Maintaining The Load Limiting Stage - Honeywell HON 512 User And Maintenance Manual

8.4.5

Maintaining the load limiting stage

Falling components
Cleaning
Tightening torques
Maintaining the load
limiting stage
HON 512 with HON 650 pilot user manual
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.
When tightening fasteners, observe the following tightening torques:
Part
Socket cap screw
Proceed as follows:
Figure
Tightening torque
12 Nm (9 ft lbs)
Step Description
1 - 27 Same as in Maintaining the control stage
with a diaphragm assembly (see page 106)
28 Turn the load limiting stage. Unscrew the
socket cap screws and washers on the base
plate
29 Remove the base plate. Replace the O-ring
(1) with a new, greased O-ring.
Maintenance
Step
35
134