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 210 of 590

TM 9-1240-401-34&P

I

5-21. DOVE PRISM ASSEMBLY MAINTENANCE INSTRUCTIONS - continued

a. Removal

.

1

Remove setscrew (1) and setscrew (2).

2

Using fabricated spanner wrench, remove retainer

(3).

3

Remove dove prism assembly (4) from

M117/M117A2 panoramic telescope (5).

4

Remove inserts (6 and 7) by pushing out with

scribe.

b. Repair

Repair is by replacement of authorized parts (ap-

pendix D).

c. Installation

1

Slide dove prism assembly (4) into M117/M117A2

panoramic telescope (5).

2 Apply grease to retainer (3). Using fabricated

spanner wrench, install retainer (3). Retainer (3)

applies tension to tube assembly (8). Tighten re-

tainer (3) only enough to eliminate end play in tube

assembly (8).

3

Install insert (7) and setscrew (2).

4

Install insert (6) and setscrew (1).

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