起重機械發動機溫度過高的原因及排除方法

1.冷卻係統漏水或冷卻水不足;
2.水溫表指示不準或失靈;
3.冷卻係統水垢太多，散熱效果差;
4.散熱器護罩網或散熱器芯通風道被雜物堵塞，致使散熱不良;
5.水泵、風扇皮帶過鬆或折斷;
6.水泵損壞
，風扇葉片裝反或變形，風圈損壞;
7. 節溫器損壞在主閥關閉位置;
8.發動機長期超負荷運轉及供油時間過遲等。

發現了發動機溫度過高的原因，那麼我們就可以對症下藥，解決這個問題：

　    當發動機在工作中出現水溫過高故障時，應注意觀察故障現象，找出原因予以排除。首先要檢查水溫表是否失靈，若不準或失靈應更換;然後檢查水箱是否缺水，進水管、sanreqishifoupolieloushui，chucongwaibuzhijieguanchawai，haikeyongdaqidefangfalaijianzhaloushuibuwei。sanreqiloushuibuweikeyongxihanxiubu，rumougensanreguanpoliejiaozhong

，kejiangliangtoujiabiandusai。gongzuozhongfaxianyouqingweiloushui
，keyongfeizaoduzhu，daitingchehouxiuli。ruofeishangshuyuanyin，yingjinyibujianzhafadongjiketishifouyouliewen，zushuiquanshifousunhuai
，yeyaojianzhashuibengxieshuikongshifouloushui。zuihoujianzhasanreqigaidepaiqifashifoushixiao，rushixiaoyinggenghuan。

　　若非冷卻水泄漏問題，則應分兩種情況對故障進行分析排除：
1.突tu然ran性xing水shui溫wen過guo高gao。首shou先xian檢jian查zha散san熱re器qi是shi否fou過guo熱re
，如ru果guo散san熱re器qi溫wen度du過guo高gao，說shuo明ming氣qi缸gang墊dian衝chong壞huai，此ci時shi注zhu意yi檢jian查zha機ji體ti上shang平ping麵mian與yu缸gang蓋gai結jie合he麵mian是shi否fou嚴yan重zhong翹qiao曲qu變bian形xing，若ruo變bian形xing應ying及ji時shi修xiu理li。如ru散san熱re器qi溫wen度du不bu高gao，則ze說shuo明ming冷leng卻que水shui循xun環huan不bu良liang，應ying檢jian查zha風feng扇shan皮pi帶dai是shi否fou折zhe斷duan或huo嚴yan重zhong打da滑hua。若ruo正zheng常chang
，再zai檢jian查zha散san熱re器qi出chu水shui管guan是shi否fou被bei吸xi癟bie
，內nei孔kong有you無wu脫tuo層ceng堵du塞sai，查zha明ming原yuan因yin予yu以yi排pai除chu，應ying急ji的de辦ban法fa是shi在zai吸xi癟bie的de管guan內nei放fang適shi當dang大da的de彈dan簧huang支zhi撐cheng。再zai檢jian查zha節jie溫wen器qi的de膨peng脹zhang筒tong是shi否fou破po裂lie，破po裂lie應ying更geng換huan。如ru節jie溫wen器qi正zheng常chang
，則ze說shuo明ming水shui泵beng損sun壞huai，應ying認ren真zhen檢jian查zha修xiu理li水shui泵beng。

2.feituranxingshuiwenguogao。duiyubushituranchuxiandewenduguogaoxianxiang，yingtigaofadongjizhuansuguanchajiashuikoushifoufanshui，tongshizhuyishidalianghaishishaoliangfanshui。rudaliangfanshui
，qiesanreqiwendubujun，zeshuomingyouxielengqueguanbeidu，zaiyanhandedongjigengyingzhuyi。dangjiashuikoushaoliangfanshuiqiefadongjiwenduqiandihougaoshi，zebiaomingfenshuiguanyisunhuaihuodusai，yingjishigenghuan。ruofeishangshuyuanyin，kenengshilengquexishuigouguoduo，shuidaobuchang。rujiashuikouchubufanshui

，zeyingduilengquexiwaibiaojifadongjijixiebufenjinxingrenzhenjianzhafenxi。

　　首shou先xian應ying檢jian查zha百bai葉ye窗chuang是shi否fou關guan閉bi或huo開kai度du不bu足zu風feng扇shan轉zhuan動dong是shi否fou正zheng常chang，若ruo一yi切qie正zheng常chang，而er發fa動dong機ji仍reng過guo熱re
，則ze應ying檢jian查zha風feng扇shan風feng量liang。如ru風feng量liang不bu足zu，應ying調tiao整zheng風feng扇shan葉ye片pian的de角jiao度du，並bing將jiang葉ye片pian頭tou適shi當dang折zhe彎wan或huo變bian換huan風feng扇shan葉ye片pian。

　　在(zai)冷(leng)卻(que)係(xi)正(zheng)常(chang)情(qing)況(kuang)下(xia)，發(fa)動(dong)機(ji)仍(reng)過(guo)熱(re)
，則(ze)應(ying)考(kao)慮(lv)使(shi)用(yong)方(fang)麵(mian)的(de)原(yuan)因(yin)。總(zong)之(zhi)，發(fa)動(dong)機(ji)過(guo)熱(re)的(de)原(yuan)因(yin)是(shi)多(duo)方(fang)麵(mian)的(de)

，可(ke)根(gen)據(ju)具(ju)體(ti)情(qing)況(kuang)靈(ling)活(huo)運(yun)用(yong)上(shang)述(shu)方(fang)法(fa)進(jin)行(xing)檢(jian)查(zha)排(pai)除(chu)。