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導(dǎo)致油液變質(zhì)；此外，油液中析出的瀝青等沉淀物還會(huì)堵塞小孔或狹脹，配合間隙變小，影響閥芯移動(dòng)，有被卡住的可能

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正確選用液壓油的粘度。3）經(jīng)常清洗濾清器，防止堵塞。4）分配器手柄不應(yīng)長(zhǎng)時(shí)間處于“提升”或“壓降”位置。

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如吸油管路油液流動(dòng)緩慢形成真空，吸入空氣；油泵吸油不足，流入油缸的液壓油量不足，致使農(nóng)具提升緩慢

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防止液壓油溫度過(guò)低。液壓油溫度過(guò)低時(shí)，由于液粘度增加，將可能引起一些故障，

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防止液壓油溫度過(guò)高。在工作過(guò)程中，如果發(fā)現(xiàn)液壓沒(méi)溫度過(guò)高，必須及時(shí)查找原因加以排除，否則將產(chǎn)生如下不良影響和后果