(1)主油泵故障: (2)油過(guò)濾器堵塞或漏; (3)油管路接頭漏油; (4)油泵連接處破裂; (5)油泵齒輪組損壞;
(1)油冷卻器水流量過(guò)??; (2)循環(huán)水進(jìn)水溫度過(guò)高; (3)油冷卻器堵塞; (4)恒溫閥失控;