Controlled Products Systems Group 107725 - Manual (Page 14)

Page 14
June, 2004
750 Operator And
455 D Control Panel Installation Manual
With the hydraulic system disengaged, open the gate
leaf by hand to a half-opened position. Re-engage the
hydraulic system.
If you have a CBAC model of the 750 Operator (with
hydraulic locking in the fully opened and fully closed
positions), then first try to move the gate leaf. If you are
unable to make the gate leaf move, then you do not
need to bleed the hydraulic system.
If you do need to bleed the hydraulic system, then next
open the bleed screw that is on the same side of the
drive unit as you are. Open the screw less than a full
turn. Next, pull the gate leaf toward you until just oil
(and no bubbles) comes out of the drive unit. Then
close the bleed screw.
Next, release the air from the other end of the drive
unit in the same manner.
Finally, test the automatic operation of the gate. If the
gate does not operate smoothly, then repeat the
bleeding process again.
I
NSTALLING AN
E
XTENSION
A
RM
Some gate installations do not meet the geometrical
constraints shown in Figure 2. In those situations, the
750 Extension Arm option can be used along with the
750 drive unit, power unit, and control panel to install
an unobtrusive gate operator.
Using the 750 Extension Arm means that you do not
have to permanently remove any leaf hinges, the gate
leaf does not need to form a 90-deg angle on the
bottom corner nearest the gate post, and the relative
location of the rotation axis is not so restricted.
The geometrical constraint for using the 750
Extension Arm is that the center of the splined shaft
on the drive unit must be within 6 in. (15.25 cm) of
the axis of rotation of the gate leaf.
WARNING! The farther away the splined shaft is
from the gate's axis of rotation, the greater the
risk of danger from pinch points.
Install the drive unit so that the splined shaft is as
near as possible to the gate's rotation axis and is
directly beneath the center of the fully closed gate
leaf.
You need to position the extension collar (see
Figures 12 and 13) so that it smoothly slides within
the extension U from the fully closed to the fully
opened position. Note that the position of the
extension collar is affected by the overlap of the
extension bar and extension U.
Attach the 750 extension collar to the bottom of the
gate leaf with a 7/16 in. (1.1 cm) bolt.
Weld together the extension bar and extension U
according to Figure 13.
Caution: Do not weld anything to or on the
inside of the sleeve of the splined shaft.
Next, weld the outside of the sleeve for the splined
shaft solidly to the inside of the hole in the end of the
extension bar.
Follow the rest of the instructions for installing the
750 Operator. With an extension arm, you need not
worry about installing a gate leaf shoe nor about
installing the gate leaf in the shoe. Instead, you will
install one end of the welded extension arm over the
splined shaft and the other end around the extension
collar.
In addition, you will need to provide a washer
beneath the extension collar to keep the extension U
from falling off the collar. You also need to shield any
pinch points around the extension arm.