Heavy-Duty Mitsubishi 6D22/6D24 Crankshaft | Kobelco SK330 | ME151230

Solving Catastrophic Snapping in 11.9L Heavy Duty Platforms

The Mitsubishi 6D22 and 6D24 11.9L inline-6 diesel engines represent the pinnacle of heavy-duty industrial power. Entrusted with driving massive 30-to-40 ton excavators like the Kobelco SK330, heavy mobile cranes from Tadano and Kato, and the Fuso Super Great commercial trucking line, these engines produce colossal low-end torque. However, the immense physical length of an 11.9L inline-6 block creates extreme torsional twisting forces along the rotating assembly. As the engine’s viscous fluid damper ages and degrades, it loses its ability to absorb these harmonic shockwaves. This frequently results in the original cast crankshaft suffering from severe metal fatigue, leading to a catastrophic snap at the front snout or first web.

Ruich Value prevents this devastating equipment failure with our premium aftermarket ME151230 replacement crankshaft. Bypassing standard casting methods, our crankshafts are forged from high-density 42CrMo steel alloy, exponentially increasing their tensile yield strength to safely absorb heavy-duty torsional loads. To combat abrasive wear from silica dust and extended oil intervals in construction environments, the massive 105mm main journals are deep-induction hardened to HRC 50-55. Whether you are rebuilding a marine genset or restoring a Kato HD1250 excavator, our dynamically balanced crankshaft guarantees maximum operational uptime and unyielding reliability.

Crankshaft Technical Specifications for Mitsubishi 6D22 / 6D24

Heavy Construction & Commercial Fitment

The Ruich Value Heavy-Duty Forged Advantage

• Snapping Immunity: The dense forged grain structure of 42CrMo steel absorbs the immense torsional spikes of 30-ton excavator hydraulic pumps, preventing fatal front snout snapping.
• Soot & Silica Defense: Heavy equipment operates in highly abrasive environments. Our HRC 50-55 induction-hardened journals resist scoring even when the oil film is challenged by soot or extended drain intervals.
• Harmonic Vibration Elimination: Because of the 140mm stroke and 11.9L rotational mass, every ME151230 crankshaft is dynamically spin-balanced, drastically extending the life of your fluid damper and oil pump.
• Drop-in OEM Fitment: Precision-ground to exact standard (STD) dimensions, ensuring perfect 105mm main bearing clearances and eliminating the need for costly machine shop modifications.
• Guaranteed Export Quality: Each heavy unit passes rigorous Magnetic Particle Inspection (MPI) to certify a completely flawless internal structure, securely bolted in wood for safe global delivery.

Complete Mitsubishi Engine Hard Parts Catalog

From the mid-sized 6D16 to the monumental 6D22, 6D24, and 8DC9 platforms, Ruich Value provides premium aftermarket components for commercial engine rebuilders worldwide. Explore our inventory below.

Discover our full selection in the Mitsubishi Parts Hub.

Request a Wholesale Quote

Partner with Ruich Value to secure reliable, factory-direct aftermarket engine components for your heavy construction equipment and commercial truck fleets. Contact our export team today for B2B pricing.