Maintenance
HON 512 with HON 650 pilot user manual
106
8.4.2
Maintaining the control stage with a diaphragm assembly
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 fasteners (screws, washers, etc.) 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
Tightening torque
Step
Hex nut
12 Nm (9 ft lbs)
13
Closing cap
20 Nm (15 ft lbs)
18
Base plate screws
12 Nm (9 ft lbs)
31
Proceed as follows:
Figure
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 (1) and lift off the upper
cover (2).
Falling components
Cleaning
Tightening torques
Maintaining the
control stage
Summary of Contents for HON 512
Page 185: ...Appendix HON 512 with HON 650 pilot user manual 185 X Fail to open version Y Amplifying valve ...
Page 205: ...Appendix HON 512 with HON 650 pilot user manual 205 ...
Page 206: ...Appendix HON 512 with HON 650 pilot user manual 206 ...
Page 207: ...Appendix HON 512 with HON 650 pilot user manual 207 ...