Honeywell HON 512 User And Maintenance Manual page 108

HON 512 with HON 650 pilot user manual
Figure Step Description
8 Remove the valve body from the spring
housing.
Screw the assembly aid (1) into the valve
insert (2).
9 Hold on to the connecting piece (1) and
pull out the valve insert (2).
Remove the connecting piece.
10 Replace the valve insert with a new one.
Insert a new, greased O-ring (1).
11 Take the connecting piece and
unscrew the hex nut.
12 Remove the diaphragm plate (1) and the
diaphragm (2).
Replace the diaphragm (2) and the stem
seal (3) with new ones.
When inserting the new diaphragm in
place, make sure that it is aligned correctly:
The side of the diaphragm that has a
depression at the center should be facing
upward.
Maintenance
108