Honeywell HON 5020 User And Maintenance Manual page 78

Next task
HON 5020 gas pressure regulator with HON 640a / HON 642a pilot
Figure
Proceed as follows:
Completing the maintenance (see page 79)
Step Description
41 Replace the O-ring with a new, greased
O-ring.
42 Lubricate the thread surfaces.
Put the lower cover back in place.
Tighten the screws in a criss-cross se-
quence. Refer to the additional tightening
torque information at the beginning of this
topic.
43 Tighten the hex flange nut (1).
Screw the spring adjuster (2) back in a bit.
The correct setpoint adjustment cannot be
carried out until before commissioning
with the pilot installed.
Maintenance
78