Duff-Norton SK2463-22 (Modular Actuator Acme Screw) - Manual (Page 6)

6
Section V
Disassembly and Assembly
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 adaptor (29), and remove the limit switch box
(D) from the limit switch adapter.
7. Remove the two half dog point sets 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 limit
switch adapter from the shell.
8. Remove the two set screws (10) from the shell (9),
and unscrew the shell cap (19) from the shell.
9. Remove the shell cap, 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 will be driven out by
the worm. The other worm bearing (2) should re-
main 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. Clamp the lifting screw (17) in a vise, using soft jaws
to prevent damage to the screw.
16. Remove the lock nut (12), and remove the gear (14),
key (18), and spacer (15) from the lifting screw (17).
17. Remove the shell cap (19) and lifting nut (20) from
the lifting screw (17).
18. Remove the stop pin (16) from the lifting screw (17)
if necessary.
19. Remove the two load bearing cones (13) from the
gear (14).
Disassembly of the actuator is now complete.
5-5. Assembly - Rotating Screw
Actuators
(Models M-2462 and M-2463)
Assemble the Duff-Norton® Rotating Screw Modular Ac-
tuator as follows, referring to Figure 6-1 on page 11. Read
the instructions thoroughly before assembling the actua-
tor.
5-1. Lubricant
When rebuilding this actuator, use only Albida LC EP#2
grease from Shell Oil Company.
5-2. Required Tools
A bearing puller and press, a soft jaw table clamp, and
common hand tools are required for proper disassembly
and assembly of the actuator.
5-3. General Procedures
Duff-Norton recommends following these procedures dur-
ing disassembly and assembly of the actuator:
1. Tag critical parts to facilitate reassembly.
2. Mark mating surfaces to ensure proper meshing.
3. Clean and lubricate parts as required.
4. Replace all seals at time of rebuild.
5. Replace any screws, washers, and other small com-
mon parts that are damaged in any way.
5-4. Disassembly - Rotating Screw
Actuators
(Models M-2462 and M-2463)
Disassemble the Duff-Norton® Rotating Screw Modular
Actuator as follows, referring to Figure 6-1 on page 11.
Read the instructions thoroughly before disassembling the
actuator.
NOTE
For disassembly procedures for Translating
Tube actuators, see Paragraph 5-6.
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 (18) from
the worm shaft (4).