Specifications

Chapter 2 - Installation
42S315F 2-10
2.4.6.1 Installation of Trusses and Intercostals
Refer to drawing 517577C, 9-Meter Reflector Assembly, for the following
procedure.
1. Remove hub assembly (item 31, drawing 517577) from packaging and
place in upright position on stable wooden blocks or timbers. Raise
the hub assembly at least 8 inches above the ground for working
clearance. (Refer to drawing 517055 for hub assembly information.)
CAUTION
When assembling the reflector on the ground, the trusses
should be installed by alternating from one side of the
reflector to the other. This will prevent an unbalanced
load that could cause the assembly to tip over.
2. Locate the jack mount ear on hub (item 3 drawing 517055 sheet 1,
zone D-1).
3. Attach strut (item 17 drawing 517577 sheet 4, zone B-6) at first
position clockwise from jack mount ear. Secure strut with one bolt
(item 25), two washers (item 27), and one nut (item 26). Secure
hardware finger tight.
4. Attach truss (item 23 drawing 517577 sheet 4, zone C-4) to hub using
one bolt (25), two washers (27), and one nut (26) and to strut using
four bolts (item 28), eight washers (item 30), and four nuts (item 29).
Secure hardware finger tight.
5. Attach next clockwise strut and truss assemblies as described in steps
3 and 4.
6. Install top inner intercostal (item 18 drawing 517557 sheet 4, zone B-6)
between two truss assemblies using two bolts (item 28), four washers
(item 30), and two nuts (item 29). Secure hardware finger tight.
7. Install bottom inner middle intercostal (item 19 drawing 517557 sheet
4, zone B-6) between truss strut assemblies using two bolts (item 28),
four washers (item 30), and two bolts (item 29). Secure hardware
finger tight.
8. Install top outer intercostal (item 20 drawing 517577 sheet 4, zone B-6)
between two truss assemblies using two bolts (item 28), four washers
(item 30), and two nuts (item 29). Secure hardware finger tight.
9. Attach next clockwise strut and truss assemblies as described in steps
3 and 4. Then install intercostals as described in steps 6 through 8.