Red Dot Corporation P.O. Box 88790, Seattle, WA 98138 (425) 251-6897 Fax (425) 251-3934
RD-3-9821-0 REV -
For Reference Only. Subject to change without notice
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4. Cut the rectangular inlet and outlet holes into the roof where marked (stay inside the lines). Then remove the
headliner and drill the 1/2" dia. mounting holes. Remove burrs and sharp edges. NOTE: The rectangular
holes should go through the headliner, the mounting holes should not go through the headliner. If the
headliner is difficult to remove (or if the cab has no headliner), drill the 1/2" dia. mounting holes through the
headliner and use cap plug washers and cap plugs (supplied with kit) in conjunction with the M l0 mounting
bolts as shown in figure 2.
5. Clean the outside roof area around the cut-out and mounting holes using a mild solvent.
6. Apply a bead of sealant around upper surface of roof cut-out and mounting holes. Completely fill bolt holes
with silicone to ensure proper sealing. Also, place two rubber tapered spacers on each of the mounting holes
and rotate the spacers relative to one another to level the unit on the roof (figure 2).