Andrew manual ES45T-T-1Back Structure Step, ES45T-TReflector Assembly, Installation Procedures

ES45T-T Reflector Assembly

ES45T-T-1 Back Structure

Step 1

The back structure assembly attached to the rear of the reflector. The back structure provides stability for the reflector and maintains the parabolic accuracy of the dish.

Before assembling the back structure, verify that the appropriate parts are present. The following steps provide the procedure for the back structure assembly.

CAUTION: Reflector must remain on level supports positioned under center edge of each reflector segment with diameter setting bands in place during assembly of back structure. Once back structure is attached and all bolts tightened, reflector will be held in its assembled shape. If back structure is added with reflector in distorted shape, back structure will hold reflector in that shape. If standing or walking on reflector becomes necessary, concentrate major portion of body weight towards center of reflector panel.

Refer to back structure Figure 66 for positioning and orientation details.

•Apply stick wax (P/N 200852) to A-325 bolt threads before installation to reduce fric- tion. (see page 12)

Note: Do not attempt to tighten A-325 hardware prior to tensioning sequence in assem- bly procedure.

Figure 66

55 Installation Procedures