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 278 of 590

TM 9-1240-401-34&P

5.1-19. M15 QUADRANT MAINTENANCE INSTRUCTIONS - continued

c. Assembly - continued

25

26

27

28

29

30

31

NOTE

Steps 25 through 31 apply to reinstallation of

existing shouldered shaft assembly.

Position ball socket seat (29) with beveled portion

against bearing of shouldered shaft assembly (30)

and install long end of shouldered shaft assembly

(30) through boss in housing (10).

Slide spur gear (31) onto shouldered shaft assembly

(30) with raised portion of gear facing away from

bearing of shouldered shaft assembly (30). Slide

worm gear (32) onto shouldered shaft assembly (30)

with end containing setscrew hole facing spur gear

(31).

Aline holes in gears (31 and 32) with holes in

shouldered shaft assembly (30) and install two

tapered pins (33).

Install ball socket seat (34) through boss in housing

(10) with tapered portion facing bearing of

shouldered shaft assembly (30).

Apply grease (item 7, appx B) and install new

preformed packing (35) into groove on ring (36).

Using adjustable spanner wrench, install ring (36)

into boss of housing (10) to secure shouldered shaft

assembly (30).

Tighten ring (36) to prevent end play in shouldered

shaft assembly (30) and related parts.

5.1-44

Change 1