Duff-Norton SK2463-22 (Modular Actuator Acme Screw) - Manual (Page 8)

8
5-6. Disassembly - Translating Tube
Actuators
(Models M-2464 and M-2465)
Disassemble the Duff-Norton® Translating Tube Modular
Actuator as follows, referring to Figure 6-2 on page 12.
Read the instructions thoroughly before disassembling the
actuator.
NOTE
For disassembly procedures for the Rotating
Screw actuators, see Paragraph 5-4.
NOTE
Disassembly should be undertaken on a
clean cloth.
1. Remove the four cap screws (B) with lock washers
(F) that attach the motor (A) to the shell (9) flange,
and remove the motor from the shell. Half the flex-
ible coupling (5a) will come with the motor shaft,
and the other half (5a) will remain on the worm shaft
(4). The flexible spider (5b) may stay with either
half of the coupling.
2. Remove the set screw (5c) from the motor half of
the coupling (5a), and remove the coupling half and
the key (E) from the motor shaft.
3. Remove the pipe plug (7) and the grease fitting (8)
from the shell (9).
4. Remove the set screw (5c) from the worm half of
the coupling (5a) by inserting the set screw wrench
through the pipe plug hole.
5. Remove the coupling half (5a) and the key (6) from
the worm shaft (4).
When disassembling an actuator equipped with limit
switches, follow steps 6 and 7 below. If the actuator is not
equipped with limit switches, proceed directly to step 8.
6. Remove the two socket head cap screws (28) and
the one long hex head cap screw (26) from the limit
switch adapter (29), and remove the limit switch box
(D) from the limit switch adapter.
7. Remove the two half dog point set screws (30) from
the shell (9) and remove the limit switch adapter
(29) from the shell (see NOTE below).
NOTE
It may be necessary to use heat to overcome
the adhesive in order to remove the adapter
from the shell.
8. Remove the two set screws (10) from the shell (9),
and remove the outer tube (24) by first unscrewing
it from the shell and then sliding it off over the trans-
lating tube.
9. Remove the translating tube, lifting screw, bearing,
and gear assembly from the shell (9).
10. Remove the retaining ring (1) from the shell (9).
11. Remove the worm (4) by pressing on the motor end
of the worm shaft. The worm bearing (2) next to
the retaining ring (1) groove in the shell (9) will be
driven out by the worm. The other worm bearing
(2) should remain in the shell until the load bearing
cup (13) has been removed.
12. Press the worm bearing (2) off the worm (4).
13. Remove the load bearing cup (13) out of the shell
(9).
14. Remove the remaining worm bearing (2) from the
shell (9).
15. Remove the remaining load bearing cup (13) from
the outer tube (24).
16. Remove the wiper scraper seal (22) from the outer
tube (24), and if necessary press the guide bush-
ing (23) out of the outer tube.
17. Clamp the lifting screw (17) in a vise, using soft jaws
to prevent damage to the screw.
18. Remove the lock nut (12), and remove the gear (14),
key (18), and spacer (15) from the lifting screw (17).
19. Remove the two load bearing cones (13) from the
gear (14).
20. Screw the lifting screw (17) into the translating tube
until the screw bottoms out and cannot rotate far-
ther, or until the screw thread becomes disengaged
from the lifting nut (19) thread.
21. (M2464) Drive the four pins (20) just far enough into
the lifting nut (19) to clear the translating tube wall;
then remove the translating tube from the nut.
(M2465) Remove the set screw (S7-94) from the
translating tube; then remove the lifting nut from the
translating tube.
22. Remove the lifting screw (17) from the lifting nut
(19).
23. Remove the four pins (20) by pressing each one
the rest of the way through the lifting nut wall.
24. Remove the stop pin (16) from the lifting screw (17)
if necessary.
Disassembly of the actuator is now complete.
5-7. Assembly - Translating Tube
Actuators
(Models M-2464 and M-2465)
Assemble the Duff-Norton® Translating Tube Modular Ac-
tuator as follows, referring to Figure 6-2 on page 12. Read
the instructions thoroughly before assembling the actua-
tor.
NOTE
For assembly procedures for Rotating Screw
actuators, see Paragraph 5-5.
NOTE
Be sure all parts are clean and dry before
assembling the actuator.
1. Assemble a load bearing cup (13) into the shell (9).