Fault Phenomenon: Link-Belt truck crane engine emits thick black smoke, stalls even with slight load.

Troubleshooting Process:
– Checked air filter: filter clogged.
– Checked turbocharger: turbocharger impeller seized.
– Checked injection pump: excessive fuel supply.
– Replaced air filter, repaired or replaced turbocharger.

Root Cause: Turbocharger failure caused insufficient intake air, leading to incomplete combustion.

Required Parts: Turbocharger assembly, air filter element.