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5. Use the circular drill bit
to drill a hole from the
roof.
6. If you do not have a
circular drill bit, draw a
hole of
∅
38 mm for the
roof duct and drill it out.
7. File the hole out.
8. Use a gimlet to make
holes.
If your vehicle has a
plastic roof, pre-drill
holes using a
∅
3,5 mm
drill bit.
9. Screw in the screws. Be
careful not to overtighten
screws.
10. Screw the knurled nut
from below.
11. Carefully screw on the
cone nut.
12. Push the sealing sleeve
until it sits. Be careful
not to push it too hard.
13. If necessary, deburr
the mast and put it into
place.
14. Push the automatic
clamp plate up and
insert the mast.
15. Tighten the screws.
HDM140: 20 cm
between the roof and
the mounting bracket
HDM141: 9 cm between
the roof and the moun-
ting bracket
16. Place the mast verti-
cally so that it is easy to
move it. If it is difficult to
move the mast, place an
underlay underneath or
sand it.
Summary of Contents for HDM 140
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