2
68P81124E57-A
June, 2000
Mobile Gain Antennas
Installation
2.
Drill the second 3/4-inch hole if required. Use
extreme caution, though, to prevent punctur-
ing the head lining.
3.
For proper seating of the mounting base and
locking nut, remove any burrs and/or foreign
matter from above and below the (top) 3/4-
inch mounting hole. This should be done for
at least 1/8-inch out from the hole edge. For
double roof construction vehicles (without
dome light), clear the second (or bottom) 3/4-
inch hole of any burrs also.
4.
Determine the routing of the cable from the
antenna mounting base to the radio set; then
remove the molding and trim necessary to
facilitate pulling the cable through.
NOTE
To ensure ease of assembly, thread the
locking nut on the end of the mounting
base a couple of times before installing.
This removes any burrs that may be
present.
NOTE
Refer to Figure 2. Be sure to apply a gen-
erous amount of silicone grease (sup-
plied) to the inner and outer threads of
the locking nut. In addition, be sure there
is some silicone grease applied to the
rubber "O" ring washer and the groove in
the locking nut in which it
is seated.
5.
Refer to Figure 3. Insert the end of the coaxial
cable into the mounting hole as shown; then
route the cable between the roof and headlin-
ing to the radio set.
NOTE
If difficulty is experienced with cable
routing, use an electrician's fishtape to
perform Step 5.
6.
Refer to Figure 4. Insert the mounting base
into the mounting hole as shown, tilted
slightly. Be sure that all of the cable has been
pulled through to the radio set. The threaded
portion of the mounting base will not fall
through the mounting hole.
IMPORTANT
In double roof vehicles, which have no
dome light, DO NOT attempt to secure
the base mount to both roof layers.
Secure it to the top, outer roof layer only.
7.
Refer to Figure 5. While holding the mounting
base down, thread the locking nut onto it.
When the nut is well onto the mounting base,
pull up on the entire assembly as shown in
Figure 6. Make sure the mounting base is cen-
tered in the hole, and seated properly with
both shoulders inside the mounting hole. Use
a 15/16-inch open-end wrench to tighten the
locking nut until it bottoms firmly against the
roof top.
IMPORTANT
Refer to Figure 11. If the mounting base
should slip or rotate for any reason while
tightening, insert the tips of a long-nose
pliers or a spanner wrench into the two
holes on top of the mounting base. Apply
enough force to prevent slippage until
the locking nut is tight. The locking nut
must come in contact with the vehicle
roof to ensure the proper antenna radia-
tion pattern. This can only be accom-
plished when the rubber "O" ring washer
is fully compressed.
Figure 2.
Parts Identification
Figure 3.
Figure 4.
Inserting the Mount Base
