For CAT C7 C9 C13 C18 3306 3406 3408 Engine Crankshaft Excavator Spare Parts

The crankshaft for CAT 3406 engine is a core load-bearing component exclusively designed for heavy-duty excavators equipped with CAT 3406 diesel engines. As the "power transmission core" of the engine, it converts the reciprocating motion of pistons into rotational mechanical energy, directly driving the excavator’s working devices (such as bucket and arm) and traveling system to realize digging, lifting and other operations.

Crafted in strict compliance with CAT’s OE manufacturing standards, this crankshaft is made of high-strength forged alloy steel through precision forging and multi-stage heat treatment processes. Its structure includes main journals, connecting rod journals, crank arms and balance weights, all of which are tailored to the 3406 engine’s cylinder layout and power parameters. Each crankshaft undergoes rigorous dimensional accuracy detection (with journal roundness error ≤0.005mm), dynamic balance testing and fatigue strength verification to ensure seamless matching with the engine’s cylinder block, connecting rods and other components. It is widely applicable to large excavators in construction, mining and infrastructure projects, adapting to the high-load, frequent impact working conditions of excavators.