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 TM 9-1290-335-34&P
5-3.
BACKLASH ADJUSTMENT (CONT)
FRAME 2
Step
Procedure
1.
Using scriber, make a mark on housing (1) and drive gear (2).
2.
Check that all three pointers point to "O".
3.
If pointers do not point to 0, look at gearing (para 4-22 and 4-27).
4.
Turn gunner's aid dial (3) until its "0" is lined up with micrometer pointer (4).
5.
Turn drive gear (2) clockwise until micrometer pointer (4) points at 50 on gunner's aid
dial (3).
6.
Turn drive gear (2) counterclockwise until scribe marks are lined up.
7.
Check that micrometer pointer (4) is pointing between "0" and midpoint to first marking
on gunner's aid dial (3).
8.
If pointer is not pointing correctly, loosen setscrew (5) using Allen wrench. Using
screwdriver, turn stud (6) fully clockwise, then turn stud (6) counterclockwise 1/8 turn.
Repeat steps 4 thru 7 until correct response is seen. Tighten setscrew (5).
GO TO FRAME 3
Vol II
Para 5-3 Cont
5-3
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