TM 11-5840-281-35/1
(56) Attach terminal board TB9201 (99) to cover
(6)
Pull special cable assembly (13) from cover
plate (107) using two screws (96), lockwashers (97), and
(12).
flat washers (98).
(7) If cable or connector is to be replaced, unsolder
(57) Attach terminal board TB9202 (103) to cover
wires of cable (14) from connector (15).
plate (107) using two screws (100), lock- washers (101),
(8) Remove rubber grommet (16) from actuator
and flat washers (102).
cover (12).
(58) Assemble cable assembly (91), if necessary,
(9) Remove nut (17), screw (18), flat washer (19),
from terminals (92), bushing (93), connector (94), and
and clamp (20) from cover (12).
cable (95).
(10) Remove two nuts (21), screws (22), flat
(59) Attach cable assembly (91) to cover plate
washers (23), and rf filter (24) from cover (12).
(107) with bushing (93).
(11) Remove four screws (25) and dc motor (26).
(60)
Using schematic for elevation horn and
polarizer as reference (fig. 7-67), connect wires from
NOTE
cable assembly (91), dc motor (55), switches (65, 66, 67,
Refer to paragraph 5-21 for disassembly
and 68) to terminal boards (99 and 103).
procedures for dc motor (26).
(61) Position gasket (45) and cover (44) on cover
plate (107), and secure in place using three nuts (39),
(12)
Remove screw (27), screw (28), switch
three screws (40), seven screws (41), ten lockwashers
actuator (29), and retract limit switch (30).
(42), and ten flat washers (43).
(13) Remove screw (31) and cover plate (32).
(62) Attach wire rope assembly (4) to waveguide
(14)
Remove screw (33), screw (34), switch
coupling (1).
actuator (35), and extend limit switch (36).
(63) Attach wire rope assembly (4) to cover (5)
(15) Remove screw (37) and cover plate (38).
using screw (2) and pin (3).
(16) Loosen two set screws (39) on shaft coupling
(64) Position preformed packing (6) over open
(43).
ends of waveguide (10).
(17)
Remove variable resistor (42), nut (40),
(65) Attach waveguide couplings (1) to waveguide
lockwasher (41), and shaft coupling (43).
(10).
(18) Remove screw (44) and cam (45).
(66) Position covers (5) over open ends of wave-
(19) Remove four screws (46) and mounting
guide (10) and secure in place with waveguide couplings
bracket (47).
(1).
(20) Remove screw (48) and cam (49).
(67) Refer elevation horn and polarizer to higher
(21) Remove four screws (50) and cover (51).
category of maintenance for calibration and test.
(22) Carefully rock gearshaft (52) back and forth
until bearings (53) can be removed, then remove
5-12. Disassembly and Assembly of Antenna Servo
gearshaft (52) from tube-gearbox.
(23)
Remove two retaining rings (54) from
Actuator
gearshaft (52).
(24) If helical gear or shaft of gearshaft (52) is to be
replaced, remove pin (55), then slide helical gear (56) off
a. Disassembly. To disassemble the antenna servo
of shaft (57).
actuator, proceed as follows:
(25) Remove five screws (58) and cover (59).
(1) Remove screw (1), lockwasher (2), flat washer
(26) Remove retaining ring (60), spur gear (61),
(3), and rod end (4).
sleeve bearing (62), and fastener stud (63).
(2) Remove ten screws (5), lockwashers (6), flat
(27) Remove retaining ring (64), spur gear (65),
washers (7), actuator cover (8), and gasket (9).
retaining ring (66), and key (67).
(3) Remove ring gasket (10) from actuator cover
(28) Remove four screws (68), cover (69), and
(8) or tube-gearbox shaft.
shims (70).
(4) Remove four screws (11) and carefully separate
actuator cover (12) from tube-gearbox to gain access to
wiring.
(5) Unsolder all wires from switches, filter, motor,
and resistor.
5-22
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