译文：
1. 取下固定泵头的4个螺丝。螺丝位置在计量泵的背面。 2. 在泵头松动之后，取下泵头之前，调节冲程长度到0%位置。可以保证电磁轴有足够的压力，保持其连接稳固，这样就可以旋下隔膜。 3. 向外拉液力端使螺丝从插孔内脱离。抓住液体端逆时针旋转。稍有些阻力，可以旋下隔膜。 4. 一旦隔膜被取下，检查计量泵的安全隔膜，确保其是完好的，没有任何损坏。安装新的隔膜，顺时针旋转背板和隔膜直到贴紧。调节背板，使漏液排出孔位于泵的{zd2}端。 5. 在隔膜安装完毕、并且背板漏液排出孔置于垂直位置之后，安装泵头。确保吸液阀与漏液排出孔对齐，液力端的螺丝与相应的4个孔对齐。 6. 旋转到冲程长度{bfb}位置。这样可以使整套部件旋转至背板漏液排出孔与泵的{zd2}端对齐。在泵运行过程中调整液力端和隔膜至合适的位置。 7. 当液力端连同背板位置调好之后，4个螺栓以对角方式拧紧，直到合适为止。完成这项工作时应用力均匀。

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原文：
1. Remove the four screws fixed pump head. Screw position in the back of the metering pump. 2. In loose pump head, the pump head removed prior to adjust the length to 0% stroke position. Magnetic axis can guarantee there is sufficient pressure to maintain their connection strong, so that you can unscrew the diaphragm. 3. Outward pull fluid from the jack inside the terminal so that screw out. To seize the liquid-side counter-clockwise rotation. Some slight resistance, you can unscrew the diaphragm. 4. Once the membrane has been removed, check the safety of diaphragm metering pumps to ensure that it is the good, without any damage. Install a new diaphragm, back and diaphragm clockwise until it closely aligns. Conditioning backplane, so that leakage discharge hole in the bottom of the pump. 5. In the diaphragm installed, and the back leakage discharge hole placed in vertical position, the installation of pump head. Ensure that the suction valve and the leakage discharge hole alignment, hydraulic end of the screw and the corresponding four holes aligned. 6. Rotated to the stroke length of the {bfb} position. This set of components can rotate to the back leakage discharge hole and pump the bottom of the alignment. In the running to adjust the hydraulic pump and the diaphragm to the right end position. 7. When the fluid-side with a good tune back here after four bolts to tighten the diagonal way, until the appropriate date. The completion of the work force should be uniform.