Changing the diaphragm 14 . Remove the six screws, holding the upper and lower pump housings together . Remove the pump lever spring Reduction valve 12 . Remove the cover of the reduction valve and check to make sure that the spring and the piston are faultless . If there are reasons to suspect a fault in the opening pressure of the reduction valve, then check the data of the spring . See under "Technical Data" - reduction valve . (1) and remove the screw (2) holding the pump lever shaft . Feed-pump 13 . Depress the pump lever . if the diaphragm of the pump sounds squeaky, the diaphragm is faultless . 15 . Use a suitable pair of pliers and removethe pump lever shaft .
Pull out the lever and the diaphragm .