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R978894057 4WE10U3X/CW110N9K4

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R978894079 4WE10JB3X/CG24N9K4

R978894081 4WE10GB3X/CG24N9K4

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对于自吸油型柱塞泵，液压油箱内的油液不得低于油标下限，要保持足够数量的液压油。液压油的清洁度越高，液压泵的使用寿命越长。

液压泵用轴承柱塞泵重要的部件是轴承，如果轴承出现游隙，则不能保证液压泵内部三对磨擦副的正常间隙，同时也会破坏各磨擦副的静液压支承油膜厚度，降低柱塞泵轴承的使用寿命。