IM-P361-02-EN-ISS1
CTLS
19
Fig. 9 TN2000R
8
6
6
18
17
23
24
5
20
7
A
26
4.3 Replacing the 'O' and 'X' rings (SR and DR actuators)
Note:
Remove the actuator from the valve as described in Section 4.1
Note:
There are 5 long securing nuts that must be removed last to ensure that the spring tension is removed.
-
Loosen and remove the connector (
20
), see Figure 9.
-
Depending on the actuator size loosen and remove the 3 or 4 short threaded bars (
7
).
-
Evenly loosen and remove the remaining long securing nuts (
23
), see note above.
-
Remove the upper cylinder cap (
4
).
-
Remove the piston assembly (
A
part numbers:
2
,
19
,
24
,
26
,
31
and
32
).
-
Remove the cylinder (
5
).
-
Replace the 'O' and 'X' rings (
17
,
6
,
24
and
26
).
To rebuild the actuator follow the next procedure:
Caution: POLYLUB GLY 801 must be used to ensure smooth operation of the piston.
-
Apply grease to the internal of the cylinder (
5
) and the bearings (
18
) (approximately 50 mm) to be in contact
with the piston).
-
Lower the cylinder (
5
) onto the lower cylinder.
-
Lower the piston assembly into the actuator (
2
,
19
,
24
,
26
,
31
and
32
), taking care not to damage the
bearing (
18
) and seal (
17
).
-
R e p l a c e t h e u p p e r
cylinder (
4
).
-
D e p e n d i n g o n t h e
actuator size refit the 3 or
4 long threaded bars (
23
)
evenly to pull the piston
a s s e m b l y i n t o t h e
cylinder (
5
) and the
cylinder (
5
) onto the
cylinder end caps (
1
and
4
). Then tighten to 30 Nm
(22.1 lbf ft).
-
R e f i t a l l r e m a i n i n g
securing screws and nuts
(
7
,
8
and
23
) and tighten
to 30 Nm (22.1 lbf ft).
-
Re-attach the actuator to
the valve as described in
Section 3.2.
1
4