TM 11-5840-281-35/1
tor body (7) onto directional coupler body until finger
from cover (28).
tight.
(10) Remove four screws (29), lockwashers (30),
(5) Apply antiseize compound in accordance with
flat washers (31), waveguide (32), and preformed
federal specification TT-A-580 ( ) to two setscrews (6).
packing (33).
Use setscrews (6) to secure connector body (7) to
(11) Remove eight screws (34), lockwashers
directional coupler body (18).
(35), and flat washers (36).
(6) Place clamp (4) around bottom portion of
(12) Remove receiver-transmitter frame (37)
connector body (7) and attach clamp (4) and cap chain
from base.
(5) using nut (1), screw (2), and lockwasher (3).
(13) Remove four screws (38), lockwashers (39),
(7) Refer directional coupler to higher category
fiat washers (40), and identification plate (41) from rotary
of maintenance to determine the db lows at 9.0, 9.3, 9.6
mounting base (42).
gHz.
b. Assembly. To assemble receiver-transmitter
group, proceed as follows:
(1) Install identification plate (41) on rotary
5-24.
Disassembly and Assembly of Receiver-
mounting base (42) using four screws (38), lockwashers
Transmitter Group
(39), and flat washers (40).
(2) Install receiver-transmitter frame (37) on
rotary mounting base (42) using eight screws (34),
a. Disassembly. To disassemble receiver-transmitter
lockwashers (35), and flat washers (36).
group, proceed as follows:
(3) Position preformed packing (33) on open
(1) Remove four screws (1), flat washers (2),
waveguide on receiver-transmitter and install waveguide
and two braces (3).
(32) using four screws (29), lockwasher (30), and flat
(2) Remove nut (4), screw (5), lockwasher (6),
washers (31).
and two flat washers (7), holding each angle bracket to
(4) Connect wire rope assembly (27) to cover
frame.
(28) with screw (26) and pin (25).
(3) Remove nut (8), screw (9), lockwasher (10),
(5) Install assembled covers (23) and preformed
and two flat washers (11) holding each angle bracket to
packing (24) on open waveguide using waveguide
mounting bracket.
couplings (22).
(4) Knock out four spring pins (12) in each angle
(6) Slide Receiver-Transmitter RT-818/ TPN-18
bracket and remove two angle brackets (18).
(21) into receiver-transmitter frame (37) and secure at
(5) Remove screw (14), lockwasher (15), and flat
bottom using four screws (18), lockwashers (19), and flat
washer (16) holding each mounting bracket, and remove
washers (20).
mounting bracket (17).
(7) Loosely attach two mounting brackets (17) to
(6) Remove four screws (18), lockwashers (19),
shock mounts on receiver-transmitter using screws (14),
and flat washers (20).
lockwashers (15), and flat washers (16).
(7) Slide Receiver-Transmitter RT-818/ TPN-18
(8) Loosely attach two angle brackets (13) to
(21) out of frame.
mounting bracket (17) using nuts (8), screws (9),
lockwashers (10), and flat washers (11).
NOTE
(9) Loosely attach angle brackets (i3) to
Refer to paragraphs 3-58 through 3-62 for
receiver-transmitter frame (37) using nuts (4), screws
removal procedures of Receiver-Transmitter
(5), lockwashers (6), and flat washers (7).
RT-818/TPN-18 components.
(10) Pin angle bracket (13) to mounting bracket
(17) and frame (37) using pins (12), then tighten all loose
(8) Release two waveguide couplings (22) and
hardware.
remove waveguide covers (23) and preformed packings
(11) Install brace (3) on frame (37) using screws
(24).
(1) and flat washers (2).
(9) On each waveguide cover, remove pin (25)
and screw (26), then separate wire rope assembly (27)
5-61
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