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 166 of 590

TM 9-1240-401-34&P

4-24. M145/M145A1 TELESCOPE MOUNT FINAL INSPECTION AND ADJUSTMENT

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c. MOUNTING M145/M145A1 TELESCOPE MOUNT ON CROSS-LEVELING FIXTURE

1 Install M145/M145A1 telescope mount (1) on fix-

ture adapter (2) and with keyway properly posi-

tioned, secure with four mounting bolts.

2 Apply a 24 VDC power source to M145/M145A1

telescope mount (1) and illuminate vials and count-

ers by turning toggle switch (3) to ON position.

3 Using M1A1 gunner’s quadrant on mounting sur-

face (4), level the fixture adapter (2).

4 Set fixture adapter (2) elevation indicator ring to

"0" .

5 Set elevation counter (5) and correction counter (6)

to “0”.

6 Install linkage assembly (8) on shaft of M145/

M145A1 mount and fixture adapter (2). Manually

center the disk assembly level (7) bubble. Secure

in a level position.

7 Set elevation counter (5) to 50 roils depression.

8 Operate elevation handwheel (9) on the cross-lev-

eling fixture (10) to center the disk assembly level

(7) bubble.

9 Set elevation counter (5) to 1333 mils.

10 Repeat step 8.

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