Honeywell HON 670 Component Documentation, Maintenance Manual And Spare Parts page 30

Replacing the O-rings of
the metal bellows
HON 670 / HON 671 Controllers Component Documentation
Proceed as follows:
Figure Step Description
1 Unscrew the 4 screws (1) of the lower
cover and lift the cover off (2).
2 Lift off the metal bellows (1) with the base
plate (2).
3 Unscrew the metal bellows (1) from the
base plate (2).
4 Replace the 2 O-rings (1) with 2 new,
lubricated O-rings.
Note: See the appendix for the lubricants
to be used.
Maintenance
30