動(dong)(dong)力(li)(li)換(huan)擋(dang)變(bian)(bian)(bian)速箱的(de)(de)內(nei)部控(kong)制(zhi)機(ji)構非(fei)常(chang)(chang)(chang)精密，配合間隙(xi)小(xiao)，因此大多數動(dong)(dong)力(li)(li)換(huan)擋(dang)變(bian)(bian)(bian)速箱的(de)(de)換(huan)油(you)(you)周期(qi)通常(chang)(chang)(chang)為兩年(nian)或4萬~6萬公里。在(zai)正(zheng)常(chang)(chang)(chang)使(shi)(shi)(shi)用過程中，變(bian)(bian)(bian)速箱油(you)(you)的(de)(de)工作溫度一般在(zai)120攝氏(shi)度左(zuo)右(you)，所以(yi)油(you)(you)品質量很高，必須保(bao)持清(qing)潔(jie)。其(qi)次，傳動(dong)(dong)油(you)(you)長(chang)期(qi)使(shi)(shi)(shi)用后會產生油(you)(you)垢，可能形成(cheng)油(you)(you)泥(ni)，增加摩擦片和部件(jian)的(de)(de)磨損(sun)，還會影響系(xi)統的(de)(de)油(you)(you)壓，從而(er)影響動(dong)(dong)力(li)(li)傳遞。三是(shi)污油(you)(you)中的(de)(de)油(you)(you)泥(ni)會使(shi)(shi)(shi)各閥體內(nei)的(de)(de)閥體運(yun)動(dong)(dong)不(bu)順暢，影響油(you)(you)壓控(kong)制(zhi)，從而(er)使(shi)(shi)(shi)動(dong)(dong)力(li)(li)換(huan)擋(dang)變(bian)(bian)(bian)速箱出現異常(chang)(chang)(chang)。目(mu)前比較好(hao)的(de)(de)換(huan)油(you)(you)方(fang)法是(shi)動(dong)(dong)態換(huan)油(you)(you)，使(shi)(shi)(shi)用專(zhuan)業的(de)(de)變(bian)(bian)(bian)速箱清(qing)洗設備，在(zai)變(bian)(bian)(bian)速箱運(yun)行過程中充分循(xun)環(huan)舊油(you)(you)，待完全排干后再添(tian)加新的(de)(de)變(bian)(bian)(bian)速箱油(you)(you)，使(shi)(shi)(shi)換(huan)油(you)(you)率高達90%以(yi)上，保(bao)證良好(hao)的(de)(de)換(huan)油(you)(you)效果(guo)。粒(li)灃動(dong)(dong)力(li)(li)換(huan)擋(dang)變(bian)(bian)(bian)速箱的(de)(de)油(you)(you)液更換(huan)周期(qi)延長(chang)至2000小(xiao)時。上海45噸隧道(dao)機(ji)車動(dong)(dong)力(li)(li)換(huan)擋(dang)變(bian)(bian)(bian)速箱

動(dong)(dong)(dong)(dong)力(li)換(huan)(huan)擋傳(chuan)動(dong)(dong)(dong)(dong)系的(de)(de)后(hou)橋采用模塊化(hua)設(she)計(ji)，后(hou)橋有(you)許(xu)多(duo)中型號，對應著不同(tong)的(de)(de)變速(su)箱(xiang)(xiang)配套使用；后(hou)橋內部(bu)有(you)一級或者是(shi)(shi)兩(liang)級行星減(jian)速(su)、濕式(shi)多(duo)片(pian)制(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)器(qi)(qi)以(yi)(yi)(yi)及濕式(shi)差速(su)鎖還(huan)有(you)濕式(shi)離合器(qi)(qi)片(pian)的(de)(de)4檔(dang)轉速(su)動(dong)(dong)(dong)(dong)力(li)輸出軸。由于(yu)動(dong)(dong)(dong)(dong)力(li)換(huan)(huan)擋變速(su)箱(xiang)(xiang)是(shi)(shi)通(tong)過TCU（變速(su)箱(xiang)(xiang)控制(zhi)(zhi)(zhi)單元(yuan)）控制(zhi)(zhi)(zhi)各(ge)種電(dian)(dian)磁閥(fa)來實現(xian)各(ge)組離合器(qi)(qi)的(de)(de)充油和放油，從(cong)而實現(xian)檔(dang)位的(de)(de)切換(huan)(huan)，所(suo)以(yi)(yi)(yi)動(dong)(dong)(dong)(dong)力(li)換(huan)(huan)擋變速(su)箱(xiang)(xiang)的(de)(de)線束就(jiu)(jiu)顯(xian)得(de)尤為(wei)的(de)(de)重(zhong)(zhong)要(yao)(yao)，關于(yu)TCU需(xu)(xu)要(yao)(yao)特別(bie)強調的(de)(de)一點是(shi)(shi)，在(zai)整車上進(jin)(jin)行電(dian)(dian)焊(han)(han)作業(ye)時為(wei)了保證TCU不被強電(dian)(dian)流(liu)擊穿(chuan)，在(zai)電(dian)(dian)焊(han)(han)前需(xu)(xu)要(yao)(yao)將變速(su)箱(xiang)(xiang)TCU主線束在(zai)斷電(dian)(dian)的(de)(de)情況下從(cong)TCU上拔出；也許(xu)很多(duo)朋(peng)友會問我把總電(dian)(dian)源斷了之(zhi)(zhi)后(hou)就(jiu)(jiu)不可以(yi)(yi)(yi)電(dian)(dian)焊(han)(han)了嗎？這里鄭(zheng)重(zhong)(zhong)的(de)(de)告(gao)訴(su)大家這樣不可以(yi)(yi)(yi)，因為(wei)電(dian)(dian)焊(han)(han)實際(ji)上就(jiu)(jiu)是(shi)(shi)大電(dian)(dian)流(liu)通(tong)過發熱效應將焊(han)(han)接材料融化(hua)，所(suo)以(yi)(yi)(yi)在(zai)進(jin)(jin)行電(dian)(dian)焊(han)(han)作業(ye)時電(dian)(dian)流(liu)會穿(chuan)過導體(ti)，而車身上幾乎都(dou)是(shi)(shi)導體(ti)，所(suo)以(yi)(yi)(yi)只能(neng)是(shi)(shi)將TCU從(cong)車身上進(jin)(jin)行電(dian)(dian)氣隔離之(zhi)(zhi)后(hou)，才能(neng)**的(de)(de)進(jin)(jin)行電(dian)(dian)焊(han)(han)作業(ye)。上海45噸(dun)隧道(dao)機車動(dong)(dong)(dong)(dong)力(li)換(huan)(huan)擋變速(su)箱(xiang)(xiang)動(dong)(dong)(dong)(dong)力(li)換(huan)(huan)擋變速(su)箱(xiang)(xiang)的(de)(de)換(huan)(huan)擋是(shi)(shi)通(tong)過控制(zhi)(zhi)(zhi)油來實現(xian)的(de)(de)，所(suo)以(yi)(yi)(yi)變速(su)箱(xiang)(xiang)是(shi)(shi)否損壞(huai)可以(yi)(yi)(yi)先從(cong)油入手。

變(bian)速(su)(su)(su)箱(xiang)(xiang)采(cai)用(yong)了結(jie)(jie)(jie)構(gou)(gou)(gou)新穎的(de)動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)模(mo)式，所謂動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)，就是在(zai)換(huan)(huan)(huan)(huan)擋(dang)(dang)時不(bu)用(yong)踩離(li)合器(qi)，即不(bu)切斷動(dong)(dong)(dong)(dong)(dong)力(li)(li)流就可(ke)以(yi)進行換(huan)(huan)(huan)(huan)擋(dang)(dang)變(bian)速(su)(su)(su)。這種結(jie)(jie)(jie)構(gou)(gou)(gou)具(ju)有(you)很(hen)多(duo)優(you)越性，可(ke)提高拖(tuo)拉機(ji)(ji)的(de)動(dong)(dong)(dong)(dong)(dong)力(li)(li)性能(neng)、經濟性能(neng)和勞動(dong)(dong)(dong)(dong)(dong)生(sheng)產率；可(ke)降(jiang)低換(huan)(huan)(huan)(huan)擋(dang)(dang)時的(de)沖擊載荷；可(ke)減輕操(cao)作人員的(de)勞動(dong)(dong)(dong)(dong)(dong)強度(du)等。根據(ju)目前(qian)拖(tuo)拉機(ji)(ji)的(de)發展態勢(shi)，拖(tuo)拉機(ji)(ji)都(dou)將會普遍(bian)采(cai)用(yong)這種先進的(de)動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)機(ji)(ji)構(gou)(gou)(gou)。動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)變(bian)速(su)(su)(su)箱(xiang)(xiang)是利用(yong)液壓(ya)離(li)合器(qi)或制(zhi)動(dong)(dong)(dong)(dong)(dong)器(qi)實現拖(tuo)拉機(ji)(ji)在(zai)載荷下(xia)換(huan)(huan)(huan)(huan)擋(dang)(dang)的(de)機(ji)(ji)構(gou)(gou)(gou)。動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)變(bian)速(su)(su)(su)箱(xiang)(xiang)分定軸(zhou)齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong)(dong)(dong)(dong)和行星齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong)(dong)(dong)(dong)兩種。定軸(zhou)齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong)(dong)(dong)(dong)變(bian)速(su)(su)(su)箱(xiang)(xiang)具(ju)有(you)結(jie)(jie)(jie)構(gou)(gou)(gou)簡單(dan)、制(zhi)造容易、便于(yu)采(cai)用(yong)通用(yong)的(de)換(huan)(huan)(huan)(huan)擋(dang)(dang)離(li)合器(qi)等優(you)點。動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)可(ke)分為部分動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)和全動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)。部分動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)，即機(ji)(ji)械、動(dong)(dong)(dong)(dong)(dong)力(li)(li)混合換(huan)(huan)(huan)(huan)擋(dang)(dang)，主(zhu)要應用(yong)在(zai)定軸(zhou)輪(lun)(lun)(lun)系變(bian)速(su)(su)(su)箱(xiang)(xiang)上，全動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)多(duo)用(yong)在(zai)摩擦元(yuan)件布(bu)置(zhi)的(de)周轉輪(lun)(lun)(lun)系變(bian)速(su)(su)(su)箱(xiang)(xiang)上。因此(ci)在(zai)輪(lun)(lun)(lun)式裝載機(ji)(ji)上，至今仍是一(yi)種典型結(jie)(jie)(jie)構(gou)(gou)(gou)。行星齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong)(dong)(dong)(dong)具(ju)有(you)結(jie)(jie)(jie)構(gou)(gou)(gou)緊湊、傳(chuan)動(dong)(dong)(dong)(dong)(dong)效(xiao)率高、徑向力(li)(li)平衡等優(you)點，因此(ci)，大(da)多(duo)數動(dong)(dong)(dong)(dong)(dong)力(li)(li)換(huan)(huan)(huan)(huan)擋(dang)(dang)變(bian)速(su)(su)(su)箱(xiang)(xiang)均采(cai)用(yong)行星齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong)(dong)(dong)(dong)。

動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)到底是(shi)什么呢？動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)是(shi)換(huan)(huan)(huan)擋(dang)(dang)(dang)環節中(zhong)動(dong)(dong)(dong)(dong)力不(bu)終(zhong)斷(duan)的(de)(de)一種(zhong)有級變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)，其關鍵原理采(cai)用的(de)(de)是(shi)摩(mo)擦離(li)(li)(li)合(he)器（多(duo)見(jian)濕試、雙片構造）做為動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)液壓(ya)(ya)(ya)執行(xing)元件(jian)的(de)(de)負載換(huan)(huan)(huan)擋(dang)(dang)(dang)組(zu)織來達到。動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)因為換(huan)(huan)(huan)擋(dang)(dang)(dang)全過程簡易(yi)，且(qie)動(dong)(dong)(dong)(dong)力不(bu)終(zhong)斷(duan)，優(you)化了拖(tuo)拉機的(de)(de)控制使(shi)(shi)用性能(neng)，提(ti)升了工(gong)(gong)作(zuo)效能(neng)。正(zheng)因如此，動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)是(shi)一種(zhong)非常適宜(yi)于拖(tuo)拉機上所(suo)使(shi)(shi)用的(de)(de)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)，而且(qie)解(jie)決(jue)了傳動(dong)(dong)(dong)(dong)系統拖(tuo)拉機變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)的(de)(de)缺陷，完成了“動(dong)(dong)(dong)(dong)力不(bu)終(zhong)斷(duan)”的(de)(de)換(huan)(huan)(huan)擋(dang)(dang)(dang)方式，明顯提(ti)高了工(gong)(gong)作(zuo)效能(neng)，是(shi)當(dang)前(qian)很(hen)多(duo)拖(tuo)拉機生產商(shang)的(de)(de)較好的(de)(de)選擇變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)。完成動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)的(de)(de)重(zhong)要控制部件(jian)有動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)、拖(tuo)拉機電液控制模塊(kuai)、液壓(ya)(ya)(ya)傳動(dong)(dong)(dong)(dong)系統三(san)絕大多(duo)數；變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)的(de)(de)液壓(ya)(ya)(ya)傳動(dong)(dong)(dong)(dong)系統除(chu)對變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)強制潤滑外，還操縱換(huan)(huan)(huan)擋(dang)(dang)(dang)離(li)(li)(li)合(he)、主離(li)(li)(li)合(he)、PTO和前(qian)橋總成驅(qu)動(dong)(dong)(dong)(dong)分離(li)(li)(li)出來和融合(he)，及其制動(dong)(dong)(dong)(dong)系統的(de)(de)制動(dong)(dong)(dong)(dong)。動(dong)(dong)(dong)(dong)力換(huan)(huan)(huan)擋(dang)(dang)(dang)變(bian)(bian)速(su)(su)(su)箱(xiang)(xiang)可以(yi)在拖(tuo)拉機帶負荷工(gong)(gong)作(zuo)時換(huan)(huan)(huan)擋(dang)(dang)(dang)，換(huan)(huan)(huan)擋(dang)(dang)(dang)過程中(zhong)動(dong)(dong)(dong)(dong)力不(bu)中(zhong)斷(duan)。

動(dong)(dong)(dong)(dong)(dong)力(li)(li)換擋(dang)變(bian)(bian)速(su)(su)箱(xiang)是將發(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)的(de)(de)轉(zhuan)(zhuan)速(su)(su)一定的(de)(de)情況下(xia)(xia)，輸出(chu)不同(tong)的(de)(de)轉(zhuan)(zhuan)速(su)(su)，并且可(ke)(ke)以(yi)控制轉(zhuan)(zhuan)向。在(zai)(zai)(zai)低轉(zhuan)(zhuan)速(su)(su)時(shi)可(ke)(ke)以(yi)輸出(chu)較(jiao)大的(de)(de)扭矩(ju)，在(zai)(zai)(zai)高(gao)轉(zhuan)(zhuan)速(su)(su)時(shi)會有比較(jiao)好的(de)(de)效(xiao)(xiao)率，但扭矩(ju)較(jiao)低。所以(yi)機(ji)器在(zai)(zai)(zai)啟動(dong)(dong)(dong)(dong)(dong)的(de)(de)時(shi)候，要在(zai)(zai)(zai)低轉(zhuan)(zhuan)速(su)(su)啟動(dong)(dong)(dong)(dong)(dong)，運(yun)行起來后在(zai)(zai)(zai)切換的(de)(de)高(gao)轉(zhuan)(zhuan)速(su)(su)，保持效(xiao)(xiao)率。汽車(che)(che)動(dong)(dong)(dong)(dong)(dong)力(li)(li)換擋(dang)變(bian)(bian)速(su)(su)箱(xiang)這樣(yang)幾(ji)個作(zuo)用(yong)：改(gai)變(bian)(bian)傳動(dong)(dong)(dong)(dong)(dong)比，擴大驅動(dong)(dong)(dong)(dong)(dong)輪(lun)轉(zhuan)(zhuan)矩(ju)和(he)轉(zhuan)(zhuan)速(su)(su)的(de)(de)變(bian)(bian)化范(fan)圍，以(yi)適應經(jing)常變(bian)(bian)化的(de)(de)行駛條件(jian)，同(tong)時(shi)使發(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)在(zai)(zai)(zai)功(gong)率較(jiao)高(gao)而油耗較(jiao)低)的(de)(de)工況下(xia)(xia)工作(zuo)；在(zai)(zai)(zai)發(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)旋轉(zhuan)(zhuan)方(fang)(fang)向不變(bian)(bian)情況下(xia)(xia)，使汽車(che)(che)能(neng)倒退行駛；利(li)用(yong)空(kong)擋(dang)，中斷動(dong)(dong)(dong)(dong)(dong)力(li)(li)傳遞，以(yi)發(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)能(neng)夠起動(dong)(dong)(dong)(dong)(dong)、變(bian)(bian)速(su)(su)，并便于動(dong)(dong)(dong)(dong)(dong)力(li)(li)換擋(dang)變(bian)(bian)速(su)(su)箱(xiang)換檔或(huo)進行動(dong)(dong)(dong)(dong)(dong)力(li)(li)輸出(chu)。動(dong)(dong)(dong)(dong)(dong)力(li)(li)換擋(dang)變(bian)(bian)速(su)(su)箱(xiang)是由變(bian)(bian)速(su)(su)傳動(dong)(dong)(dong)(dong)(dong)機(ji)構和(he)操縱機(ji)構組成，需(xu)要時(shi)，還可(ke)(ke)以(yi)加裝動(dong)(dong)(dong)(dong)(dong)力(li)(li)輸出(chu)器。粒(li)灃動(dong)(dong)(dong)(dong)(dong)力(li)(li)換擋(dang)變(bian)(bian)速(su)(su)箱(xiang)支持遠程(cheng)故障診斷功(gong)能(neng)。廣(guang)東4立(li)方(fang)(fang)地下(xia)(xia)鏟運(yun)車(che)(che)動(dong)(dong)(dong)(dong)(dong)力(li)(li)換擋(dang)變(bian)(bian)速(su)(su)箱(xiang)

動力換(huan)擋變(bian)速(su)(su)(su)箱的主(zhu)要性(xing)能參數(shu)，包括發(fa)動機(ji)輸(shu)入轉速(su)(su)(su)、變(bian)速(su)(su)(su)箱輸(shu)入轉速(su)(su)(su)、液(ye)壓變(bian)速(su)(su)(su)箱輸(shu)出轉速(su)(su)(su)。上(shang)海45噸隧(sui)道(dao)機(ji)車(che)動力換(huan)擋變(bian)速(su)(su)(su)箱

汽(qi)車(che)(che)(che)在長期的(de)使用過程中，各部分都(dou)會(hui)磨(mo)損(sun)，特別是(shi)像變速(su)(su)(su)(su)箱(xiang)(xiang)這樣的(de)零(ling)件，在日常(chang)駕駛(shi)中頻繁換(huan)(huan)擋(dang)(dang)，長時間高(gao)速(su)(su)(su)(su)行(xing)駛(shi)。此(ci)時，動(dong)(dong)力(li)換(huan)(huan)擋(dang)(dang)變速(su)(su)(su)(su)箱(xiang)(xiang)的(de)零(ling)件將會(hui)磨(mo)損(sun)，其(qi)使用性能(neng)(neng)將會(hui)下降。為了讓汽(qi)車(che)(che)(che)的(de)性能(neng)(neng)更好，我們(men)應該如何保養變速(su)(su)(su)(su)箱(xiang)(xiang)？定(ding)期檢(jian)查(cha)并及時更換(huan)(huan)變速(su)(su)(su)(su)箱(xiang)(xiang)齒(chi)輪(lun)(lun)(lun)油是(shi)主(zhu)要(yao)措施，但(dan)手(shou)動(dong)(dong)變速(su)(su)(su)(su)箱(xiang)(xiang)在10萬公里行(xing)程前不(bu)需要(yao)更換(huan)(huan)齒(chi)輪(lun)(lun)(lun)油，普通車(che)(che)(che)在3萬公里左(zuo)右(you)會(hui)檢(jian)查(cha)變速(su)(su)(su)(su)箱(xiang)(xiang)油。因為動(dong)(dong)力(li)換(huan)(huan)擋(dang)(dang)變速(su)(su)(su)(su)箱(xiang)(xiang)在汽(qi)車(che)(che)(che)中起著重(zhong)要(yao)的(de)作用，我們(men)永遠不(bu)應該把它當回(hui)事。如果變速(su)(su)(su)(su)箱(xiang)(xiang)中的(de)齒(chi)輪(lun)(lun)(lun)油低于正常(chang)線，那么此(ci)時齒(chi)輪(lun)(lun)(lun)將失去(qu)潤滑作用。而且沒有油膜保護，齒(chi)輪(lun)(lun)(lun)高(gao)速(su)(su)(su)(su)旋轉。這時金屬表(biao)面產生巨大的(de)熱量，很容易(yi)磨(mo)損(sun)齒(chi)輪(lun)(lun)(lun)表(biao)面。在嚴重(zhong)情況下，齒(chi)輪(lun)(lun)(lun)表(biao)面將被燒蝕，因此(ci)齒(chi)輪(lun)(lun)(lun)不(bu)能(neng)(neng)旋轉。而且，不(bu)同的(de)變速(su)(su)(su)(su)箱(xiang)(xiang)油也會(hui)影(ying)響機(ji)器的(de)運轉。一(yi)般手(shou)動(dong)(dong)擋(dang)(dang)需要(yao)更好的(de)吸附，所以(yi)(yi)很多(duo)油的(de)粘度比較高(gao)，但(dan)是(shi)粘度過高(gao)會(hui)增加齒(chi)輪(lun)(lun)(lun)運轉的(de)阻(zu)力(li)，所以(yi)(yi)要(yao)選(xuan)擇質量稍微高(gao)一(yi)點(dian)的(de)齒(chi)輪(lun)(lun)(lun)油。上海45噸(dun)隧道(dao)機(ji)車(che)(che)(che)動(dong)(dong)力(li)換(huan)(huan)擋(dang)(dang)變速(su)(su)(su)(su)箱(xiang)(xiang)