Honeywell HON 5020, User And Maintenance Manual

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Maintenance
HON 5020 gas pressure regulator with HON 630 pilot 53
8.5 Maintaining the pilot
Topic Page
Disassembling the pilot and maintaining the base plate 53
Maintaining the control stage with a diaphragm assembly 56
Maintaining the control stage with a metal bellows assembly 63
Maintaining the control stage with a larger diaphragm assembly 72
Maintaining the load limiting stage 82
Maintaining the fine mesh filter 85
Reassembling the pilot 87
8.5.1 Disassembling the pilot and maintaining the base plate
Crush and impact hazard posed by components falling or toppling over accidentally.
When working with heavy components that have been removed or are yet to be installed,
injury may result if the components start moving in an uncontrolled manner, e.g., fall
down
from the working surface or topple over.

Place removed components exclusively on level, horizontal working surfaces with enough
load-bearing capacity.

If necessary, secure removed components so that they will not fall or topple over.

Wear the required personal protective equipment.

Exercise caution when performing the relevant tasks.
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.
Proceed as follows:
Figure Step Description
1 Unscrew the 4 screws (3) between the
control stage (1) and the base plate (2) and
remove the control stage.
Contents
Falling components
Cleaning
Disassembling the pilot
and maintaining the base
plate