TM 9-1240-401-34&P
5-17. M117/M117A2 PANORAMIC TELESCOPE MAINTENANCE INSTRUCTIONS
- continued
c. Assembly - continued
16
Apply grease (item 6, appx B) to plunger (27).
17
Install plunger (27) with hole alined for installation
of worm shaft (26).
18 Apply grease (item 6, appx B) to worm gear and
bearing surface of worm shaft (26).
19
Using adjustable spanner wrench, install worm
shaft (26) and related parts into upper housing (12)
and rotate wormshaft assembly to engage with
worm gear in M117/M117A2 panoramic telescope.
20 Apply grease (item 6, appx B) to spring (24).
21
Install spring (24) and plug (23).
22
Apply grease (item 7, appx B) to new preformed
packing (13) and install on lower housing (11).
23
Install lower housing (11 ) on upper housing (12)
and secure with six new Iockwashers (6, 8, and 10)
and six cap screws (5,7, and 9).
24
If removed, install headless straight pin (14).
25
26
27
28 Apply grease (item 7, appx B) to new preformed
packing (39).
29
Install new felt mechanical washer (40), preformed
packing (39), and coupling (38) on upper housing
(12).
30
Push to seat cap (3) on upper housing (12).
31
Rotate cap (3) by turning azimuth knob and install
50 balls (4).
32
Install plate (2) and two machine screws (1).