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 287 of 590

TM 9-1240-401-34&P

26

Remove four screws (17), four lockwashers (18),

and rotating counter (15) from base (4).

CAUTION

When drilling correction counter, extreme care

must be exercised to prevent damage to

rotating counters.

27

Finish drilling two holes in rotating counter (15) for

two straight pins (16) and drill shaft of rotating

counter (15) for straight pin (19). Install straight pin

(19) to secure spur gear (14) to shaft of rotating

counter (15).

28

Position rotating counter (15) on base (4) and install,

but do not tighten four screws (17) and four

lockwashers (18).

29

Aline holes in rotating counter (15) with holes in

base (4). Install two straight pins (16) and tighten

four screws (17).

30

Remove setscrew temporarily installed in spur gear

(14).

NOTE

If correction counter is to be reinstalled,

perform steps 31 thru 33.

31

Aline holes of spur gear (14) to holes in shaft of

rotating counter (15) and install straight pin (19).

32

Install rotating counter (15) over two straight pins

(16) and install four screws (17) and four new

lockwashers (18).

33

Apply grease (item 6, appx B) to spur gear (14).

34

Rotate spur gearshaft (10) and check that counters

operate smoothly without binding.

Change 1

5.1-53