TM 9-1240-401-34&P
5-21. DOVE PRISM ASSEMBLY MAINTENANCE INSTRUCTIONS - continued
a. Removal
.
1
Remove setscrew (1) and setscrew (2).
Using fabricated spanner wrench, remove retainer
2
(3).
Remove dove prism assembly (4) from
3
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).
5-36
