TM 11-5840-281-35/1
see figures 3-43 through 3-76 located at the end of this
(14) Loosen nut (9) on azimuth servo
chapter. Refer to paragraphs 3-47 through 3-49 for
actuator shaft and remove rod end (10) and nut (9).
repair instruction. After removal and replacement of a
(15) Remove screw (11), lockwasher (12),
unit or assembly, test the unit or assembly in accordance
and fiat washer (13).
with procedures outlined in chapter 4.
(16) Separate wire rope assembly (14) from
pin (15).
(17) Remove nut (16), screw (17), lock-
3-51. Removal and Replacement of Azimuth Servo
washer (18), and fiat washer (19).
Actuator
(18) Separate wire rope assembly (20) from
pin (21).
b.
Replacement.
Replace azimuth servo
a. Removal. To remove azimuth servo actuator,
actuator as follows:
proceed as follows: (1) Remove four screws (1) and
(1) Attach wire rope assembly (20) to pin
lockwashers (2).
(21).
(2) Separate waveguide (3) from azimuth
(2) Attach other end of wire rope assembly
horn and polarizer.
(20) to azimuth antenna yoke (26) using nut (16), screw
(3) Remove preformed packing (4) and
(17), lockwasher (18), and flat washer (19).
adapter (5).
(3) Attach wire rope assembly (14) to pin
(4) Remove dehydrator (6) from adapter
(15).
(5).
(4) Attach other end of wire rope assembly
(5) Install cover (7) over azimuth horn and
(14) to azimuth antenna (22) using screw (11),
polarizer waveguide using four screws (1) and
lockwasher (12), and flat washer (13).
lockwashers (2).
(5) Screw nut (9) and rod end (10) on
azimuth servo actuator (8).
NOTE
(6) Position shaft end of azimuth servo
actuator (8) in clevis on azimuth antenna (22) and secure
Preformed packing should be left on open
in place with pin (15).
azimuth horn and polarizer guide before cover
(7) Position other end of azimuth servo
(7) is installed.
actuator (8) in clevis on azimuth antenna yoke (26) and
secure in place with pin (21).
(6) Release waveguide coupler on azimuth
(8) Secure azimuth servo actuator cable to
antenna yoke and remove waveguide (3) from azimuth
azimuth antenna yoke with two clamps provided.
antenna yoke.
(9) Remove connector cover from
(7) Install waveguide cover attached to
connector J1002.
wave- guide coupler over open azimuth antenna yoke
(10) Connect connector P1002/P504 from
waveguide with waveguide coupler.
azimuth servo actuator cable to connector J1002.
(11) Release waveguide coupler on
NOTE
azimuth antenna yoke and remove cover from
waveguide.
Preformed packing should be left on open
(12) Remove four screws (1), lockwashers
azimuth antenna yoke waveguide before cover is
(2), and cover (7) from azimuth horn and polarizer
installed.
waveguide.
(8) Disconnect connector P1002/P504 from
NOTE
J1002.
(9) Insall connector cover on connector
Preformed packing should be left on open
J1002.
waveguide when covers are removed in steps
(10) Release two clamps holding azimuth
(11) and (12).
servo actuator cable.
(11) Remove pin attaching azimuth servo
(13) Install dehydrator (6) in adapter (5).
actuator to azimuth antenna.
(12) Remove pin attaching azimuth servo
actuator to azimuth antenna yoke.
(18) Remove azimuth servo actuator (8)
from the azimuth antenna assembly.
3-56
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