Fuel Injector - Test/Change
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渗漏或溅溢到热表面或电气部件上的燃油会引起失火。 |
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不要让脏物进入燃油系统。 彻底清洁将要拆开的燃油系统部件的周围区域。 在拆开的燃油系统部件上安放适当的盖。 |
喷油器的喷孔易遭受磨损。 喷孔磨损是燃油污染的结果。 喷孔磨损会引起以下问题:
- 增加燃油消耗量
- 黑烟
- 不着火
- 运转不稳
如有必要,应清洗、检查、测试或更换喷油器。 关于 8S-2245 喷油器清洗工具总成的使用方法,请参阅专门说明书, SEHS7292。 请向卡特彼勒代理商咨询如何清洗和测试喷油器。
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注意 |
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切勿用钢丝刷刷或刮喷油嘴。 用钢丝刷刷喷油嘴, 或刮喷油嘴会损坏精细加工的喷油孔。 清洗和试验喷油嘴的合适工具可以从卡特彼勒代理商处获得。 |
以下几点是喷油器工作不正常的迹象:
- 发动机运转失常
- 冒黑烟
- 发动机敲缸
为了确定喷油器的故障,必须一次一个把每个喷油器分隔开来检查。
- 起动发动机。
- 把喷油泵的油管上的螺帽拧松, 一次拧松一个。 必须用一块布或类似材料防止燃油喷洒在高温的排气部件上。 在松开输油管下一个螺母之前先拧紧每个螺母。
- 当燃油管道上的一个螺帽被拧松并且出现下列情况时,可以辨认出有毛病的喷油器:
- 排气中的黑烟部分地消失, 或者完全消失。
- 发动机的运转未受影响。
应该把被怀疑有毛病的喷油器拆下来。 应该把一个新的喷油器装入气缸,以判断拆下来的喷油器是否有毛病。
拆卸和安装喷油器需要专用工具。 详细资料请参阅维修手册。 请咨询您的卡特彼勒代理商以获得帮助。
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