The 3907804 Cummins 5.9L crankshaft is engineered for Dodge Ram and Case IH. Its reinforced snout and hardened journals resist fatigue and thrust wear. Global shipping available.
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The Cummins 6BT 5.9L crankshaft (OEM: 3907804) is a heavy-duty component manufactured to meet OEM hardness specifications.
It addresses common issues like snout fatigue and fits applications including 1989-2002 Dodge Ram trucks and Case IH construction equipment.
In stock for global export.
Engineered to combat common failure modes such as snout fatigue and thrust bearing wear, each unit undergoes strict quality control including dimensional checks and magnaflux inspection. We utilize high-grade materials and induction hardening processes on all journals to ensure extended service life, restoring your B-Series engine to its original factory performance.
| Specification | Value |
|---|---|
| Product Type | Crankshaft |
| Engine Model | Cummins 6BT / ISB 5.9L |
| Material Grade | Forged Steel / High-Strength Alloy (Optional) |
| Main Journal Diameter | 97.98 mm (Standard) |
| Rod Journal Diameter | 68.98 mm (Standard) |
| Hardness Treatment | Induction Hardened Journals |
| OEM Reference | 3907804, 3908032, 3929037 |
| Cross Reference | 5.9L Crank, 12-Valve Crankshaft |
| Typical Applications | Dodge Ram 2500, Case 580L |
| Engine Model | Application Field | Typical Equipment Brands & Models |
|---|---|---|
| Cummins 6BT (12-Valve) | Automotive | Dodge Ram 2500 / 3500 (1989-1998) |
| Cummins ISB 5.9L (24V) | Automotive | Dodge Ram (1998.5-2002), Freightliner FL60 |
| Cummins 6BTA | Industrial / Construction | Case IH Excavators / Loaders, Komatsu PC200-6, Hyundai R210LC |
Ruich Value supplies a dedicated range of Cummins engine parts, including new aftermarket and remanufactured replacements. Our coverage includes popular engine families such as the 6BT/6BTA, 4BT, ISB, ISX, and NT855 series. For a complete catalog of our Cummins crankshafts, please contact our sales team.
| 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 |
Snout breakage is typically caused by a failed harmonic balancer (vibration dampener) or the KDP (Killer Dowel Pin) coming loose and jamming the gears. Our replacement 3907804 crankshafts are inspected for snout concentricity and material integrity to withstand harmonic vibrations, provided a healthy dampener is installed.
Yes, the 3907804 casting is generally compatible with both 12-valve (6BT) and early 24-valve (ISB) 5.9L engines found in Dodge Rams up to roughly 2002. However, the tone ring (reluctor ring) installation may differ. Please confirm if your engine requires a specific tone ring configuration before installation.
No, the crankshaft is supplied as a bare unit to allow you to select the precise bearing size (Standard, .010″, .020″) needed for your rebuild. We recommend pairing it with high-quality Tri-Metal bearings to ensure longevity under heavy towing or industrial loads.
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