TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 56 of 590
TM 9-1240-401-34&P
2-15. M146 TELESCOPE MOUNT FINAL INSPECTION
AND ADJUSTMENT - continued
a. CHECKING ELEVATION SLIDE/ELEVATION BRACKET END PLAY
I
1
2
3
4
5
Using feeler gage, check that maximum of
0.003-inch (0.008-mm) clearance between ma-
chined surface of elevation slide and elevation
bracket is maintained when the elevation knob is
rotated from stop to stop.
Remove two cap screws (1), two Iockwashers (2),
and cover assembly (3). Discard Iockwashers
Tighten or loosen three self-ocking nuts
(4)
until
correct clearance is attained.
Apply sealing compound to three self-locking nuts
(4).
Install cover assembly (3), two new Iockwashers
(2),
and two cap screws (1).
I
b. CHECKING ELEVATION KNOB TRAVEL
I
2
3
4
5
6
2-22
1
Rotate elevation knob (1) from stop to stop and
check amount of travel.
NOTE
Elevation knob must rotate 2-1/2 complete
revolutions. If the 2-1/2 revolutions cannot be
met, adjust elevation knob mechanism as di-
rected in steps 2 thru 6.
Loosen setscrew (2).
Loosen self-locking nut (3).
Adjust elevation shoulder screw (4) in or out to ob-
tain minimum travel requirements.
Tighten setscrew (2).
Tighten self-locking nut (3).
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