TM 11-5840-281-35/1
(16) Slide cam (171) along cam shaft (165) until
NOTE
in position to actuate switch (139). Secure in place with
The large gear on spur gear (95) should
hub clamp (163).
mesh with the small gear on spur gear
(17) Install bearings (64 and 75) and shim (74) in
(100).
elevation drive housing.
(30) Install two seals (91) and bearing (94) in
cover (89).
NOTE
Do not install spur gear (71) or seal (73)
until instructed.
NOTE
The seal closest to bearing (94) should
(18) Install elevation drive shaft (72) and secure
be installed so its exposed spring is
in place using nut (62) and key washer (63).
away from the bearing.
(19) Remove 0.002-inch laminations from shim
(74) until end play of elevation drive shaft is barely
(31) Carefully insert shaft of spur gear (92)
detectable.
through bearing and seals in cover (89), making sure
bearing and seals seat properly on spur gear shaft.
(32) Install bearing (93) on spur gear (92) and
NOTE
preformed packing (90) in slot on cover (89).
Removing laminations increases end play.
(33) Carefully install cover (89) on elevation drive
(20) When proper end play is obtained, remove
housing (215), making sure bearings (93, 98, and 101)
elevation drive shaft from elevation antenna housing.
seat properly, then secure cover in place using 18
(21) Install seal (73) in elevation drive housing,
screws (86), lockwashers (87), and flat washers (88).
then while holding spur gear (71) in place, carefully insert
(34) Install retaining ring (108) on shaft (113).
elevation drive shaft in place and secure with nut (62)
(35) Lubricate bearings (112) with grease MIL-4-
and key washer (63).
23827, then install bearings in synchro mount (120).
(22) Attach spur gear (71) to elevation drive
(36) Insert shaft (113) through bearings (112),
shaft (72) using three screws (68), lockwashers (69), and
then slide spacer (111) and spur gear (110) on shaft.
flat washers (70).
(37) If spur gear (110) and shaft (113) have
(23) Slide spur gear (170) along cam shaft (165)
already been drilled to accept pin (109), proceed to step
until fully meshed with spur gear (71).
(39). If not, press spur gear on shaft so there is
Secure in place with hub clamp (163).
minimum end play without binding, then temporarily
(24) Attach variable resistor (155) to elevation
secure in place with 6-32 screw.
drive housing using three rim clamps (154).
(38) Drill 0.935/0.945-inch hole through spur
(25) Slide spur gear (157) and hub clamp (156)
gear (110) and shaft (113) using predrilled indent in spur
on variable resistor shaft and align spur gear to fully
gear as pilot hole.
mesh with spur gear (168), then secure spur gear (157)
(39) Install pin (109) in prepared holes in spur
in place with hub clamp (156).
gear and shaft.
(26) Position gasket (153) and cover (152) over
(40) Slide spur gear (97) on spur gear (95).
variable resistor (155), then secure in place with seven
(41) If spur gear (97) and spur gear (95) have
fasteners (151).
already been drilled to accept pin (96), proceed to step
(27) Lubricate bearings (93, 94, 98, and 101)
(44). If not, temporarily install synchro mount (120) using
with grease MIL-G-23827.
four screws (105), lockwashers (106), and flat washers
(28) Place gears (101) on spur gear (100) and
(107), then proceed with following step.
insert spur gear into elevation drive housing, making
(42) Position spur gear (97) so it is fully meshed
sure bearing (101) seats properly.
with spur gear (110), then temporarily secure in place
(29) Install seal (99) in elevation drive housing,
with A-40 screw.
then install bearings (98) on spur gear (95) and carefully
(43) Drill 0.935/0.945-inch hole through spur
insert spur gear into elevation drive housing.
gears (95 and 97) using predrilled indent in spur gear
(97) as pilot hole.
5-47
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