TB-9-2320-280-35-14
TECHNICAL BULLETIN
INSTALLATION INSTRUCTIONS FOR SINGLE CHANNEL GROUND AND AIRBORNE RADIO SYSTEM (SINCGARS) AN/VRC-88F, AN/VRC-89F, AN/VRC-90F, AN/VRC-91F, AN/VRC-92F
SEPTEMBER 2006
TB-9-2320-280-35-14 - Page 118 of 148
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TB 9-2320-280-35-14
34-3.
Route speaker cables (2) and (3) and SINCGARS antenna cable (8) down B-pillar (5) to
B-beam (16). Secure cables (2), (3), and (8) to B-beam (5) with three loop clamps (19) and existing
screws (18).
34-4.
Secure speaker power cable (3) to B-beam (16) with loop clamp (11), existing footman loop (10), and
existing screw (9). Route speaker power cable (3) between B-beam (16) and seat (17) to terminal
boards.
34-5.
Secure speaker cable (2) and SINCGARS antenna cable (8) to cab enclosure panel (13) with three
loop clamps (12) and existing screws (14).
34-6.
Route speaker cable (2) through tunnel (15).
34-7.
Route speaker cable (2) to R/T mount (34).
34-8.
Locate, mark, and drill three 0.147-in. holes (23) in left rear wheelhouse (20).
34-9.
Locate, mark, and drill one 1.875-in. hole (30) in fixed rear door (29).
34-10.
Locate, mark, and drill three 0.219-in holes (24) on rear inside lip of left rear seat back support (25).
34-11.
Route coupler PA cable (36) along wheelhouse (20) and through hole (30) in fixed rear door (29).
34-12.
Route coupler PA cable (36) back through hole (30) to R/T mount (34).
34-13.
Route power cable (35) and KDU cable (33) with existing speaker R/T cable from R/T mount (34),
down wheelhouse (20), through hole (30), and into seatwell (28).
34-14.
Coil excess cable in seatwell (28).
NOTE
Cut split in grommet to fit cables.
34-15.
Position grommet (31) over cables.
34-16.
Install grommet (31) in hole (30).
34-17.
Route KDU cable (33), speaker cable (2), and power cable (35) along top of wheelhouse (20), down
wheelhouse (20) into seatwell (28), along tunnel (15), and through cab enclosure panel (13).
34-18.
Secure all cables to left rear wheelhouse (20) with three clamps (22) and (32) and self-tapping
screws (21).
34-19.
Route all cables under fixed rear door (29) and along perimeter of left rear seat back support (25),
and secure with three loop clamps (26), self-tapping screws (21), and plain-assembled nuts (27).
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