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油泵噪聲過大的原因（1）過濾器或吸油管部分被堵或通過面積小。清洗濾芯或吸油管，更換合適的過濾器或吸油管是優(yōu)先選擇。（2）油箱氣孔被堵就要清洗通氣孔。（3）吸油位置太高或油箱油位太低，那就必須降低液壓泵的安裝高度或加油至油位線。（4）液壓油泵、吸油管密封不嚴(yán)，需要檢查連接處和結(jié)合面的密封性，緊固。（5）吸入氣泡。在新裝的油泵比較常見的，需要進(jìn)行空載運(yùn)行，排除空氣；吸油管與回油管隔開一定距離，使回油管口插入油面下一定的深度，不能將回油管放在油面以上。（6）油的粘度過高，這就需要檢...