Maintenance
HON 5020 gas pressure regulator with HON 630 pilot
57
Proceed as follows:
Figure
Step
Description
1
Release the tension on the pilot spring by
loosening the hex flange nut (1) and
unscrewing the spring adjuster (2) a few
turns.
2
Loosen the screws (1) and lift off the upper
cover (2).
3
Unscrew the fitting (1) on the upper cover.
Replace the sealing ring (2) with a new,
greased sealing ring.
Lubricate the thread surfaces.
Screw the fitting (1) back in.
4
Remove the spring from the cap.
5
Unscrew the cap (1) while using an
open-end wrench to hold the diaphragm
plate (2) in place so as to prevent the
components from turning.
Replace the O-ring (3) in the cap with a
new, greased O-ring.
Maintaining the
control stage
