S&C Instruction Sheet 761-505
9
Installation
Mounting to Wood
NOTICE
When mounting to a wood structure, a spring-type
washer must be used between the square washer
and the nut to maintain fastener tightness in the event
of wood shrinkage. See Figure 2. Drawings for stan-
dard mounting arrangements show only the minimum
or suggested locating dimensions for the outboard-
bearing assembly, vertical operating-pipe guide
bearings, and the operating-handle assembly. Spe-
cific locations are to be determined either at the job
site or by the user's engineering department.
Operating Pipe Preparation
Operating pipes can be cut to length (if not precut at the
factory) before transporting the switch to the job site.
Cutting dimensions are shown on the erection drawing.
Uncrating the Switch
STEP 1.
Remove the switch poles and bell-crank base(s)
or bracket(s) from their crates and arrange them
on the ground in the same order in which they
will be mounted on the pole or structure. Protect
the bearings from contami nation by dirt, mud,
oil, etc. If necessary, use blocks to keep the
bearings clear of the ground.
Attaching Couplings to Switch Poles
STEP 2.
Attach pipe couplings to the toggle mecha nism
of each switch pole. Each toggle mecha nism
includes a ¼-inch (6-mm) and a
⅜
-inch (10-mm)
spacer. Use one or both spacers, depending on
the number and type of coupling(s). See Figure 3
as well as the instruction tag attached to the
toggle mechanism.
Be sure to attach the
adjustable
pipe cou-
plings to the correct switch pole. See the erec tion
drawing (ED).
If specified on the erection drawing (ED),
attach a universal pipe coupling to the switch
pole nearest the bell-crank.
Spring-type
washer
Adjustable
pipe couplings
Figure 2. Applying the spring washer.
Figure 3. Attaching the pipe couplings to the switch toggle
mechanism.
