Yuchai YC6A Series, Operation & Maintenance Manual, Page: 95 / 99

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again when the oil temperature is normal.
② 溢流阀堵塞
Clogged overflow valve
检查、清洗。
Check and clean.
5.7 润滑油消耗高、消耗量大
High Lubricating Oil Temperature and Bigger Consumption Quantity of Oil
故 障 原 因
Cause
排 除 方 法
Solution
① 外部润滑油管路有泄漏
Lubricating oil
leakage in external oil pipeline
检查并修复。
Check and repair.
②
发动机负荷过重 Too heavy engine
load
降低负荷。 Decrease the load.
③ 使用润滑油牌号不当
Improper brand
of lubricating oil used
按规定选用。
Use the oil as specified.
④ 活 塞 环 卡 死 或 磨 损 过 大
Clogged
piston ring or its excessive wear
检查、修复、必要时更换。
Check and repair; replace as necessary.
⑤ 缸孔磨损过大
Excessive wear of the cylinder bore
镗缸后换加工尺寸的活塞环，或加修理用缸套。
After cylinder boring replace the piston ring with
newly machined sizes, or repaired cylinder liner.
⑥ 气门导管磨损过大，气门杆密封失效
Excessive wear of the valve guide pipe,
and failed sealing of valve stem
检查、更换。
Check and replace.
5.8 出水温度过高
Water outlet temperature too high
故障原因
Cause
排除方法
Solution
⑴ 冷却水量不足，水流量过小
Inadequate
cooling water, water flow too little
检 查 冷 却 水 量 是 否 足 够 ， 不 足 就 添 加
; Check
whether there is enough cooling water; Fill water if
inadequate
⑵ 皮带是否过松
Belt too loosed
调整
Adjust
⑶ 水泵有漏水
Water leak of the water
pump
及时进行修理
Repair
⑷ 节 温 器 失 灵 、 损 坏 Malfunction or
damaged thermostat
检查更换 Check and replace
⑸ 水温表损坏，水温感应塞失灵
Water gauge damaged, malfunction of
检查实际温度与表指示温度是否相符
;
如不符则更换
感 应 塞 或 水 温 表 Check whether the actual