REXROTH叶片泵以其结构简单、使用维修方便、效率较高而成为农业上应用广泛一种水泵，但也因提不上水而令人倍感烦恼。现就提不上水这一。
1）REXROTH叶片泵有些用户水泵启动前未灌满足够水；看上去灌水已从放气孔溢出，但未转动泵轴交空气完全排出，致使少许空气还残留进水管或泵体中。
2）REXROTH叶片泵接触进水管水平段逆水流方向应用0.5%以上下降坡度，连接水泵进口一端为高，不要完全水平。向上翘起，进水管内会存留空气，降低了水管和水泵中真空度，影响吸水。
3）REXROTH叶片泵填料因长期使用已经磨损或填料压过松，造成大量水从填料与泵轴轴套间隙中喷出，其结果是外部空气就从这些间隙进入水泵内部，影响了提水。
4）进水管因长期潜水下，管壁腐蚀出现孔洞，水泵工作后水面不断下降，当这些孔洞露出水面后，空气就从孔进入了进水管。
5）进水管弯管处出现裂痕，进水管与水泵连接处出现微小间隙，都有可能使空气进入进水管。 水泵转速过低
1）人为因素。有相当一部分用户因原配电动机损坏，就随意配上另一台电动机带动，结果造成了流量少、扬程低抽不上水后果。
2）传动带磨损。有许多大型离水泵采用带传因长期使用传动带磨损而松也出现打滑现象，降低了水泵转速。
3）安装不当。两带轮中心距太小或两轴不太平行，传动带紧边安装到上面，致使包角太小，两带轮直径计
算差错以及联轴传动水泵两轴偏心距较大等，均会造成水泵转速变化。
4）REXROTH叶片泵本身机械故障。叶轮与泵轴紧固螺母松脱或泵轴变形弯曲，造成叶轮多移，直接与泵体摩擦，或轴承损坏，都有可能降低水泵转速。
5）动力机维修不录。电动机因绕组烧毁，而失磁，维修中绕组匝数、线径、接线方法改变，或维修中故障未排除因素也会使水泵转速改变。
6）吸程太大。有些水源较深，有些水源外围势较平坦处，而忽略了水泵容许吸程，产生了吸水少或根本吸不上水结果。要知道水泵吸水口处能建立真空度是有限度，真空时吸程约为10米水柱高，而水泵不可能建立真空。真空度过大，易使泵内水气化，对水泵工作不利。各离心泵都有其大容许吸程，一般3～8.5米之间，安装水泵时切不可只图方便简单。
REXROTH叶片泵因其有可变量输送、自吸能力强、可逆转、能输送含固体颗粒的液体等特点，在污水处理厂中，广泛地被使用在输送水、湿污泥和絮凝剂药液方面。螺杆泵选用应遵循经济、合理、可靠的原则。如果在设计选型方面考虑不周，会给以后的使用、管理、维修带来麻烦，所以选用一台按生产实际需要，合理可靠的螺杆泵既能保证生产顺利进行，又可降低修理成本。
1．泵转向改变，则其吸排方向也改变叶片泵都有规定的转向，不允许反。因为转子叶槽有倾斜，叶片有倒角，叶片底部与排油腔通，配油盘上的节流槽和吸、排口是按既定转向设计。可逆转的叶片泵必须专门设计。
2．叶片泵装配
配油盘与定子用定位销正确定位，叶片、转子、配油盘都不得装反，定子内表面吸入区部分易磨损，必要时可将其翻转安装，以使原吸入区变为排出区而继续使用。
3．拆装 注意工作表面清洁，工作时油液应很好过滤。
4. 叶片在叶槽中的间隙太大会使漏泄增加，太小则叶片不能自由伸缩，会导致工作失常。
5．叶片泵的轴向间隙 对ηv影响很大。
1）小型泵-0.015～0.03mm
2）中型泵-0.02～0.045mm
6．油液的温度和粘度 一般不宜过55℃，粘度要求在17～37mm2／s之间。粘度太大则吸油困难；粘度太小则漏泄严重。
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