Honeywell HON 512, User And Maintenance Manual

Page: 88 / 208

Maintenance
HON 512 with HON 650 pilot user manual 88
Figure Step Description
12 Slide the diaphragm plate (1) downwards
and remove the sleeve (2). Use a rubber
mallet if necessary.
13 Check the sleeve’s sealing edge (1) for
notches/damage. If necessary, replace the
sleeve with a new one.
See step 15 for reference.
14 Replace the O-ring (2) in the diaphragm
plate with a new, greased O-ring and clean
the diaphragm unit during the process.
Remove the old, used diaphragm (1).
15 Slide the sleeve (2) back into the dia-
phragm plate (1).
Make sure that the sealing edge is facing
upwards. See step 15 for reference.
16 Take a new diaphragm that has not yet
been unfolded and grease it.