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 157 of 590

TM 9-1240-401-34&P

NOTE

Perform steps 16 thru 24 if new correction ro-

tating counter is installed. If reinstalling exist-

ing correction rotating counter, go to step 23.

16 Temporarily install a setscrew in gear (26) and

slide gear onto shaft of correction rotating counter

(22).

17 Secure correction rotating counter (22) on base

(36) using four new Iockwashers (21) and four ma-

chine screws (20).

18 Drill two pilot holes approximately 1/16 inch (0.16

mm) deep into base of correction rotating counter

(22) ensuring that drill bit does not damage numer-

als or correction rotating counter (22) shaft.

19 Remove correction rotating counter (22) from base

(36) and finish drilling holes in correction rotating

counter (22).

20 Drill, ream, and pin gear (26) to shaft of correction

rotating counter (22) using tapered pin (25).

21 Install mask (24) on correction rotating counter (22)

and secure with two machine screws (23).

22 Install two headless straight pins (34), in base (36).

23 Rotate shaft (37) counterclockwise to stop. Set cor-

rection rotating counter (22) to a reading of 9948.

24 Install correction rotating counter (22) on base (36)

and secure with four new Iockwashers (21) and

four machine screws (20).

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