Yuchai YC6A Series, Руководство по эксплуатации и техническому обслуживанию

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机油泵将油底壳的润滑油经集油器滤网过滤后泵入主油道，主油道沿气缸体纵向布置，润
滑油经机油滤清器座用油管引至水冷式机油冷却器，利用水与油的热交换对机油进行冷却后再
用油管引回机油滤清器座，并进入机油滤清器过滤后进入分油道向主轴承供油，并通过曲轴上
的油道润滑连杆轴承和凸轮轴轴承，从凸轮轴第二、第五道及相应的两条连接油管间歇地引向
摇臂轴总成，以便润滑摇臂轴衬套和气门间隙调整螺钉，然后机油沿推杆向下流至挺柱，多余
的机油经气缸盖上的推杆孔、气缸体上的空腔流回油底壳。齿轮等其余运动件的润滑靠曲轴转
动时曲拐搅动机油引起机油的飞溅进行润滑。
The lubricating oil in the oil pan flows over the filter net and the oil pump delivers the oil to
main oil path; the main oil path is arranged vertically along the cylinder block; the oil pipe
leads the lubricating oil through oil filter seat to water cooled oil cooler, the oil is cooled down
utilizing the heat exchange of water and oil; then the oil returns to the oil filter seat and enters
into sub oil path to supply oil to main bearing after filtering, meanwhile, the oil lubricates the
connecting rod bearing and camshaft bearing through oil path on the crankshaft.; the oil is
lead to rocker arm shaft assembly through camshaft 2nd , 5th path and 2 connecting oil paths
to lubricate rocker arm bushing and valve clearance adjusting screw. Then, the oil flows to
the tappet along the pushing lever and extra oil will return to oil pan through push rod hole on
the cylinder cover and cavum on the cylinder block. Crank stirs the oil splattering to lubricate
other moving parts when the crankshaft rotates.
在使用时应定期检查油底壳内油面的高度，油面高度应保证置于油标尺上下刻度之间（图
2—25
）。油底壳下部设有放油螺塞，供更换机油时放油用。机油冷却器为水冷式，根据不同的