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 144 of 590

TM 9-1240-401-34&P

4-17. COUNTER BOX ASSEMBLY (KNOB) MAINTENANCE INSTRUCTIONS - continued

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b. Repair

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2

3

1

Remove corrosion, grease, and dirt from all parts.

Refer to TM 9-254 for cleaning instructions.

Visually inspect for missing or damaged parts.

Repair or replace parts in accordance with author-

ized parts listed in appendix D.

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c. Assembly

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1 Install shouldered shaft (10) in correction knob (5).

2 Install collar (9) on shouldered shaft (10) and se-

cure with headless straight pin (8).

3 Install correction knob (5) and secure with head-

less straight pin (4).

4 Install plug (7) and setscrew (6).

5 Apply oil to flat washer (3) and install in elevation

handwheel (2).

6 Aline hole in elevation handwheel (2) with hole in

shaft (11) and install tapered pin (1).

4-3 0