25
MT 235 – EN ed.2015 (Rev.A)
7.
Unscrew the nut completely and extract the spring;
8.
Remove the membrane assembly;
9.
Unscrew the nut to remove the protection disc, the membrane and the membrane support;
10. By raising and lowering them, check the proper functioning of the internal lever mechanisms;
CAUTION:
INTERNAL RELIEF ACTIVE: the O-ring must be in the lower groove of the membrane shaft, fig. 3.
INTERNAL RELIEF DISABLED: the O-rings must be in the three grooves, fig. 2
11. Remove the screws from the control head body;
