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力士樂Rexroth溢流閥中先導(dǎo)型溢流閥限壓不穩(wěn)，表現(xiàn)為液壓系統(tǒng)壓力偏低或偏高，液壓執(zhí)行元件動(dòng)作無力或油管、泵體、閥體爆裂。造成此故障的原因有：壓力調(diào)整不當(dāng);先導(dǎo)閥閥芯彈簧彎曲或變軟;油液過臟或油液流動(dòng)不暢。相應(yīng)的排除措施是：重新調(diào)整;校正、加墊或更換;更換、清洗。先導(dǎo)型溢流閥限壓不穩(wěn)為漸發(fā)性故障，先導(dǎo)型溢流閥失。

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