ETS-Lindgren 2175 Antenna Tower - Manual (Page 20)

20 | Assembly and Installation
Outdoor applications require guying to stabilize the mast against wind. For
outdoor applications, engage the lock on the swivel casters at this time.
Figure 7: Boom Placement
10. Pull the coiled hose out of the carrier and insert the primary boom as pictured into the
carrier. Note the position of the knobs on the boom gear and on the boom bearings.
The gear back-up roller should be directly behind the rack gear and the cylinder
should be in a fully compressed state. Incorrect horizontal and vertical polarization
angles will result if the cylinder is not fully compressed. Once the primary boom is
locked in place, install the offset boom and the coaxial cable strain relief.