Joyce Electric Cylinders with Ball Screw - Manual (Page 5)

5
2-2 Repair Parts
Repair parts may be obtained by calling Joyce/Dayton Customer Service at (800) 523-5204, (937)
294-6261, (937) 297-7173 (facsimile) or your local sales representative. When ordering repair
parts, please supply the serial number (located on the nameplate).
The following parts are recommended for rebuild or spares. See Sections 3-1 and 3-2 and Parts
List in Section 3-3.
A. (2) Thrust Bearing
B. (1) Worm Gear Nut
C. (1) Worm
D. (2) Worm Shaft Bearing
E. (2) Worm Shaft Seal
F. (1) Translating Tube and Screw Assembly
G. (2) Bushings
H. (1) Wiper Seal
I.
(1) Motor (Direct Drive or ComDRIVE option)
J. (1) Gear reducer (ComDRIVE option)
K. (1) Motor mount (Direct Drive option)
2-3 Disassembly of Electric Cylinder
Before beginning to disassemble these units make sure the load has been removed and secured
according to best practice standards for safety..
Direct Drive option and ComDRIVE option
1. Motors supplied with Direct Drive and ComDRIVE units are not user serviceable.
2. Loosen the bolts attaching the motor to the jack or to the gear reducer and remove the motor.
3. The gear reducer on ComDRIVE units must also be removed before the electric cylinder can
be disassembled.
Limit Switch, Encoder, or Potentiometer option
4. Loosen the bolts holding the limit switch, encoder, or potentiometer and remove from their
mounting bracket.
5. Loosen the bolts attaching the mounting bracket to the electric cylinder and remove
Disassembly of ECB
6. Loosen the hex head screws on the worm bearing caps or remove the mounting adapters
described above.
7. Remove the worm bearings and remove the worm shaft through the end of the sleeve. This
may also be removed after the Translating Tube and Screw Assembly is removed later in the
process.
8. Extend the translating tube assembly a few inches. This positions the components to be more
easily disassembled.
9. Loosen the setscrews at the base of the protection tube.
10. Unthread the protection tube and pull it off over the end of the translating tube assembly.
11. Loosen the set screws that secure the sleeve cap. Unthread the sleeve cap and remove it.
12. This will allow the translating tube assembly along with several internal components to be
pulled up out of the sleeve.
13. Remove the retaining ring located at the base of this assembly and remove the key.
14. Remove any portion of the lower bearing that may be attached to the worm gear nut.
15. Unthread the worm gear nut from the lifting screw.
16. The upper thrust bearing can now be separated from the worm gear nut along with the seal.
17. Remove the grease from the cavity and inspect parts for damage or wear.
18. Assemble replacement components by carefully reversing the disassembly process.