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 232 of 590

5-58

TM 9-1240-401-34&P

5-26. M117/M117A2 PANORAMIC TELESCOPE FINAL INSPECTION AND ADJUSTMENT

- continued

k. RESET COUNTER OPERATION AND ADJUSTMENT

1 Reset counter

(2) is rotated.

(1) must follow when azimuth knob

2 Push in and rotate reset knob (3) to return reset

counter (1) to 3200 mils.

3 Replace reset counter (1) (ref. para 5-23) if re-

quirements in steps 1 and 2 cannot be met.

l. GUNNER’S AID COUNTER OPERATION AND ADJUSTMENT

1 Rotate gunner’s aid knob (1) until a reading of 50

roils appears in gunner’s aid counter (2). Check

that reset counter (3) increases 50 mils.

2 Rotate gunner’s aid knob (1) until a reading of 50

roils appears in gunner's aid counter (4). Check

that reset counter (3) decreases 50 mils.

3 Replace gunner’s aid counters by replacing hous-

ing assembly (5) (ref. para 5-23) if requirements of

steps 1 and 2 cannot be met.