Installation, Operating & Maintenance instructions
PAGE 6
+30¡
After another 30¡ rotation the
pistons are ejected from the body
Pistons Disassembly
4
4.1
Looking at the actuator as shown to the left, withdraw
the left of each pair of stroke adjustment screws (19)
approximately 6-10 mm outward. This will enable the
stop to rotate beyond its 90
°
limit so the pistons can
come out. It may require a little force to release the
adjustment screws
as they are assembled with a thin
layer of Loctite® 221.
4.2
Grip the actuator body with both hands and rotate it
in the CW direction to eject the 4 pistons out of their
cylinders. The 4 pistons will
eject out of the actuator
body as demonstrated to
the right.
4.3
Remove the piston O-rings (3) by pressing them slightly
from both sides of the
piston, creating a loop and
pull them out of their groove.
Do not use a sharp object
to pry them out.
4.4
Push the four pads (18) in towards the pinion with a
tool and remove them from body.
Note: Usually it is not required
to remove the pads.
3.5
Follow the same routine on all four cylinders.
To replace the spring configuration or to convert to
DA actuator, go to Section 6 for assembly.
Pinion Disassembly
5
Pinion Disassembly
For C45 to C75 go to section 7.0
5.1
Remove the indicator (21). Use a two screwdrivers to
pry it off the pinion. Do not apply force on the indicator.
5.2
Remove the circlip (17).
5.3
Push the pinion (12) down and remove it from the
body.
5.4
The stop plate (13), bottom bearing (14) and pinion
Pinion Disassembly
5
O-ring (15) will drop out with the pinion. There is no need
to separate the stop from the pinion. Make sure the
stop and pinion stay together in the same orientation
they came out.
5.4
Remove the disc bearing (16), upper bearing (14) and
O-ring (15) from the body.
Namur Cover
Side
Top View
Side View
Left
screw
Left
screw
0¡
As the body is rotated CW, the
pistons moveout of the cylinders
+90¡
After 90¡ rotation the pistons are
alinged with the body
Left
screw
