Honeywell HON 5020 User And Maintenance Manual page 61

Cleaning
Tightening torques
Maintaining the pilot
HON 5020 gas pressure regulator with HON 640a / HON 642a pilot
Observe the following cleaning instructions:
 Before assembly, all parts must be cleaned in order to remove any foreign particles
(swarf) and soiling.
 If screws, bolts, or washers are replaced with identical new parts, any oil on these new
parts must first be removed.
Observe the tightening torques below when following the instructions in this section:
Part
Closing cap
Cylinder screws
Hex bolt
Hex bolt
Proceed as follows:
Figure
Tightening torque
20 Nm (15 ft lbs)
6 Nm (5 ft lbs)
12 Nm (9 ft lbs)
12 Nm (9 ft lbs)
Step Description
1
Remove the locking screw (1) by unscrew-
ing it.
2 Remove the O-ring (2) and replace it with a
new one.
3 Check the filter cartridge for damage and
replace it with a new one if necessary.
4
Lubricate the thread surfaces. Re-install the
filter insert.
5 Unscrew the spacer nut (1) on the spindle
(2) out from the body.
6 Remove the spindle (2) by unscrewing it.
Remove the O-ring (3) and the locking ring
(4).
7 Replace the O-ring (3) with a new, greased
O-ring.
Put the locking ring (4) back in place.
Maintenance
Step
31
43
47
49
61