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 TM 9-1290-232-34&P
S e c t i o n 4. MICROMETER
MICROMETER
MAINTENANCE
PROCEDURES
INDEX
Reference
(para)
Task
Disassembly
Assembly
MICROMETER DISASSEMBLY
TOOLS:
3/16" flat tip screwdriver
0 cross tip screwdriver (Phillips type)
3/32" drive pin punch
4 oz ball peen hammer
Machinist's scriber
"V" block
PERSONNEL:
One
EQUIPMENT
CONDITION:
Elevation
fire
control
quadrant
on
work
bench
Procedure
Step
1.
Using flat tip screwdriver, remove three screws (1) and three lockwashers (2) from knob
(3).
2.
Pull knob (3) and micrometer scale (4) from adapter (5).
3.
U s i n g scriber, make a mark on end of worm shaft (6) and on one side of adapter (5) where
tapered pin (7) is removed.
4.
Place adapter (5) in "V" block, while removing tapered pin, to avoid bending worm shaft
(6).
5.
Using punch and hammer, remove tapered pin (7).
6.
Remove adapter (5) and felt washer (8).
7.
Using scriber, make a mark on quadrant index (9) and on housing (10) so that the two
marks are lined up with each other.
Using Phillips screwdriver, remove three screws (11).
8.
9.
Remove
quadrant
index
(9).
END
OF
TASK
II-4-12
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