Andrew 7.3-Meter ESA Installation, Operation And Maintenance Manual page 31

Step 3
Align tabs on 77639 feed rotating tube assembly with corresponding tabs on drum
assembly. Attach rotating tube to center of drum assembly using 3/8 x 1-3/4 in (44 mm)
bolts, lockwashers and nuts as shown in Figure 38. Do not tighten.
Figure 38
Installation Procedures
31