Andrew 3.7-Meter Earth Station Antenna manual Step Elevation/Azimuth Strut Assembly

Step 2

Elevation/Azimuth

Strut Assembly

Step 3

Attach the 104319 front frame to the left side frame as shown in Figure 3-29c. Attach the 104325 braces to the left side by means of the U-bolts. Attach the right side frame and braces to the front frame and the right side frame to the left side frame, also shown. For all of these joints, use 100532-21 M16x40 long bolts, 100526-51 nuts and 100522- 51 lockwashers. When assembly is in place, tighten to 95 N-m. (70 lbs-ft).

104321

Right Side Frame

104325

Brace

M16

M16 Hex Bolt

Nut

104319

Front Frame

M16

Lockwasher

Figure 3-29c: Front Frame Attachment

Attach 104638 U-bracket to one end of each 301899 support pipe using 100537-87 M20 X 100 hex bolt, 100526-57 M20 hex nut and 100522-57 lockwasher. Attach 301900 strut bracket to 49258 strut support using 45980-1 .625-11 x 2" long bolt and nut assembly. Note: Long bolt and nut assembly should not protrude inside diameter of 49258 strut support. Assemble strut bracket/strut support assembly to support pipe by sliding over strut with welded tab facing 104638 U-bracket. Snug the strut support in place using 9953-15 .50- 13 x 1.5" long square head screws in three places. See Figure 3-29d. Note: For eleva- tions above 75° reverse the strut support so the welded tab faces away from U-bracket.

104638

U-Bracket

			301899-2
M20 x 100
				Support Pipe
Bolt, Lockwasher
and Nut
						1/2 x 1-1/2”
		301900
					Square Head Set Screw
		Strut Bracket
			49258
					Strut Support
		5/8 x 2”
	Bolt and Nut Assembly

3/4 x 3”

Bolt, Flatwasher,

Lockwasher and Nut

Figure 3-29d: Elevation/Azimuth Strut Assembly

39 Installation Procedures