As one of the common construction machinery in life and work, small loader greatly improves the work efficiency, but after a long time of use or careless maintenance, small loader will still have some problems, such as abnormal noise in the crankcase of loader.

小型裝載機(jī)高速運(yùn)轉(zhuǎn)時(shí)，如果出現(xiàn)“咯噔、咯噔”悶擊聲，減小油門(mén)時(shí)尤為明顯，這是主軸瓦軸向間隙過(guò)大所致；沿汽缸上下各處均有類(lèi)似小鐵錘輕擊鐵塊的聲音，排氣管冒藍(lán)煙（伴有燒機(jī)油現(xiàn)象），用長(zhǎng)柄螺絲刀抵在汽缸體處更容易聽(tīng)到，即可斷定是活塞環(huán)側(cè)隙過(guò)大或環(huán)折斷所致。

When the small loader is running at high speed, if there is a "click, click" dull sound, it is particularly obvious when reducing the throttle, which is caused by the excessive axial clearance of the main shaft pad; There is a sound similar to the sound of a small hammer tapping an iron block up and down the cylinder, and the exhaust pipe emits blue smoke (accompanied by oil burning). It is easier to hear when touching the cylinder block with a long handle screwdriver. It can be concluded that it is caused by excessive side clearance of the piston ring or broken ring.

在裝載機(jī)汽缸全長(zhǎng)部位聽(tīng)到沉悶的“空咚、空咚”敲擊聲，且打開(kāi)加機(jī)油口蓋時(shí)發(fā)現(xiàn)有氣泡（說(shuō)明有漏氣現(xiàn)象），這是活塞與缸套配合間隙過(guò)大所致；若在同一部位略靠曲軸方向聽(tīng)到“嘎、嘎、嘎”撞擊聲，則是連桿扭曲致使其在工作中搖擺產(chǎn)生的敲擊聲，后兩種聲響在改變柴油機(jī)轉(zhuǎn)速時(shí)更明顯，且較易于區(qū)別。

A dull knocking sound of "empty thump, empty thump" is heard at the full length of the loader cylinder, and bubbles are found when opening the oil filler cover (indicating air leakage), which is caused by the excessive matching clearance between the piston and the cylinder liner; If the impact sound of "GA, GA, GA" is heard in the same part slightly close to the crankshaft, it is the knocking sound caused by the swing of the connecting rod due to the distortion of the connecting rod. The latter two sounds are more obvious when changing the speed of the diesel engine and are easier to distinguish.

當(dāng)裝載機(jī)突然改變負(fù)荷時(shí)，在曲軸箱附近可清晰地聽(tīng)到短促的鈍啞的敲擊聲，并隨負(fù)荷或轉(zhuǎn)速的增加而急劇變化，響聲大，無(wú)負(fù)荷時(shí)則不明顯。這是連桿瓦過(guò)度磨損而造成連桿瓦與連桿軸頸配合間隙過(guò)大所致；若使柴油機(jī)某缸斷油，如果此異響立即消失，則說(shuō)明是該缸的連桿瓦響。

When the loader suddenly changes the load, the short dull knocking sound can be clearly heard near the crankcase, and changes sharply with the increase of load or speed. The sound is loud, but it is not obvious when there is no load. This is caused by excessive wear of connecting rod bush, resulting in excessive fit clearance between connecting rod bush and connecting rod journal; If the oil of a cylinder of the diesel engine is cut off, if the abnormal noise disappears immediately, it means that the connecting rod bush of the cylinder makes a noise.

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