Fault Phenomenon: Clark diesel forklift when the engine is running, there is an exhaust leak sound from the exhaust manifold area, and power drops.

Troubleshooting Process:
– Checked exhaust manifold: found obvious crack.
– Checked mounting bolts: bolts loose.
– Checked gasket: gasket blown.
– Checked thermal stress: fatigue due to long-term high temperature.

Root Cause: The exhaust manifold developed fatigue cracks due to long-term thermal stress.

Required Parts: Exhaust manifold assembly and gasket.