一顆放油螺絲竟然導致變速箱大修？實際上修理廠人員都知道，發(fā)動機和變速箱上螺絲必須先用手擰上幾圈，再用扳手或風炮緊固。那么這輛車的變速箱就是因為把螺絲擰滑絲了，隨便找了螺絲代替，結果導致變速箱大修。下面
山東變速箱維修人員為您分析下這個問題吧。
How could a drain screw lead to gearbox overhaul? In fact, the repair shop personnel all know that the screws on the engine and gearbox must be tightened by hand for several turns before being tightened with a wrench or air gun. Then the gearbox of this car was replaced by screws because of the screw slipping, which led to the overhaul of the gearbox. Next, Shandong transmission maintenance personnel will analyze this problem for you.
手動變速箱油一般是6-8W公里更換，更換方式也很簡單，拆下放油螺絲就可以了。今天這位車主是外地的，出發(fā)之前在當?shù)匾患倚蘩韽S把全車的油液全換了，結果在倒車的時候，發(fā)現(xiàn)車前地面上有一攤油。趴車底一看變速箱和發(fā)動機之間全是油。
The manual transmission oil is generally replaced at 6-8W km. The replacement method is also very simple. Just remove the oil drain screw. Today, the car owner was from another place. Before leaving, he changed all the oil in the car at a local repair shop. When reversing, he found a pool of oil on the ground in front of the car. Get under the car and look at the oil between the transmission and the engine.
聞著味道是變速箱油，因為變速箱油發(fā)臭。這種情況一般都是變速箱一軸油封密封失效。但是當我們拆下變速箱后，發(fā)現(xiàn)我判斷錯了。看下圖，有個鋼珠把殼體撐裂了。這個時候我們判斷可能是軸承內(nèi)的鋼珠脫落，但拆開變速箱后~~又發(fā)現(xiàn)我們判斷錯了。
It smells like transmission oil, because it stinks. This situation is generally caused by the failure of the oil seal of the first shaft of the transmission. But when we removed the gearbox, I found that I was wrong. As shown in the figure below, a steel ball cracked the shell. At this time, we judged that the steel ball in the bearing might fall off, but after disassembling the gearbox, we found that we were wrong.
紅色圓圈是原車的倒擋開關。兩個綠色圓圈是導致殼體碎的元兇，油底殼放油螺絲，為什么是兩部分呢？為什么這個油底殼放油螺絲會導致殼體破碎？
The red circle is the reverse gear switch of the original vehicle. Two green circles are the main culprits that cause the shell to break. Why are the oil pan drain screws two parts? Why does the oil pan drain screw cause the shell to break?
一原因：這不是原車的放油螺絲，而是一個倒擋開關。大家都知道到擋開關上都會有一個鋼珠，上圖兩個綠色圓圈一個是鋼珠一個是倒擋開關。我們分析是原車的放油螺絲擰滑絲了或者丟了找不著了，因為放油螺絲直徑都比較粗，這種螺絲不好找，結果修理廠隨便找了個粗細一樣的倒擋開關給裝了上去，也沒告知客戶。
One reason: this is not the oil drain screw of the original vehicle, but a reverse gear switch. As we all know, there will be a steel ball on the shift switch. The two green circles in the figure above are the steel ball and the reverse switch. We analyzed that the oil drain screw of the original car had slipped or was lost. Because the diameter of the oil drain screw was relatively thick, it was difficult to find this kind of screw. As a result, the repair shop randomly found a reverse gear switch of the same thickness and installed it, but didn't tell the customer.
二原因：倒擋開關長度要比原車放油螺絲長，而差速器大盤齒距離油底殼只有不到1cm的距離，過長的倒擋開關直接頂?shù)搅瞬钏倨鞔蟊P齒上。上圖兩個綠色圓圈一個是鋼珠一個是倒擋開關
The second reason is that the length of the reverse gear switch is longer than the oil drain screw of the original vehicle, and the distance between the large plate gear of the differential and the oil pan is less than 1 cm, and the long reverse gear switch is directly pushed onto the large plate gear of the differential. Two green circles in the figure above, one is steel ball and the other is reverse gear switch
安裝之前需要用汽油清洗殼體和齒輪。圓圈部分是放油螺絲口，可以看到距離大盤齒非常近。倒擋開關頂部的鋼珠被大盤齒打掉，被甩到大盤齒和變速箱殼體之間，因為齒輪堅硬，變速箱殼體是鋁的，導致殼體被頂裂后，鋼珠死死的卡在殼體上，這也是為什么變速箱并沒有異響的原因。
Clean the housing and gear with gasoline before installation. The circle part is the oil drain screw hole, which can be seen very close to the large disk gear. The steel ball on the top of the reverse gear switch was knocked off by the big plate gear and thrown between the big plate gear and the gearbox housing. Because the gear is hard and the gearbox housing is aluminum, the steel ball stuck on the housing after the housing was jacked, which is why the gearbox has no abnormal noise.
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