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 280 of 590

TM 9-1240-401-34&P

5.1-19 M15 QUADRANT MAINTENANCE INSTRUCTIONS - continued

c. Assembly - continued

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Apply grease (item 6, appx B) to two new preformed

packings (54 and 55) and to shaft (56) and quadrant

spacer (57).

Install shaft (56) and quadrant spacer (57) through

bosses of bracket (53) and into bushing of quadrant

housing.

Install woodruff key (58) into quadrant spacer (57)

and aline hole in spacer with straight pin (59).

Install two screws (60) into gear sector (61).

Apply grease (item 6, appx B) to teeth of gear sector

(61).

Aline keyway of gear sector (61) with woodruff key

on quadrant spacer (57).

Secure gear sector (61) to quadrant spacer (57) with

new lockwasher (62) and capscrew (63).

Apply grease (item 6, appx B) to worm gear and

bearing of wormshaft (64).

Install wormshaft (64) into housing.

Install ball socket seat (65) on wormshaft (64) with

beveled portion toward bearing.

Using adjustable spanner wrench, install ring (66).

Tighten ring (66) to eliminate end play of wormshaft

(64) and related parts.

Secure quadrant spacer (57) to bracket (53) with

three screws (67) and install screw (68).

Aline hole in shaft (56) with straight pin (69).

Secure shaft (56) to bracket (53) with three screws

(70).

Install retaining strap (71), valve stem (72), valve

core (73), and cap (74).

5.1-46

Change 1