11 replacement crankshaft (OEM 3073707) is precision-ground and dynamically balanced. Its robust design is crucial for maintaining low vibration and high efficiency in vocational vehicles, construction machinery, and commercial marine vessels. Engine rebuilders and parts distributors trust our component quality to meet strict OEM standards for metallurgy and dimensional accuracy.
| Specification | Value |
|---|---|
| Product Type | Crankshaft |
| Material Grade | 42CrMo Forged Steel |
| Forging Type | Fully Forged & Precision Ground |
| Surface Treatment | Induction Hardened & Nitrided Journals |
| Main Journal Diameter | 114.26 – 114.30mm |
| Rod Journal Diameter | 76.16 – 76.20mm |
| Stroke | 147mm |
| Hardness Range | 56-62 HRC (Journals) |
| Balancing Grade | G6.3 Dynamic Balance |
| Heat Treatment | Stress Relieved & Quenched |
| OEM Reference | 3073707 |
| Cross Reference | 3401490, 3073708, 3073715 |
| Typical Applications | Kenworth T800, Freightliner Century, Volvo VNL, Hyundai HX480 |
| Application Category | Class 8 Heavy Trucks & Heavy Construction |
| Engine Model | Application Field | Typical Equipment Brands & Models |
|---|---|---|
| Cummins ISM / M11 | Heavy-Duty Trucks / On-Highway | Freightliner Century/Columbia, Peterbilt 379/387, Kenworth T800, Various vocational vehicles |
| Cummins ISM / M11 | Construction & Industrial Machinery | Komatsu HD Haul Trucks, Large Excavators, Mobile Cranes, Oil & Gas Field Equipment |
| Cummins QSM11 | Commercial Marine & Power Generation | Tugboats, Workboats, Large Commercial Generator Sets (Genset models) |
Ruich Value provides a comprehensive range of genuine-quality Cummins engine components covering multiple engine models. 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: Sudden shaft snapping near the front snout or web cracking. Diagnosis: The M11 and ISM engines utilize high-pressure unit injectors driven by the camshaft, which transmits extreme pulsating gear loads back to the crankshaft. If the viscous vibration damper degrades, this torsional vibration will rapidly exceed the fatigue limit of standard steel. Solution: Our 3073707 replacement crankshafts are fully forged from 42CrMo steel with optimized grain flow and deep fillet nitriding to absorb extreme torsional spikes in heavy haulers like the Kenworth T800.
A2: Technical Detail: Main bearing cap bolts must be torqued in a specific inner-to-outer sequence to 170 Nm (125 ft-lb) plus 90 degrees. Crankshaft end play must fall strictly between 0.13mm and 0.43mm. Pro-Tip: Never install an ISM/M11 crankshaft without verifying the backlash of the front gear train (typically 0.08mm – 0.33mm); improper gear lash will destroy the crankshaft snout within a few hundred hours.
A3: Diagnosis: Industrial QSM11 engines running in dusty environments or steep-angle excavations (e.g., Hyundai excavators) often experience momentary oil starvation, leading to abrasive journal scoring. Our Solution: We implement induction hardening to achieve a surface hardness of 56-62 HRC on all main and rod journals. This ensures the 3073707 shaft can survive minor particulate contamination and marginal lubrication scenarios without tearing the bearing material.
Secure your inventory with premium Cummins M11 crankshafts and heavy-duty engine components. Contact our sales team today to discuss bulk pricing, custom specifications, or global distribution opportunities.
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