Joyce DIA201 - ACME 1 diameter, .25" pitch, .50 lead"" - Manual (Page 6)

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13. The worm gear nut, key, and retaining ring (3, 14, and 10) will be attached to the end of the
assembly.
14. Remove the retaining ring (10) from the end of the jackscrew (11).
15. Disassemble the nut and key (3, 14) from the jackscrew.
16. The jackscrew (11), translating tube (13), and dowel pin (25) are considered an assembly. If
any of these parts are worn and/or damaged, you must replace them all. It is not possible to
disassemble them without damaging them.
17. The lower thrust bearing (2) can now be pulled out of the sleeve.
2-4 Disassembly of Traveling Nut Actuator
1. Use the appropriate disassembly procedure. If the lifting nut is outside the actuator on the
screw, it is a traveling nut integrated actuator; this is also called a “rotating screw” actuator. If
the nut is not positioned outside the actuator sleeve, it is a translating tube integrated actuator.
2. Handle all machined parts with care and maintain an “order of disassembly” to aid in re-
assembly.
3. The motor is optional. It is not user serviceable.
4. Disconnect power from the integrated actuator before proceeding.
5. To remove the motor, secure the integrated actuator in a work holding device such as a bench
vise. Do not clamp onto the jackscrew (11).
6. Remove the four hex head screws and washers (20, 21) that attach the motor to the flanged
sleeve (1). Remove the motor.
7. Remove the coupling half (17) and key (18) from the worm shaft.
8. Remove the seal (9) and retaining ring (8).
9. Use a tool to tap on the flange end of the worm shaft (6). This will loosen and unseat the worm
shaft bearing (7) and permit disassembly.
10. Loosen the two set screws (5) and unthread the sleeve cap (4). The seal (15) and upper thrust
bearing (2) may remain inside the sleeve cap when it is removed.
11. Disassemble the jackscrew (11) from the sleeve (1) by firmly pulling upward, away from the
sleeve (1).
12. The worm gear nut (3), key (13), and retaining ring (10) will be attached to the end of the
assembly.
13. Remove the retaining ring (10) from the end of the jackscrew (11).
14. Disassemble the worm gear nut and key (3, 13) from the jackscrew.
15. Unscrew the travelling nut (12) from the jackscrew (11) and remove.
16. The lower thrust bearing (2) can now be pulled out of the sleeve.
2-5 Inspection of Components
1. Before any inspection, it will be necessary to completely clean all parts of the integrated
actuator. Use caution with any machined or fragile part.
2. Inspect the cleaned integrated actuator sleeve (1), jack screw (11), and translating tube
assembly (11, 12, 13, 22, 25) or the rotating screw and traveling nut (11, 12). Check for any
signs of stress or fracture, especially around mounting holes and clevis hole.
3. Inspect the condition of all the gears and components that have been disassembled.
4. Check the thrust bearings for any signs of brinelling, abrasive wear or spalling. Test for
smooth, quiet operation of bearings.
5. Replace seals on translating tube model (9, 15, 20). Replace seals on the traveling nut model
(9, 15).
6. Inspect O-Ring (19 or 16) and keys (14, 24 or 13, 18) for signs of damage or deformity.
7. Inspect lifting screw (11) for straightness and wear. This is part of an assembly on a translating
tube actuator.
8. Inspect the clevis end of the translating tube for damage or deformity.
9. Inspect the traveling nut (12). Replace it if wear is evident.