Honeywell HON 512, User And Maintenance Manual

Page: 131 / 208

Maintenance
HON 512 with HON 650 pilot user manual 131
Figure Step Description
28 Replace the O-ring (1) with a new, greased
O-ring.
29 Take the spring housing. Replace the O-ring
(1) at the top of the spring housing with a
new, greased O-ring.
30 Insert the unit consisting of the valve body
and the metal bellows back into the spring
housing.
31 Lubricate the thread surfaces. Tighten the
screws (1), including the corresponding
washers, from the underside of the spring
housing. Observe the tightening torque
information provided in the table before
this section.
32 Lubricate the upper spring plate’s depres-
sions (2).
Reinsert the upper spring plate (2) and the
compression spring (1) into the spring
housing in the right order and alignment.