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HON 5020 gas pressure regulator with HON 640a / HON 642a pilot
Figure
Step
Description
36
Use the cap to turn the diaphragm by hand
so that the marking on the diaphragm is
right between the two markings on the
body.
37
Place the valve body on the spring housing.
38
Lubricate the thread surfaces.
Check to make sure that the diaphragm
marking is still in the center position (see
step 35).
Put the upper cover (2) back in place.
Tighten the screws (1) in a criss-cross
sequence. Refer to the additional tighten-
ing torque information at the beginning of
this topic.
39
Loosen the screws and slowly and carefully
remove the lower cover.
Important! While removing the cover,
parts on the inside may fall out from the
spring housing by accident!
40
Remove the lower spring plate (3), the
compression spring (2), and the upper
spring plate (1) from the spring housing.
Lubricate the spring plates' depressions
and reinsert the parts into the spring
housing in the right order and alignment.
Maintenance
77
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