QC002124
Crankshaft Key
Mitsubishi FUSO®

A crankshaft key with the part number QC002124 is a small but crucial component of an engine's crankshaft assembly. It is a rectangular metal piece that fits into the keyway of the crankshaft and helps secure it to the flywheel or harmonic balancer. The key is designed to prevent slippage between these components and ensure that they rotate together as a single unit. Without a properly installed crankshaft key, the engine's timing and balance could be thrown off, resulting in poor performance or even catastrophic failure. As such, this seemingly minor part plays an important role in keeping a truck's engine running smoothly and reliably.