Page 6
Switch
Switch Crank
Offset Rod
Interphase
Rod
Vernier
Adjustment
Multi-Angle
Crank
Fig. 6 Multi-Angle Crank
Step 8—Adjust the Multi-Angle Crank
The crank is identified in Fig. 5 and is shown in
more detail in Fig. 6. This crank is supplied on the
operating pole unit connected to the offset bearing.
For all custom installations the angle between the
multi-angle crank and switch crank is set in the
factory when single pole assembled.
The multi-angle crank adjustment is located every
12 degrees which results in adjustments to within
6 degrees of the desired position.
In some adjustments, the multi-angle crank may be
in such a position as to interfere with the stop
projection on the switch crank. If this is the case,
then remove this projection. The other two poles
will regulate the blade travel on this unit.
Note: The multi-angle crank should be set so that
it forms an angle of approximately 45 degrees with
the offset link in either switch position, open or
closed.
Step 9—Install Vertical Operating Pipe
The vertical operating pipe (Fig. 5) is pre-
drilled at one end for a 5/8-inch diameter bolt.
To install the vertical operating pipe (VOP):
1.
Install the coupling on the VOP, then
fasten the VOP to the offset rotor bearing
shaft (or on the pole unit rotor bearing
shaft for direct-connected switches) using
the 5/8” coupling bolt supplied with the
unit.
2.
Install accessory items. Refer to the
drawings shipped with the unit for
instructions on installing accessory items
(auxiliary switches, mechanical interlocks,
position indicators, ground straps, etc.)
which mount on the vertical operating pipe.
Step 10—Install Pipe Splice and Guide Plate
A pipe splice and guide plate (Fig. 5) are
furnished for structures taller than 23 feet.
1.
Install the pipe splice.
2.
Mount the guide plate.
3.
Align the hole in the guide plate with the
normal position of the vertical pipe without
any binding and tighten the bolts on the
guide plate.
Step 11-Install Offset Rod
With the drive phase in the fully closed position,
install the offset rod from the offset bearing to the
multi-angle crank as follows:
a.
Attach the over head clevis and vernier clevis
b.
Set the pin to pin dimension.
c.
Lengthen the offset rod that is in compression
during opening, as much as possible, yet
allowing for the pin to be inserted.
d.
If the offset rod is in tension during opening,
shorten it as much as possible, yet allowing for
the pins to be inserted.
e.
To adjust the offset rod length, loosen the
locking nuts (Fig. 7, A) and rotate the turning
nut (Fig. 7, B) to lengthen or shorten the offset
pipe. Then tighten the locking nuts.
The vernier adjustment is for fine tune adjusting. If
major adjustment (more than 1”) is required, make
changes at the overhead clevis mounted on the
offset bearing.
A
B
A
Fig. 7 Vernier Adjustment
On Offset Rod
