SM-P00077-A/3
4. MAINTENANCE AND INSPECTION
71
2020-04-15
4.2.3
How to replace a cartridge type fitting (4GA/B R, 4GD/E R)
To change the push-in fitting size, check the procedure before replacing. If it is not installed correctly or if
the tightening of the mounting screws is insufficient, problems such as air leakage will occur.
◼
Body piping (4GA R) type
1
Remove the fitting stopper pin with a tool such as a screw driver.
2
Pull out the fitting.
3
Insert the replacement fitting vertically until its underside hits
against the bottom.
4
Insert the fitting stopper pin.
5
Pull on the fitting and confirm that it is installed correctly.
-
4GA1 R
-
4GA2 R/4GA3 R
◼
Body piping (4GD R) type
Remove the mounting screws.
Pull out the fitting stopper plate and fitting at the
same time.
Adjust the groove on the replacement fitting to the
fitting stopper plate and assemble them
temporarily.
Mount the fitting stopper plate and fitting at the
same time and tighten the mounting screw.
Model
Screw size
Tightening torque (N·m)
4G1 R
M1.7
0.18 to 0.22
4G2 R
M2.5
0.25 to 0.30
4G3 R
M3
0.6 to 0.7
Pull on the fitting and confirm that it is installed
correctly.
Fitting stopper pin
Remove the stopper
pin by pushing it out
from the back.
Mounting screw
Fitting stopper plate