172-65634MAJ-03 (A-DR20) 6 Oct 2021
12
Disassembling the Bellows Section
Remove the bellows from the body, then the valve stem. Pinch the straight sections
of the snap ring that is holding the spacer together using a tool such as needle-nose
pliers and remove the snap ring. Remove the spacer.
Disassembling the Valve Section
Loosen the valve seat with a wrench and remove it from the body. The coil spring is
exerting an upward pressure on the bottom of the valve seat, so be careful that the
valve seat is not thrown out. After removing the valve seat, remove the main valve,
the coil spring and the screen.
*The rubber is inlaid in the main valve and cannot be removed. The
main valve itself must be replaced.
Cleaning
After inspection and removal of any abnormality, clean and reassemble the parts.
The following parts will require cleaning before reassembly:
Threads of the adjustment handle, threads of the cover, bellows, valve stem,
main valve, valve seat, spacer (including slide bearing), screen.
It is permissible to clean using water. However, cleaning with a mild detergent is
recommended for more effective cleaning.
Valve Stem
Snap Ring
*1
Slide Bearing
*1
Spacer
Slide Bearing
*1
Snap Ring
*1
Body
Bellows
Cover Gasket
Snap Ring
*2
*1
Cannot be removed
individually as it is
incorporated with the
spacer
*
2
Insert the snap ring so
that both ends are
facing down.
Body
Screen
Coil Spring
Valve Seat
Valve Seat Gasket
Main Valve*
