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 88 of 590
TM 9-1240-401-34&P
3-19. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS (M118A2) - continued
e. Installation
1 If two headless straight pins (7) were removed,
redrill using No. 44 (0.086) drill; drill 3/8 inch (9.53
mm) deep. Ream for drive fit in housing and slip fit
in level assembly (6).
2 Position level assembly (6) over housing and at-
tach wires (3) from wiring harness assembly using
machine screws (4 and 5). Remove tags.
3 Install level assembly (6) over two headless
straight pins (7) and secure with four new lock-
washers (2) and four machine screws (1).
f. Adjustment
1
2
3
4
5
6
7
8
9
Install M118A2 elbow telescope on howitzer and
level trunnions (ref. TM 9-2350-311-10).
Check that level (16) vial bubble is within the cen-
ter graduation marks of the vial. If bubble is not
within the center graduation marks, go to step 3.
Loosen threaded ring (13).
Engage fabricated eccentric tool into holder (14)
and threaded ring (13).
Insert a straight blade screwdriver through the cen-
ter hole in the eccentric tool.
Adjust cam (15) until level (16) vial bubble is cen-
tered.
Tighten threaded ring (13), being careful not to dis-
turb setting of vial.
Apply sealing compound (item 15, appx B) in the
space (A) between brass portion of level (16) vial
assembly and mount (9).
Apply sealing compound (item 13, appx B) to slot
(B) of threaded ring (13) and threads of mount (9).
3-30
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