User's Manual

Installation Manual GLS 400 Aluminum Roof Trailer 7
Location of the MT on the Trailer Roof
The recommended mounting location on the trailer roof is approximately 3ft.
back from the front of the trailer, and about 10 inches in from the left road-
side rail. This location is intended to minimize the potential for damage from
low hanging tree branches and to maximize the Mobile Terminal’s view of the
sky when the trailer is backed into a dock. The MT must not be co-located or
operating in conjunction with any other antenna or transmitter.
Installing the MT, Mounting Brackets, and Safety Tether
1. Begin by installing the MT to the Aluminum Roof Mounting Brackets (XTB).
Align the XTB mounting studs and insert the XTB into the GLS 400
mounting holes from the bottom. Fasten the XTB to the GLS 400 with 2
flat washers (Item #1) and 2 lock nuts (Item #2). Repeat on the opposite
end with the second XTB.
2. Install the Safety Tether (STC) to the MT using a 8-32 x 3/8” stainless
steel screw (Item #3) and a flat washer (Item #4). Position the tether as
shown and tighten the fastener.
3. Locate two rivets in the roof; about 3 feet back from the front of the
trailer, along the left road-side roof rail. Mark and drill a 3/16” hole
between the two rivets to create a mounting point for the Safety Tether.
Install the 10-24 x 1” long screw through the tab in the tether and fasten
to the trailer with the #10 flat washer and 10-24 lock nut. Orient the
tether mounting tab as shown in the photo and tighten.