1、檢查發現水散熱器表面清潔，水溫傳感器和水溫表靈敏準確，節溫器能夠正常啟閉，發動機運轉平穩有力，但冷卻風扇轉速稍慢。
Inspection found water radiator surface clean, temperature sensors, and temperature sensitive and accurate table, the thermostat can open and close properly, smooth and powerful engine is running,but the cooling fan speed slower.
2、用壓力表檢測冷卻風扇驅動泵輸出壓力偏低，調整泵壓力調節器調整螺栓，壓力沒有變化。
The cooling fan driven by pressure gauges to detect pump output pressure is low, adjust the pump pressure regulator adjusting screw, the pressure does not change.
3、將壓力調節器拆解、清洗、檢查，未發現異常。對泵進行拆解、清洗、檢查，也未發現異常。
The pressure regulator disassembled, cleaned, inspected, and found no abnormalities. The pump dismantling, cleaning, inspection, and found no abnormalities.
4、將風扇馬達拆解、清洗、檢查，發現風扇馬達磨損嚴重，更換風扇馬達后試機，20分鐘后發動機水溫依然正常。
The fan motor dismantling, cleaning, inspection, found that the fan motor badly worn, replace the fan motor testmachine, 20 minutes after the engine temperature remained normal.