Wholesale Mitsubishi 4D56U crankshaft (OEM 1100A135). Forged steel prevents front snout snapping for Triton L200 fleets. Factory direct global shipping.
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The Mitsubishi 4D56U 16-valve crankshaft (OEM 1100A135) is a high-tensile forged steel assembly designed specifically for Common-Rail DI-D engines. It effectively resolves front snout snapping and journal scoring, making it the definitive replacement for Mitsubishi Triton L200 and Pajero Sport fleets. In stock for global export solutions.
The evolution of the Mitsubishi 4D56 into the 16-valve 4D56U Direct Injection Diesel (DI-D) created a true powerhouse for modern light commercial vehicles and 4×4 SUVs. Powering the popular Triton L200 (KB4T) and Pajero Sport, this common-rail system produces a massive increase in low-end torque, honoring Mitsubishi’s rally-proven engineering heritage. However, this aggressive power delivery places immense torsional twisting force on the engine’s rotating assembly. In high-mileage fleets, as the harmonic balancer ages and loses its damping properties, these unchecked harmonic vibrations travel directly through the crankshaft. This notoriously causes the original cast crankshaft to suffer a catastrophic fatigue fracture, cleanly snapping the front snout and resulting in immediate engine failure.
Ruich Value provides a permanent metallurgical fix for this high-stress environment. We manufacture our 1100A135 replacement crankshafts exclusively from high-density 42CrMo forged steel alloy, vastly multiplying the tensile yield strength of the front web compared to standard factory castings. To combat abrasive wear from soot contamination inherent in diesel logistics, every main and rod journal is deep-induction hardened to HRC 50-55. Whether you are maintaining a commercial delivery fleet or rebuilding an off-road expedition vehicle, our dynamically spin-balanced crankshafts ensure your Mitsubishi returns to the field with uncompromising durability.
| OEM Part Number | 1100A135 |
|---|---|
| Cross Reference | MD377064 (Must verify 16V DI-D application vs 8V) |
| Engine Compatibility | Mitsubishi 4D56U / 4D56T (2.5L 16-Valve DI-D) |
| Material Metallurgy | High-Tensile Forged Steel Alloy (42CrMo) |
| Surface Hardness | Induction Hardened Journals (HRC 50-55) |
| Stroke Length | 95.00 mm |
| Main Journal Diameter | 66.00 mm (Standard OEM Spec) |
| Rod Journal Diameter | 52.50 mm (Standard OEM Spec) |
| Balancing Standard | Computerized Dynamic Spin-Balanced |
| OEM Brand | Application Category | Target Models (16V DI-D Variants) |
|---|---|---|
| Mitsubishi | Commercial Pickup | Triton / L200 (KB4T, KA4T platforms 2005+) |
| Mitsubishi | 4WD SUV | Pajero Sport (KH4W), Challenger, Montero Sport |
| Mitsubishi | Commercial Van | Select late-model Delica and export vans using 4D56U |
Supplying engine rebuilders and parts distributors worldwide, Ruich Value offers premium aftermarket solutions for global Mitsubishi applications. Streamline your rebuild procurement below.
| Engine Model | Main Application |
|---|---|
| S4Q | Mitsubishi Forklift, Mini Excavator, Caterpillar |
| 4D30 / 4D31 (6 Holes) | Fuso Canter, Rosa Bus |
| 4D32 (9 holes) | Fuso Canter |
| 4D33 / 4D34 | Fuso Canter FE Series, Rosa Bus |
| 4D35 | Fuso Canter |
| 4D55 | Older L200, Pajero |
| 4D56 / D4BA | L200, Pajero, Hyundai H1/H100, Delica |
| 4D56T / 4D56U | L200 Triton, Pajero Sport (Common Rail) |
| 4DR5 | Mitsubishi Jeep, Canter |
| 4G15 / 4G13 | Mitsubishi Lancer, Colt, Mirage |
| 4G54 | Pajero, Forklift, Mazda B2600 |
| 4G63 | Mitsubishi Forklift (FG25), Galant, L300 |
| 4G64 | Mitsubishi Forklift (FG25), Galant, L300 |
| 4M40 | Pajero, Delica, Triton |
| S4S | Mitsubishi Forklift, Clark, TCM Forklift |
| S6KT | CAT 320 Excavator (Rebadged 6D16) |
| S4E / S4E2 | Forklift, Marine Engine |
| S4F | Agriculture, Tractor |
| S4K | CAT Excavator (E120B), Mitsubishi |
| S6K | CAT Excavator (E200B), Mitsubishi |
| S6S | Forklift (FD35), Excavator |
| 6D14 / 6D15 | Fuso Fighter, Kato/Kobelco Excavator |
| 6D16 / 6D16T | Fuso Fighter, Kobelco SK330 |
| 6D17 | Fuso Fighter (Late model) |
| 6D31 / 6D31T | Fuso FK, Excavators |
| 6D34 / 6D34T | Fuso Fighter, Construction |
| 6D22 / 6D20 / 6D24 | Fuso Super Great, Heavy Excavator |
| 6D40 | Fuso Super Great (Heavy Truck) |
| 8DC91 / 8DC92 | Fuso Super Great, Heavy Dump Truck |
| 8DC11 / 8DC82 | Fuso Heavy Duty Truck |
| 6G72 | Pajero V6, Montero |
| 6DB1 / 6DB10 | Older Fuso Truck |
| 6M70 | Fuso Super Great (Common Rail) |
| 8PC1 / 8PE1 | Fuso Bus, Heavy Truck |
Explore more robust solutions in our Mitsubishi Parts Hub.
Catastrophic snapping is primarily caused by an undetected failure of the harmonic balancer (crank pulley). When the rubber isolation ring degrades, extreme torsional vibrations from the high-torque DI-D combustion process tear through the front crank web. Our 1100A135 forged steel crankshaft vastly increases tensile strength to resist these forces, but replacing the balancer during overhaul is mandatory.
No. The 1100A135 profile is engineered specifically for the 16-valve, Common-Rail DI-D versions of the 4D56 (4D56U) engines used in late-model Tritons and Pajero Sports. It features different internal counterweight geometries and balancing parameters compared to the older 8-valve mechanically injected engines (which use OEM MD302012 or MD377064).
Bearing spin results from oil starvation or extreme contamination. In 4D56U engines, leaking injector seals can allow combustion soot to mix directly into the engine oil, which eventually blocks the oil pickup screen. This starves the main journals, causing overheating and bearing failure. Always replace injector seals and ensure the oil pickup is clear when installing our new crankshaft.
You must use a brand-new OEM front crank bolt and torque it exactly to Mitsubishi’s strict specification (typically 170-190 Nm, though you should verify with the specific model year manual). Using an old stretched bolt or incorrect torque will cause the balancer to wobble, immediately shearing the new keyway and snapping the forged snout.
To guarantee safe global transit, we treat every 4D56U crankshaft with industrial anti-rust oil, seal it in a moisture-proof VCI barrier bag, and secure it inside a reinforced export-grade wooden crate. This process ensures your wholesale order arrives in flawless condition.
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Custom manufacturing available based on samples and drawings.
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