禁止拉車啟動。修理挖掘機若起動復合繼電器輸出正常，則檢查起動復合繼電器輸出端到起動機之間的線束連接是否完好（測量起動機端的起動線是否有電壓）；若以上情況完全正常，可以判斷為起動機不能正常工作。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)(you)轉(zhuan)(zhuan)向(xiang)(xiang)指示燈(deng)工作不(bu)正常 當手柄開關撥(bo)到(dao)左轉(zhuan)(zhuan)或右(you)(you)轉(zhuan)(zhuan)時，挖(wa)掘機(ji)(ji)(ji)(ji)(ji)左右(you)(you)轉(zhuan)(zhuan)向(xiang)(xiang)燈(deng)不(bu)閃爍。請(qing)檢查左、右(you)(you)轉(zhuan)(zhuan)向(xiang)(xiang)燈(deng)與閃光繼電(dian)(dian)(dian)器(qi)(qi)負載(zai)端之(zhi)間(jian)(jian)的線束。禁止長時間(jian)(jian)使(shi)用電(dian)(dian)(dian)熱(re)(re)塞。火焰預(yu)熱(re)(re)器(qi)(qi)的電(dian)(dian)(dian)熱(re)(re)塞和(he)火焰預(yu)熱(re)(re)器(qi)(qi)的發熱(re)(re)體(ti)均(jun)為電(dian)(dian)(dian)熱(re)(re)絲。挖(wa)掘機(ji)(ji)(ji)(ji)(ji)維修(xiu)的耗電(dian)(dian)(dian)量和(he)發熱(re)(re)量都很大。長期(qi)使(shi)用可(ke)(ke)能(neng)會因(yin)快速放電(dian)(dian)(dian)而損壞電(dian)(dian)(dian)池，也可(ke)(ke)能(neng)會燒(shao)(shao)壞電(dian)(dian)(dian)熱(re)(re)絲。因(yin)此，電(dian)(dian)(dian)熱(re)(re)塞的連續使(shi)用時間(jian)(jian)不(bu)應超過(guo)1分鐘(zhong)，火焰預(yu)熱(re)(re)器(qi)(qi)的連續使(shi)用時間(jian)(jian)應控制在20s以(yi)內。禁止將(jiang)發動機(ji)(ji)(ji)(ji)(ji)機(ji)(ji)(ji)(ji)(ji)油直(zhi)(zhi)接添(tian)加(jia)到(dao)氣缸(gang)中(zhong)。雖然能(neng)起到(dao)密封、增壓(ya)、暖機(ji)(ji)(ji)(ji)(ji)的作用，方便柴油機(ji)(ji)(ji)(ji)(ji)冷啟動，但機(ji)(ji)(ji)(ji)(ji)油不(bu)能(neng)完全燃燒(shao)(shao)，容易(yi)產生(sheng)積碳，削弱活塞環彈性，降低氣缸(gang)密封性能(neng)。另外還會加(jia)速氣缸(gang)套(tao)的磨損，導致發動機(ji)(ji)(ji)(ji)(ji)功(gong)率下降，啟動更加(jia)困難，所以(yi)不(bu)可(ke)(ke)能(neng)直(zhi)(zhi)接給氣缸(gang)加(jia)油。

發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)在冷(leng)(leng)車機(ji)(ji)(ji)油(you)(you)(you)粘(zhan)(zhan)度的(de)(de)情(qing)況下通過拉車起(qi)動(dong)(dong)(dong)(dong)，會(hui)(hui)(hui)加劇各運(yun)動(dong)(dong)(dong)(dong)件之(zhi)間(jian)的(de)(de)磨損(sun)，從而(er)可以降低(di)我國機(ji)(ji)(ji)車的(de)(de)使用網絡壽命。挖掘機(ji)(ji)(ji)設備維修人員禁止不(bu)按(an)期換用機(ji)(ji)(ji)油(you)(you)(you)、燃(ran)油(you)(you)(you)在冬季，如果不(bu)及(ji)時(shi)換用不(bu)同(tong)粘(zhan)(zhan)度低(di)的(de)(de)機(ji)(ji)(ji)油(you)(you)(you)和燃(ran)油(you)(you)(you)，發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)就很(hen)難實現(xian)起(qi)動(dong)(dong)(dong)(dong)。禁止火(huo)烤油(you)(you)(you)底殼和進(jin)(jin)氣管處(chu)引火(huo)起(qi)動(dong)(dong)(dong)(dong)為防止企業發(fa)生(sheng)重大(da)火(huo)災，應(ying)用需要文火(huo)、煤火(huo)在一定社會(hui)(hui)(hui)距離(li)外烘烤過程中發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)的(de)(de)油(you)(you)(you)底殼，同(tong)時(shi)我們慢慢開始轉動(dong)(dong)(dong)(dong)一個曲軸，讓機(ji)(ji)(ji)油(you)(you)(you)壓力(li)均(jun)勻系統受熱(re)，使各部位都(dou)得到充分(fen)潤滑。若在工作發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)進(jin)(jin)氣管處(chu)引火(huo)起(qi)動(dong)(dong)(dong)(dong)，會(hui)(hui)(hui)使人們物(wu)質(zhi)生(sheng)活燃(ran)燒自己產(chan)生(sheng)的(de)(de)灰燼及(ji)硬(ying)雜物(wu)吸(xi)進(jin)(jin)氣缸(gang)，造成進(jin)(jin)、排氣門處(chu)于關閉控制不(bu)嚴(yan)而(er)加快推動(dong)(dong)(dong)(dong)氣缸(gang)的(de)(de)磨損(sun)。禁止無冷(leng)(leng)卻(que)液(ye)或加入(ru)沸水起(qi)動(dong)(dong)(dong)(dong)汽車發(fa)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)不(bu)能起(qi)動(dong)(dong)(dong)(dong)后再(zai)加冷(leng)(leng)卻(que)液(ye)，會(hui)(hui)(hui)使他們熾熱(re)的(de)(de)缸(gang)套、缸(gang)蓋等重要組成部件因(yin)驟然遇(yu)冷(leng)(leng)而(er)炸裂或變形(xing)；向冰冷(leng)(leng)的(de)(de)機(ji)(ji)(ji)體內驟加lOO℃的(de)(de)開水，同(tong)樣會(hui)(hui)(hui)激裂缸(gang)蓋和機(ji)(ji)(ji)體，應(ying)待冷(leng)(leng)卻(que)液(ye)沒(mei)有溫度影響降至(zhi)60~70℃時(shi)再(zai)加入(ru)。

禁止直接(jie)將汽(qi)油(you)灌入進氣管(guan)汽(qi)油(you)的(de)燃(ran)點(dian)較柴油(you)低，比柴油(you)先(xian)燃(ran)燒。因此直接(jie)將汽(qi)油(you)灌入進氣管(guan)，會使(shi)發(fa)(fa)(fa)(fa)動(dong)機(ji)(ji)工作粗暴而產生(sheng)強烈(lie)的(de)敲(qiao)缸現象，嚴重時(shi)(shi)還可發(fa)(fa)(fa)(fa)生(sheng)發(fa)(fa)(fa)(fa)動(dong)機(ji)(ji)反(fan)轉(zhuan)。禁止長時(shi)(shi)間連續起(qi)動(dong)發(fa)(fa)(fa)(fa)動(dong)機(ji)(ji)上的(de)起(qi)動(dong)機(ji)(ji)是(shi)在(zai)低電壓、大電流的(de)情(qing)況下工作的(de)，長時(shi)(shi)間使(shi)用會損(sun)(sun)壞蓄(xu)電池。其連續工作的(de)時(shi)(shi)間不(bu)得超過lOs；一次起(qi)動(dong)不(bu)行，應隔15s再起(qi)動(dong)。禁止剛(gang)起(qi)動(dong)就(jiu)高(gao)(gao)速(su)運(yun)轉(zhuan)發(fa)(fa)(fa)(fa)動(dong)機(ji)(ji)剛(gang)起(qi)動(dong)時(shi)(shi)，機(ji)(ji)油(you)的(de)溫度低、流動(dong)性(xing)差,馬上高(gao)(gao)速(su)運(yun)轉(zhuan)，易造成(cheng)各運(yun)動(dong)部件因缺乏潤滑而急劇磨損(sun)(sun)，嚴重時(shi)(shi)還會發(fa)(fa)(fa)(fa)生(sheng)燒瓦抱軸。