TM 11-5840-281-35/1
(29) Carefully rock worm shaft (71) back and forth
(8) Place seal (80) and bearing (79) in tube-
to remove bearings (72), then remove worm shaft (71)
gearbox (83), then carefully install screwjack (78) into
from tube-gearbox.
ram tube assembly (73).
(30) Rotate ram tube assembly (73) several turns
(9) Lubricate bearing (74) and helical gear (76) with
counterclockwise, then press on end of ram tube
grease MIL-G-23827.
assembly to force bearing (74) free of tube-gearbox.
(10) Place key (77) in keyway on screwjack (78),
(31) Continue rotating and pressing on end of ram
then install helical gear (76), flat washer (75), and
tube assembly (73), removing flat washer (75), helical
bearing (74) on screwjack.
gear (76), key (77), screwjack (78), bearing (79) and seal
(11) Lubricate worm shaft (71), bearings (72), and
(80) as they become free of tube-gearbox.
spur gear (65) with grease MIL-G-23827.
(12) Carefully install worm shaft (71) into tube-
gearbox, engaging helical gear (76).
NOTE
(13) Install bearings (72) on worm shaft (71) and
If bearing (79) and seal (80) are not
secure one side in place with retaining ring (66).
forced out, remove them after screwjack
(14) Position shims (70) and secure in place with
(78) is free of tube-gearbox.
cover (69) using four screws (68).
(32) Unscrew and remove end cap (81) and
NOTE
preformed packing (82).
(33) Carefully slide ram tube assembly (73) from
Add or remove shims (70) to obtain
tube-gearbox (83).
minimum end play without binding of
worm shaft.
b. Assembly. To assemble the antenna servo actua-
tor, proceed as follows:
(15) Place key (67) in keyway on worm shaft (71),
(1) Lubricate screwjack (78) with grease MIL-G-
then install spur gear (65). Secure in place with retaining
23827 and temporarily install in ram tube assembly (73).
ring (64).
(2) Install screwjack (78) to full limit of travel and
(16) Lubricate fastener stud (63), spur gear (64),
check for hydraulic lock or air compression.
sleeve bearing (62), and spur gear (61) with grease MIL-
G-23827.
(17) Install fastener stud (63) into tube-gearbox
NOTE
(83).
If there is hydraulic lock or air
(18) Install sleeve bearing (62) and spur gear (61)
compression, remove excess grease
on fastener stud (63). Secure in place with retaining ring
from screwjack and ram tube assembly
(60).
until full limit of travel can be obtained
(19) Install cover (59) using five screws (58).
without hydraulic lock or air compres-
(20) If gearshaft (52) was disassembled, reassem-
sion.
ble from pin (55), helical gear (56), and shaft (57).
(21) Install retaining rings (54) on gear- shaft (52),
(3)
Remove screwjack (78) from ram tube
then carefully install into tube-gearbox (83), engaging
assembly (73).
screwjack (78) spiral gear.
(4) Apply light film of grease MIL-G-23827 to
(22) Install bearings (53) on gearshaft (52).
outside of ram tube assembly (73) and install into tube-
(23) Install cover (51) using four screws (50).
gearbox.
(24) Loosely attach cam (49) using screw (48).
(5) Apply light coating of grease MIL-G-23827 on
(25) Attach mounting bracket (47) using four
preformed packing (82) and install in- side end cap (81).
screws (46).
(6) Apply light film of grease MIL-G-23827 to inside
(26) Loosely attach cam (45) using screw (44).
surface of end cap (81). Screw end cap (81) into end of
tube-gearbox (83) over ram tube assembly (73).
(7) Lubricate bearing (79) with grease MIL-G-
23827.
5-23
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