Honeywell HON 512 User And Maintenance Manual page 95

Maintaining the
actuator assembly
HON 512 with HON 650 pilot user manual
Proceed as follows:
Figure Step Description
1 Unscrew the outlet body. When doing so,
make sure to unscrew the screws (1) in a
criss-cross sequence.
Please note that the spring will be exerting
a slight amount of pressure on the body.
Slowly unscrew the screws until the
compression spring's pressure is relieved.
2 Remove the outlet body (1).
3 Remove the diaphragm unit from the inlet
body.
4 Remove the compression spring.
5 Replace the O-rings (1, 2) in the inlet body
with new, greased O-rings and clean the
inlet body during the process. Check the
guide ring (3) for damage and replace it
with a new one if necessary.
Maintenance
95