Chief Manufacturing Vibration Mount CMA-347 - Manual (Page 5)

Installation Instructions Model CMA-347
5
Set-Up
Set-up For 15 Pounds and Under
The mount is shipped pre-assembled for applications
under 15 pounds. If the total combined weight of the
projector, projector mount, and lower mounting pipe is
15lbs or below, proceed with mount installation.
(see MOUNT INSTALLATION on page 4)
For applications over 15 pounds, proceed to “Set-up For
Over 15 Pounds”.
If the mount has been previously set-up to accommodate
a weight of 15-35lbs, it needs to be reconfigured to work
properly with weights below 15lbs.
To set-up the mount for applications under 15lbs:
1. Un-install mount following the instructions outlined in
the Removal section of this document.
(see Mount Removal on page 7)
2. Loosen and remove 1/4-20 Nylock nut (110), 1/4"
fender washer (130), and stepped sorbothane
damper (40) located underneath mount arm and set
aside for reuse. (see figure 3)
3. Slide 1/4-20 x 4" tap bolt (120) upward, out of mount
top (10).
NOTE: Make cetrtain hardware group B (see figure 3)
and (see figure 4) stays in place when removing
1/4-20 x 4" tap bolt (120) and associated
hardware.
4. Remove hardware group A (see figure 3) keeping
1/4-20 x tap bolt (120) for reuse in 0-15lb
configuration.
5. Install 1/4" fender washers (130), sorbothane
dampers (50), and long medium gauge spring (80),
onto 1/4-20 x 4" tap bolt (120). (see figure 4)
6. Insert 1/4-20 x 4" tap bolt (120) with washers and
dampers through mount top (10), group B hardware
(see figure 6), and mount bottom (20). (see figure 4)
7. Install stepped sorbothane damper (40), fender
washer (130), and Nylock nut (110) onto 1/4-20 x 4"
tap bolt (120). (see figure 4)
8. Tighten until a slight preload is on the springs.
Repeat steps 2 through 8 for the remaining two hardware
sets.
Figure 3: Remove 35lb-15lb Application Hardware.
Figure 4: Install 0-15lb Application Hardware.
(90)
(40)
(10)
(20)
(120)
(130)
(100)
(100)
(110)
(60)
B
A
(40)
(10)
(20)
(120)
(130)
(110)
(130)
(50)
(130)
(80)
(50)
(130)
(50)
(130)
(70)
(130)
(50)
B
(130)