7
10/12 Rev. E
STEP 2 - WALL/COLUMN MOUNTED SWING ARM INSTALLATION
2.1
Determine position of
upper-formed
channel bracket on support structure. Drill
bolt holes (see
chart 1A
and
diagram 1A
, page 4, for bolt diameter and bolt to
support structure.
2.2
Determine position of lower formed channel bracket by measuring distance
between bracket centers; clamp bracket to support structure. Align brackets by
dropping plumb bob (by others) through pivot holes and making sure string is
centered in pivot holes (
diagram 2A
). Shim, if necessary, between mounting
surface and formed channel brackets (shims by others).
2.3
Drill bolt holes for
lower
bracket (see
chart 1A
and
diagram 1A
, page 4,
for bolt diameter) and bolt to support structure. Do not torque bolts until
Swing Arm has been checked for drift (Step 2.5).
2.4
Attach Swing Arm assembly to formed channel using hardware provided (
diagram 2B
). Be sure that thrust
washers are in position. Tighten nuts on pivot bolt until lockwashers are compressed, being sure boom
freely rotates.
2.5
Carefully swing arm through entire travel to ensure boom is clear of obstructions and does not drift.
If Swing Arm drifts
, support structure may be inadequate and/or shims may be required between mounting
surface and channel brackets (refer to
Step 2.2
for pivot mounting assembly alignment).
2.6
Torque mounting bolts (grade 5 or better, by others) to manufacturer’s specifications.
2.7
Proceed to Step 5 on page 10.
TIP:
Upper and lower formed channel (brackets) are identical unless a rotation stop is welded to the bracket. In
this case, the rotation stop bracket is the upper bracket (refer to Step 10, page 16).
STOP!
Do not proceed if your support structure does not meet the loading requirements determined in Step 1.4.
Diagram 2A.
Plumbing
formed channel brackets.
Diagram 2B.
Attaching Swing Arm assembly to formed channel.
