This section describes how to replace the Roots pump shaft seal
1、Take off the Roots pump motor
2、Take off the pump end coupling
3、Take out the shaft seal box
4、Take out the old shaft seal in the shaft seal box and replace the new shaft seal
5、Put back into the shaft seal box
6、Put back into the pump end coupling
7、Put back into the motor
8、Add new oil into the oil cup
