Honeywell HON 512, User And Maintenance Manual

Page: 117 / 208

Maintenance
HON 512 with HON 650 pilot user manual 117
Figure Step Description
13 Remove the valve body from the spring
housing.
Screw the assembly aid (1) into the valve
insert (2).
14 Hold on to the connecting piece (1) and
pull out the valve insert (2).
Remove the connecting piece.
15 Replace the valve insert with a new one.
Insert a new, greased O-ring (1).
16 Take the connecting piece and unscrew the
hex nut.
17 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.