MRV
11
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3- Take out the upper part with the cover (2), the spring (7) , the spring guide (6). Do not separate
the cover (2) from the upper part (15) unless strictly required, to do so loose and unscrew the
screws (24)
4- With a monkey wrench remove the self clocking nut (8) and pull out the upper flat (9)
5- Remove the diaphragm (10) inspect the surface, clean it and replace if necessary or in case of
scratches, damages
6- Loosen and remove the screws (26) holding the body (1) to the lower part (16)
7- Remove the diaphragm lower disk (11) from the shaft (13), paying attention not to damage the
o-ring (12)
8- Pull up the lower part (16) and unscrew the shaft (143) from the obturator holder (18) paying
attention not to scratch its surface (use aluminum clamps or materials suitable for it on the grip),
failing in doing so would generate too much friction for the pilot to operate properly
9- Remove the tap (22) paying attention not to damage the o-ring (23)
10- Remove the obturator (20) from the obturator holder (18)
11- Inspect the plane gasket (21)
12- Inspect the seat (19) making sure no sign of damages, scratches or corrosion are present, if
necessary remove it using a 13 tube key
Inspection and repair
During these operations carefully check every detail to find damage, in particular the
diaphragm and the sealing seat gasket. The pilot is very sturdy and the materials are
designed to guarantee many years of working conditions for which, generally, it is
sufficient to remove the deposits and make sure to keep the metallic internal components
properly lubricated. If that is not enough we strongly recommend you to contact our technical
support or order the maintenance kit.
Reassembly
To reassembly the pilot you have to repeat, obviously in reverse sequence, the same steps
specified in the disassembly phase, while paying attention to:
- use Loctite 50 ( thread lock suitable for disassembly so not too strong) for all the threaded parts
without o-ring
- Inspect clean and repair if necessary every component , in particular those exposed to the
contact with water and responsible of the water tightness
