TM 9-1290-357-15
d. Unscrew magnifier assembly (10) with tu-
b. Unscrew and remove nut (4), and washer
bular wrench 51203451381 and remove assem-
(5).
bly.
c. Unscrew and remove clamping screw (1).
located in appendix B.
5-16. Disassembly of Orienting Mechanism
e. Place magnifier assembly in alcohol to dis-
and Related Parts
solve the synthetic paint that seals the lens (1)
in the cell (2).
located in appendix B.
f. Remove the separators (3) and lens (1) from
a. Drive out tapered pin (1) from each orien-
cell (2).
ting knob (2) and remove knobs and washers (3).
Note. Before removing any lens from the cell clean
b. Remove the screws (4) securing the plate
away as much of the sealing compound around the lens
(5) and spring tension clips (6) to housing (7).
as practical with ethyl alcohol or heat slightly to loosen
compound.
c. Remove plate (5) and clip (6).
Note. Where lenses are burnished into cells, the cell
d. Remove setscrew (8) and special screw (9)
should be carefully centered in a lathe and the burnished
which lock cap (10) in housing (7).
metal turned off or burnish clear, leaving enough to per-
mit reuse of cell.
e. Remove cap (10) with spanner wrench 5120
5958996.
5-14. Disassembly of Azimuth Worm
f. Remove worm (11), ball socket (12), and
Mechanism
spring plunger (13).
located in appendix B.
located in appendix B.
a. Drive out tapered pin (1) from knob (2)
Remove the housing (2) from the azimuth
g.
and slide knob off.
worm gear (6) by pulling housing and worm
b. Remove setscrew (3) securing cap (4) and
gear apart.
remove special setscrew (5) securing socket (6).
Unscrew cap and remove socket.
5-17. Disassembly of Telescope Assembly
c. Remove the screws (7) securing disk (8),
micrometer (9), drum (10) to adapter (11). Re-
located in appendix B.
move disk, micrometer, and drum.
a. Remove special screws (1) securing front
d. Drive out taper pined (12) from adapter
cover (2) with objective assembly (3), and special
(11) and slide off adapter.
screw (1) securing rear cover (4) with eyepiece
assembly (5) to telescope body (6).
e. Remove screw (13), securing index plate
(14) to shoe (15), and remove index plate and
b. Work two cover assemblies free from seal-
shoe.
ing compound.
f. Remove setscrew (16), securing adjusting
Note. Loosen setscrew (7) securing cover (4) to body
plug (17), and unscrew plug.
(6).
g. Remove spring (18).
5-18. Disassembly of Telescope Body
h. Remove worm (20) from body (21).
located in appendix B.
i. Remove plunger (19).
Remove and disassemble the porro prisms and
tubular level vial from the body assembly as
5-15. Disassembly of Orienting Mechanis
listed in a through c below:
and Housing Assembly
a. Press down and remove flat springs (1)
located in appendix B.
which hold the porro prisms (2) inside body
(3). Remove and retain springs (1).
Remove clamping screw (1) from housing
a.
(2) by driving out tapered pin (3) from round
Note. Prisms are staked in positions with shellac which
nut (4).
must be dissolved before removal using ethyl alcohol. If
