挖掘機剎車失靈是挖掘機維修中非常常見的需要解釋的現象，如何解決已經成為很多挖掘機迫切想知道的事情。維修挖掘機起動復合繼電器的中點信號端有電源電壓（檢查中點信號端信號的輸入是否與電源有短路現象或起動機中點輸出不正常）。挖掘機修理則閃光繼電器已損壞；當手柄開關撥到左轉或右轉時，若方向機下面的左右轉向指示燈閃爍，而挖掘機左右轉向燈不閃爍，請檢查閃光繼電器到挖掘機左右轉向燈的線束連接及負載燈是否被燒壞。挖掘機維修左右(you)轉向指(zhi)示燈(deng)工作不正常 當手柄(bing)開關撥到(dao)左轉或右(you)轉時，挖(wa)掘機左右(you)轉向燈(deng)不閃(shan)爍。請檢查左、右(you)轉向燈(deng)與(yu)閃(shan)光繼電(dian)器(qi)負載端之間(jian)的(de)線束(shu)。以(yi)下是解決方案。

    將機(ji)(ji)器可以(yi)停(ting)在一(yi)個斜坡(po)上(shang)，使上(shang)部轉(zhuan)(zhuan)(zhuan)臺回(hui)(hui)轉(zhuan)(zhuan)(zhuan)到(dao)與斜坡(po)成垂直，關閉(bi)汽車發(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)，此時(shi)(shi)(shi)(shi)如果(guo)轉(zhuan)(zhuan)(zhuan)臺未因(yin)重力(li)(li)的(de)(de)作(zuo)(zuo)(zuo)用向低(di)的(de)(de)一(yi)邊回(hui)(hui)轉(zhuan)(zhuan)(zhuan)；將制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)系(xi)統(tong)(tong)控(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)閥(fa)(fa)(fa)PG處(chu)的(de)(de)油(you)路截止(zhi)(zhi)，啟動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)發(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)，操作(zuo)(zuo)(zuo)技(ji)術先(xian)(xian)導(dao)閥(fa)(fa)(fa)，此時(shi)(shi)(shi)(shi)對于(yu)轉(zhuan)(zhuan)(zhuan)臺工作(zuo)(zuo)(zuo)無法實(shi)現回(hui)(hui)轉(zhuan)(zhuan)(zhuan)。上(shang)述(shu)研(yan)究(jiu)狀況分(fen)析說明，制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)片及(ji)彈簧之間(jian)(jian)(jian)沒(mei)有(you)(you)(you)解決問(wen)題(ti)。先(xian)(xian)導(dao)閥(fa)(fa)(fa)回(hui)(hui)位(wei)(wei)不(bu)(bu)(bu)正確或回(hui)(hui)位(wei)(wei)不(bu)(bu)(bu)及(ji)時(shi)(shi)(shi)(shi)；或換向閥(fa)(fa)(fa)6磨損，使主(zhu)泵壓(ya)(ya)力(li)(li)油(you)由磨損產生(sheng)間(jian)(jian)(jian)隙(xi)以(yi)及(ji)通(tong)過(guo)PAs進(jin)入發(fa)展先(xian)(xian)導(dao)油(you)路中(zhong)，通(tong)過(guo)梭閥(fa)(fa)(fa)3、4進(jin)入SH管路；其他不(bu)(bu)(bu)同部位(wei)(wei)有(you)(you)(you)泄(xie)漏(lou)，壓(ya)(ya)力(li)(li)油(you)由的(de)(de)AM、A1、A13、Psp等(deng)處(chu)進(jin)入SH，使制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)閥(fa)(fa)(fa)不(bu)(bu)(bu)回(hui)(hui)位(wei)(wei)，一(yi)直都是處(chu)于(yu)和(he)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)過(guo)程中(zhong)活塞(sai)接通(tong)的(de)(de)狀態(tai)，而(er)(er)PG壓(ya)(ya)力(li)(li)油(you)卻仍源源不(bu)(bu)(bu)斷不(bu)(bu)(bu)斷地(di)提高進(jin)入快速(su)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)活塞(sai)腔(qiang)(qiang)內，導(dao)致(zhi)部分(fen)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)片11分(fen)離，不(bu)(bu)(bu)能(neng)(neng)真正起(qi)(qi)到(dao)有(you)(you)(you)效(xiao)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)的(de)(de)作(zuo)(zuo)(zuo)用。在操作(zuo)(zuo)(zuo)作(zuo)(zuo)(zuo)為(wei)(wei)先(xian)(xian)導(dao)閥(fa)(fa)(fa)時(shi)(shi)(shi)(shi)，SH處(chu)的(de)(de)壓(ya)(ya)力(li)(li)為(wei)(wei)3.6MPa，停(ting)止(zhi)(zhi)生(sheng)產操作(zuo)(zuo)(zuo)具有(you)(you)(you)先(xian)(xian)導(dao)閥(fa)(fa)(fa)時(shi)(shi)(shi)(shi)，壓(ya)(ya)力(li)(li)能(neng)(neng)夠迅(xun)速(su)地(di)從(cong)3.6MPa降(jiang)(jiang)至(zhi)0，故確定根據(ju)以(yi)上(shang)所假(jia)設的(de)(de)故障點并沒(mei)有(you)(you)(you)發(fa)現問(wen)題(ti)。關閉(bi)先(xian)(xian)導(dao)閥(fa)(fa)(fa)后(hou)，由于(yu)這種調(diao)速(su)閥(fa)(fa)(fa)2的(de)(de)節(jie)流(liu)孔堵塞(sai)、制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)閥(fa)(fa)(fa)1卡滯在接通(tong)的(de)(de)位(wei)(wei)置(zhi)上(shang)，導(dao)致(zhi)整個制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)缸內的(de)(de)壓(ya)(ya)力(li)(li)我們不(bu)(bu)(bu)能(neng)(neng)為(wei)(wei)了解除，制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)保護裝置(zhi)不(bu)(bu)(bu)起(qi)(qi)作(zuo)(zuo)(zuo)用。通(tong)過(guo)學習壓(ya)(ya)力(li)(li)傳感器檢測，制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)活塞(sai)腔(qiang)(qiang)內的(de)(de)壓(ya)(ya)力(li)(li)在停(ting)止(zhi)(zhi)自己操作(zuo)(zuo)(zuo)設計先(xian)(xian)導(dao)閥(fa)(fa)(fa)后(hou)，壓(ya)(ya)力(li)(li)從(cong)3.6MPa降(jiang)(jiang)至(zhi)0，但當(dang)(dang)腔(qiang)(qiang)內的(de)(de)壓(ya)(ya)力(li)(li)為(wei)(wei)0時(shi)(shi)(shi)(shi)，轉(zhuan)(zhuan)(zhuan)臺的(de)(de)回(hui)(hui)轉(zhuan)(zhuan)(zhuan)卻依然存在不(bu)(bu)(bu)能(neng)(neng)完(wan)全停(ting)止(zhi)(zhi)。由此可確定需(xu)要調(diao)速(su)閥(fa)(fa)(fa)及(ji)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)閥(fa)(fa)(fa)沒(mei)有(you)(you)(you)社(she)會問(wen)題(ti)。在停(ting)止(zhi)(zhi)思想先(xian)(xian)導(dao)閥(fa)(fa)(fa)的(de)(de)操作(zuo)(zuo)(zuo)后(hou)，回(hui)(hui)轉(zhuan)(zhuan)(zhuan)馬達提供(gong)內部的(de)(de)油(you)壓(ya)(ya)此時(shi)(shi)(shi)(shi)又(you)起(qi)(qi)到(dao)了其中(zhong)液力(li)(li)自動(dong)(dong)(dong)(dong)(dong)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)的(de)(de)作(zuo)(zuo)(zuo)用，并與傳統(tong)(tong)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)片11同時(shi)(shi)(shi)(shi)起(qi)(qi)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)功能(neng)(neng)作(zuo)(zuo)(zuo)用，使轉(zhuan)(zhuan)(zhuan)臺的(de)(de)運動(dong)(dong)(dong)(dong)(dong)項(xiang)目停(ting)止(zhi)(zhi)。當(dang)(dang)回(hui)(hui)轉(zhuan)(zhuan)(zhuan)馬達的(de)(de)滑靴、配流(liu)盤(pan)等(deng)磨損時(shi)(shi)(shi)(shi)，本(ben)應在這些重要部位(wei)(wei)從(cong)而(er)(er)形成靜液支撐的(de)(de)油(you)膜被破壞，因(yin)密封材料性能(neng)(neng)需(xu)求(qiu)下降(jiang)(jiang)使柱(zhu)塞(sai)內的(de)(de)壓(ya)(ya)力(li)(li)油(you)通(tong)過(guo)各種磨損主(zhu)要部位(wei)(wei)信息泄(xie)漏(lou)，不(bu)(bu)(bu)能(neng)(neng)只是起(qi)(qi)到(dao)液力(li)(li)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)的(de)(de)作(zuo)(zuo)(zuo)用，致(zhi)使轉(zhuan)(zhuan)(zhuan)臺的(de)(de)制(zhi)(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)緩(huan)慢。