Fault Phenomenon: SANY SKT90 wide body mining truck thick black smoke from exhaust when climbing under heavy load, vehicle speed cannot increase.

Troubleshooting Process:
– Checked air filter: air filter severely clogged.
– Checked turbocharger: low turbocharger boost pressure.
– Checked injector nozzles: poor atomization or dripping.
– Checked fuel: poor quality or water contamination.

Root Cause: Extremely high dust levels in the mining area caused the air filter to not be cleaned for a long time, resulting in high intake resistance and incomplete combustion.

Required Parts: Replace primary and secondary air filter elements.