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 TM 9-1290-232-34&P
FINAL ADJUSTMENT
TOOLS: Level vial wrench (App C)
3 / 1 6 " flat tip screwdriver
PERSONNEL:
One
EQUIPMENT CONDITION: Elevation fire control quadrant on work bench
PRELIMINARY
PROCEDURES:
Do
performance
test
(Vol
I,
FRAME
1
Procedure
Step
Using level vial wrench, loosen ring (1) far enough for eccentric (2) to be turned.
1.
NOTE
Level
,
vial
bubble
(3)
must
be
able
to
travel
the
full length of the level vial tube (4) when using eccentric
(2). This means that you might have to turn the
micrometer knob (5).
2.
Level elevation fire control quadrant by finding the center of movement of level vial
bubble (3).
3.
Using screwdriver, turn eccentric (2) until level vial bubble (3) is centered.
NOTE
Make sure eccentric (2) does not move when
t i g h t e n i n g ring (1).
4.
Using level vial wrench, tighten ring (1).
5.
Using screwdriver, loosen three screws (6) holding micrometer knob (5).
Slip micrometer scale (7) so that 0 (zero) is lined up with index mark (8).
6.
7.
Using screwdriver, tighten three screws (6).
GO
TO
FRAME
2
II-5-2
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