Fault Phenomenon: Komatsu D155AX dozer shortly after operation, the torque converter oil temperature alarm sounds, machine automatically reduces speed.

Troubleshooting Process:
– Checked cooler: torque converter oil cooler clogged.
– Checked stator: stator one-way clutch slipping and generating heat.
– Checked oil level: level too low or too high.
– Checked fan: cooling fan speed insufficient.

Root Cause: The stator one-way clutch inside the torque converter is worn and slipping, generating excessive heat, combined with low cooler efficiency, leading to overheating.

Required Parts: Repair torque converter one-way clutch and clean cooler.