Replacement Of The Check Valve - Hitachi SAMURAI Series Service Manual

3. Servicing
Cycle components

3.3.7 Replacement of the check valve

The best way to replace the check valve is disassembling it from its location and later, unbrazing it from the pipes. Follow
the next steps for a correct disassembling:
1 Remove the thermistor (THMd).
a. Cut and remove the plastic bands that fixes
the insulation of the discharge pipe thermis-
tor (THMd).
b. Loosen the screw fixing the thermistor.
c. Remove the thermistor.
2 Remove the 4 screws of the inlet pipe flange.
3 Remoce the fixing clamp.
Inlet pipe flange
4 Screws
4 Remove the 4 screws that fixes the check valve
to its location at the discharge outlet.
5 Remove the 4 Allen screws that fixes the cover
of the check valve.
Once disassembled
6 Remove the cover of the check valve to protect
the inner parts from the heat of the blowtorch
when disassembling the pipes.
7 Remove the brazed parts using a blowtorch and
previously cooling the pipe side and the check
valve unit with wet cloth in order to avoid brazing
material enter inside the pipes.
72
SMGB0097 rev.0 - 07/2015
Plastic bands
Fixing clamp
Brazed parts
Thermistor
(THMd)
Screw
Allen screw (x4)
Screw (x4)
Flat washer (x4)
Spring washer (x4)
Brazed parts