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旧 Sep 16th, 2018, 08:46     #1
bypassus
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默认 刹车踩下去,行程偏长。

最近买了辆二手2009年的Lincoln Navigator,只有8万公里,卖家是一手车主,记录显示除了第一年外,每年都开得很少。唯一个问题是刹车距离偏长,踩下去很长一段刹车才起作用,但最终也刹得住,只是每次刹车都要多花点时间。我现在这辆车基本是刹车一点下去就感觉有刹车起作用啦。请问有什么可能性,如何判断?
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旧 Sep 16th, 2018, 10:20   只看该作者   #2
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默认

flush brake system. change brake fluid. check brake rotors and pads.

世界因你而精彩!
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旧 Sep 16th, 2018, 13:44   只看该作者   #3
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默认

前半程感觉给出的压力很小,也不是完全没有,到后半程感觉正常。会不会是cylinder内漏?外面看不到漏的痕迹。不过我确实打算先换flush brake system,换新油,据dealer说后轮的Pad还只剩下30%,也打算换掉。最后不行再试试换cylinder。

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作者: 网事随风 查看帖子
flush brake system. change brake fluid. check brake rotors and pads.
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旧 Sep 16th, 2018, 21:30   只看该作者   #4
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默认

今天flush brake fluid, not helpful.
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旧 Sep 17th, 2018, 05:48   只看该作者   #5
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默认

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作者: bypassus 查看帖子
今天flush brake fluid, not helpful.
排气泡了没有?按手册顺序依次排气。注意顺序与车有关。有的要求从最远那个开始(即右后轮),有的车要求从最近的开始(即左前轮)。
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旧 Sep 17th, 2018, 10:06   只看该作者   #6
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默认

这种suv刹车多半都是这样,车重,惯性大,不会给你一踩就停的感觉,习惯就好。不放心送车行检查。
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旧 Sep 17th, 2018, 12:45   只看该作者   #7
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默认

后轮确实排除很多气泡,但是现在刹车没有明显变化。目前检查了刹车片,后面还有大约5MM,前面7-8MM,应该不是刹车片的问题。如何确认是不是Brake Master Cylinder的问题?

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作者: 长乘宽 查看帖子
排气泡了没有?按手册顺序依次排气。注意顺序与车有关。有的要求从最远那个开始(即右后轮),有的车要求从最近的开始(即左前轮)。
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旧 Sep 17th, 2018, 12:47   只看该作者   #8
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默认

是吗?那我去试试差不多年限的Navigator,看是不是类似的感觉。是就说明你说对了。

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作者: projects 查看帖子
这种suv刹车多半都是这样,车重,惯性大,不会给你一踩就停的感觉,习惯就好。不放心送车行检查。
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旧 Sep 17th, 2018, 15:52   只看该作者   #9
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默认

查刹车助力泵,brake assistant pump 我的林肯mkx给免费换了

Shooting 是一门技术
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旧 Sep 18th, 2018, 08:32   只看该作者   #10
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默认

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作者: bypassus 查看帖子
后轮确实排除很多气泡,但是现在刹车没有明显变化。目前检查了刹车片,后面还有大约5MM,前面7-8MM,应该不是刹车片的问题。如何确认是不是Brake Master Cylinder的问题?
熄火。踩几次刹车,到踩不动。回家睡觉。

早晨起来,能踩动吗?具体标准是10毫米。踩下不超过10毫米,就是好的。如果放一夜又能踩下去了,就有问题。

刹车片可能不好,摩擦系数不够。换好点的刹车片,五十刀以上一套的。
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旧 Sep 18th, 2018, 17:42   只看该作者   #11
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默认

第一,你的主观感受有偏差。如有可能,试开另一辆同型号车。第二,更有可能的情况是:你刹车线中有气泡。建议自己学习一下如何排气,很简单的。排气需要时间,而车行往往没有这种耐心,导致排气不彻底。第三,楼上说的方法是误传。踏板能不能踩下去和真空泵及Check Valve有关,和刹车系统其他部分无关。
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旧 Sep 22nd, 2018, 17:40   只看该作者   #12
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默认

今天更换了Master cylinder,现在感觉好一些了,至少一脚刹下去,前1/3程就有反应了,不过还是没有预想的效果。现在如果低速时刹下去,直接就有感觉有刹车了,但感觉刹车力不够,是不是排气不干净?我的小forester一点就有反应,上周本打算去dealer那里试试差不多年龄的expedition,不过没试上,试了辆几千麦的新款expedition,那车也是一点就有反应。

注:已经换过刹车油,而且四个轮位都排过气,当然老婆帮刹车,劲未必够,未必刹到底了。
检查刹车片还是足够的,但什么质量的刹车片就不知道。
现在换了Master cylinder,也是老婆帮刹车排气。

哪位有好的排气视频推荐?





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旧 Sep 24th, 2018, 03:12   只看该作者   #13
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默认

[QUOTE=bypassus;5974581]今天更换了Master cylinder,现在感觉好一些了,至少一脚刹下去,前1/3程就有反应了,不过还是没有预想的效果。现在如果低速时刹下去,直接就有感觉有刹车了,但感觉刹车力不够,是不是排气不干净?我的小forester一点就有反应,上周本打算去dealer那里试试差不多年龄的expeditio...[/QUOTE



你已经换过刹车总磅后, 仍然效果没有明显的好转, 这个问题就是没有把气排干净. 通常是要更换新的刹车油 同时将刹车管路长期集的水和旧的,变质刹车油排除到刹车系统之外; 方法一, 就是用旧的法子, 一人踩着踏板, 另一个人放空气 直至有新的刹车油出来,没有气泡为止; 方法二, 用排气压力专用工具, 效果会好而且快,这种工具.可到网上去查询订购.

此帖于 Sep 24th, 2018 20:51 被 白云黄鹤 编辑。

黄鹤知何去? 剩有游人处. 把酒酹滔滔, 心潮逐浪高!
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