Replacement Of The Check Valve - Hitachi SAMURAI Series Service Manual

3 Servicing
Cycle components

3.3.8 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
thermistor (THMd).
b. Loosen the screw fixing the thermistor.
c. Remove the thermistor.
2 Remove the 4 screws of the inlet pipe flange.
3 Remove the 4 screws that fixes the check valve
to its location at the discharge outlet.
4 Remove the 4 Allen screws that fixes the cover
of the check valve.
Once disassembled
5 Remove the cover of the check valve to protect
the inner parts from the heat of the blowtorch
when disassembling the pipes.
6 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 SMGB0120 rev.0 - 11/2017
Plastic bands
Thermistor
(THMd)
Brazed
parts
Brazed parts
Thermistor
(THMd)
Screw
Inlet pipe flange
4 Screws
Allen screw (x4)
Screw (x4)
Flat washer (x4)
Spring washer (x4)