下面这一段英语，哪位大师帮助翻译一下！？ after tightening the two (2)jam nuts,the final installation step requires the tightening of the seal retainer nuts,leaving these nuts last, self centers the seal on the shat this aids in longer service life. 拧紧这两个拧紧螺丝之后，最后一个安装步骤需要拧紧密封护圈螺母，将这些螺母留到最后，使密封在shat上自动居中。这有助于延长使用寿命。 before replacing the belt guard, spin the flywheel one or two revolutions. lf the flywheel turns the full revolutions then the valve clearance is fine replace the guard, and the p ump is ready to run. 更换皮带保护器之前，将飞轮旋转一两转。若飞轮已转了一整圈，阀门就有足够的空隙。更换保护器，就可以开动泵。 if the pump will not make a full revolution, hen a restriction is present. the solution is s follows. 若泵不能转一整圈，那就说明有一阻碍，解决办法如下。查看更多
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