Honeywell HON 512 User And Maintenance Manual page 74

HON 512 with HON 650 pilot user manual
Figure Step Description
4 Take the inlet body. Remove the dia-
phragm unit.
5 Remove the compression spring.
6 Replace the O-ring (1) with a new, greased
O-ring. Follow the instructions in step 2.
7 Check the guide ring (2) for damage.
Replace it if necessary. Fill the chamber
with grease for valve sleeves (as per the
lubricant table) via the guide ring.
8 Check the compression spring for damage.
Replace it if necessary.
Place the compression spring back in the
inlet body.
9 Take the diaphragm unit. Use the sleeve (3)
as a reference. The figure on the left shows
the sealing edge (1) facing upwards. This
sealing edge features a longer chamfer (2)
than the sleeve's lower edge (4).
Maintenance
74