MAN Crankshaft 51021006179

About this part

Genuine MAN crankshaft for the D3872, the 30-litre V12 that sits at the top of MAN's marine range at up to 1,618 kW. A crankshaft's duty scales with the torque it carries, so on the largest engine in the line-up the main and rod journals work harder than on any other block MAN builds — which makes oil condition, rather than hours run, the thing that usually decides how long the shaft lasts. Contaminated oil, or a bearing already on its way out, scores the journal surface; the standard response is to grind that journal to a defined undersize and run matching oversize shells, not to condemn the shaft. The exception is fatigue cracking under sustained load, which cannot be ground out and takes the crank out of service permanently. On a V12 of this output, crack-testing a shaft before it goes back in is time well spent.

Supplied new, in the manufacturer’s packaging, with our warranty of up to 24 months.

Engines this part fits