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TM 11-5820-890-20-2
8-24
8.3.
COMPONENT REPAIR. Continued
g.
VEHICULAR ANTENNAS (AS 3900) (AS 3916 is not repairable):
MAINTENANCE REQUIREMENT:
ACTIONS:
(1) Replace/clean/lubricate
antenna elements (1, 2)
(AS 3916 does not disassemble)
(1)
Remove RF cable (6) from antenna subassembly
(2)
Cut safety wire (3)
(3)
Unscrew antenna from antenna base
(4)
Unscrew upper and lower antenna elements (1, 2)
(5)
Clean, lubricate with silicone compound, or replace as appropriate
(6)
Install antenna elements (1, 2)
(7)
Install safety wire (3)
(8)
Install RF cable (6) to antenna subassembly
(2)
Replace antenna subassembly (4)
(1)
Remove antenna elements (1, 2)
(2)
Remove 4 bolts, with 2 washers each, and 4 nuts from antenna base
and bracket
(3)
Remove ground strap (7) from antenna subassembly
(4)
Remove gasket (5) and replace if required
(5)
Install good gasket on top of mounting bracket
(6)
Position good antenna subassembly on mounting bracket and
install ground strap (7)
(7)
Coat all washers with Type III RTV compound
(8)
Install washer on each of 4 bolts
(9)
Install 4 bolts in base
(10) Install washers and nuts and tighten
(11) Install antenna elements
(3)
Replace ground strap
(1)
Remove antenna subassembly
(2)
Remove ground strap (7) from antenna mounting bracket
(3)
Install ground strap (7) to antenna mounting bracket
(4)
Install antenna subassembly
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