Servomech
®
06/14
3. INSTRUCTIONS FOR DISASSEMBLY AND REASSEMBLY
3.0. BEFORE YOU START
The power supply must be off
BEFORE beginning any disassembly or reassembly operation!
For disassembly, substitution of actuator parts and the corresponding reassembly you will need
the following:
specialized staff,
appropriate equipment,
basic knowledge of actuator construction,
correct procedure must be followed,
current national/regional health and safety regulations must also be observed.
In cases of uncertainty, please contact SERVOMECH or its authorised distributors’ techical
services.
The following descriptions refer to the numeric position of parts, as indicated on the corresponding
drawings (find them in APPENDIX).
3.1. DISASSEMBLY OF STROKE LIMIT DEVICE
A) ELECTRIC STROKE LIMIT DEVICE
3.1.1. Take off the seeger-ring (it. 17, SPARE PARTS LIST OF ELECTRIC SLD).
3.1.2. Unscrew screws and take them off together with their washers (it. 14 e 12, SPARE PARTS
LIST OF ELECTRIC SLD).
3.1.3. Take off axially the device from the push rod side.
B) MAGNETIC STROKE LIMIT DEVICE
3.1.1. Unloose the fixing screws of the reed fastening clamps.
3.1.2. Take off the reeds.
3.2. ACTUATING PART DISASSEMBLY
A) ACME SCREW ACTUATORS (Series ATL)
3.2.1. Warm up the end part of the push rod (it. 14) near the threaded end (it. 20) to loosen the
threadseal - threadlock; fix the push rod in order to prevent its rotation and unscrew anti-
clockwise the threaded end.
3.2.2. Warm up the housing (pos. 1) near the external tube (it. 13 or 86) in order to loosen the
threadlock - threadseal; take off the grub (it. 89) and take off the threaded insert (it. 6)
together with the external tube, unscrewing it anti-clockwise; take off the threaded insert
from the external tube, unscrewing it anti-clockwise.
3.3.3. Screw completely the push rod clockwise, and take off the seeger-ring (it. 35).
3.2.4. Unscrew manually the push rod (it. 14) from the screw (it. 15 or 74), together with bronze nut
(it. 5, 75, 76 or 84) and guide bush (it. 24). Take out the guide bush from the push rod.
DISPOSE CAREFULLY OF THE LUBRICANT!
3.2.5. If necessary, warm up the end part of the push rod near the nut, and then unscrew anti-
clockwise the nut.
