Honeywell HON 5020 User And Maintenance Manual page 64

Cleaning
Tightening torques
Maintaining the
control stage
HON 5020 gas pressure regulator with HON 630 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
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 and lift off the upper
cover.
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.
Maintenance
Step
21
31
35
37
64