Samson 3374 Mounting And Operation Instructions page 29

Actuators without resistance transmitters
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Move the actuator stem to the end position
depending on the fail-safe action "actua-
tor stem extends" or "actuator stem re-
tracts" (see the 'Operation' section).
3. Unscrew fastening screws. Slide the actu-
ator board (12) from its guiding to the
right. Slightly lift the board and continue
pushing it further towards the cable en-
try.
4. Clip the spindle gear (2) onto the sleeve
(13). Make sure the side latch is properly
engaged in the groove of the sleeve.
5. Slide the intermediate gear (1) onto the
spindle 1 (11.1), mount the serrated ring
(3) and push it down as far as it will go.
6. Slide the spacer (8) onto the spindle
(11.2).
7. Place the tension spring (4) on to the cor-
responding spindle, ensuring that the
long wire of the tension spring rests on
the spacer (8) and on the intermediate
gear (1).
8. Place both ready-assembled contact
cams (19) with the cog first onto the cam
holder (20).
9. Slide adjustment gears (18) onto their
spindles and fasten with one screw each.
Check whether the adjustment gears can
be turned easily. If not, slightly loosen its
screw again.
10. Turn both contact cams (19) on the cam
holder (20) as illustrated in Fig. 5-13
EB 8331-3 EN
corresponding with the position of the
actuator stem.
11. Slide the cam holder (20) with both con-
tact cams (19) onto the spindle 2 (11.2)
corresponding with the position of the
actuator stem as illustrated in Fig. 5-14.
Make sure that the outermost cog of the
cam support (20) engages in the gear-
wheel of the intermediate gear (1). In
addition, the adjustment gears (18) must
engage properly in the corresponding
gears of the contact cams (19).
12. Secure the cam holder (20) and interme-
diate gear (1) with the serrated ring (3);
push down the serrated ring as far as it
will go.
13. Position the terminal board (17) at the
base of the support at a 45° angle (ap-
prox.) with the switches pointing towards
the gears. Swivel the upper end of the
terminal board towards the gears until
the board is in a vertical position and
properly engaged in the support.
14. Slide the actuator board (12) back into
its guiding. Make sure that the gears are
properly engaged. Fasten the board us-
ing screws.
15. Adjust limit contacts as described in the
'Start-up' section.
16. Replace cover. Briefly turn the fastening
screws counterclockwise with a screw-
driver to center them. Then fasten down
the cover by tightening the screws.
Installation
5-9