Maintenance
HON 670 / HON 671 Controllers Component Documentation
28
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.
Observe the tightening torques below when following the instructions in this section:
Part
Tightening torque
Step
Task
Screws of pilot spring
cover
12 Nm (9 ft lbs)
4
Replace the O-ring of the pilot
spring cover
Cap nut
15 Nm (11 ft lbs)
5
Assembling the diaphragm
system
Metal bellows screw
15 Nm (11 ft lbs)
6
Assembling the diaphragm
system
Screws of bottom cover
12 Nm (9 ft lbs)
7
Assembling the controller
Baseplate screws
8 Nm (6 ft lbs)
7
Assembling the controller
Proceed as follows:
Figure
Step
Description
1
Unscrew the 4 screws (1) on the baseplate.
2
Remove the baseplate (1).
3
Replace the 4 O-rings (1) with 4 new,
lubricated O-rings. Bear in mind that the
O-rings differ.
Note: See the appendix for the lubricants
to be used.
Cleaning
Tightening torques
Replace O-rings of the
baseplate