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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堵塞小孔或狹脹，配合間隙變小，影響閥芯移動，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)長時間處于“提升”或“壓降”位置。

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