Honeywell HON 5020 User And Maintenance Manual page 53

HON 5020 gas pressure regulator with HON 640a / HON 642a pilot
Figure Step Description
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.
Reinstall the locking ring (4).
8
Lubricate the thread surfaces.
First screw the spindle (2) back into the
body.
Then slide the locknut (1) over the spindle
and tighten the locknut (1).
9 Check that the spindle is in the right
position and adjust it if necessary: The
spindle's groove must be flush with the
locknut's surface.
10 Release the tension on the pilot spring by
loosening the hex flange nut (1) and
unscrewing the spring adjuster (2) a few
turns.
11
Loosen the screws (1) and lift off the upper
lid (2).
Remove the spring (not shown) from the
cap.
Maintenance
53