Disassembly of Eyepiece Assembly

Disassembly of Azimuth Worm Mechanism

Disassembly of Instrument light M2

TM-9-1290-357-15 Aiming Circle M1 W/E 1290-671-6145 Manual
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TM 9-1290-357-15

b. Place a scribe mark on cell (2) to line up

rubber cement has been used to stake prisms remove

cement with rubber solvent.

with crossline on reticle (3).

b. Remove and retain porro prisms (2).

c. Using lens tissue paper between the fingers,

apply a slight pressure to free the reticle (3)

c. Only if damaged, remove and replace tubu-

from the cell (2).

lar level vial as listed in (1) through (3) below:

Caution: Reticle is not sealed in the cell, how-

(1) Remove the two setscrews (4).

ever, exercise care when pushing out the reticle

(2) Unscrew and remove plugs (5).

as it may become chipped if allowed to tilt.

(3) Using a small piece of shim stock (or

equivalent), remove the cal--cined gypsum (plas-

522. Disassembly of Objective Assembly

ter of paris) from around the vial (6) and remove

Note. Item numbers shown below refer to figure B16,

damaged vial from body assembly (3).

located in appendix B.

d. Remove window (7) and detent (8) only

a. Loosen headless screw (1).

if defective.

b. Using tubular wrench 5120-345-1393 un-

screw retaining ring (2) and remove adapter (3).

519. Disassembly of Eyepiece Assembly

Note. It may be necessary to apply heat to soften the

Note. Item numbers shown below refer to figure B11,

optical lens sealing compound to release adapter from

located in appendix B.

front cover.

a. Remove headless setscrew (7) which locks

c. Remove headless screw (1) and remove cell

eyepiece assembly (5) to cover (4). Unscrew

assembly (4) from cover (5).

and remove the eyepiece assembly.

Note. Item numbers shown below refer to figure B13,

523. Disassembly of Objective Cell

located in appendix B.

Assembly

b. Remove the special screw (1) from the fo-

Note. Item numbers shown below refer to figure B17,

cusing sleeve (2).

located in appendix B.

a. Clean away as much of the sealing com-

c. Remove the focusing sleeve (2) from lens

pound as practical from the cell assembly by

cell assembly (3).

heating slightly or with ethyl alcohol.

d. Using tubular wrench 51203451384 re-

b. Unscrew and remove retainer (1) from cell

move the retaining ring (4) from reticle assembly

(2).

(5) to adapter (6). Remove reticle assembly (5)

from adapter.

c. Using lens tissue paper between the fingers

apply slight pressure to free the objecitve lens

5-20. Disassembly of Lens Cell Assembly

(3). Refer to caution outlined in paragraph 5-21

c above.

Note. Item numbers shown below refer to figure B14,

located in appendix B.

Note. Place an identification mark on the edge of the

lens and cell to insure the same positioning upon assembly.

Using tubular wrench 51203451388 un-

screw retaining ring (1).

524. Disassembly of Tripod M5

b. Remove the eyelenses (2), and separator

Note. Item numbers shown below refer to figure B18,

(3), from cell (4).

located in appendix B.

Note. It may be necessary to apply heat to soften the

a. Remove plug (1) from support tube (2)

optical lens sealing compound.

and tripod head (3).

5-21. Disassembly of Reticle Assembly

Note. If plug head is larger than support tube, it should

be turned down to 0.920.010 inch and knurled with a

Note. Item numbers shown below refer to figure B15,

coarse knurl.

located in appendix B.

Note. Item numbers shown below refer to figure B19,

Using tubular wrench 51203451384, un-

located in appendix B, unless otherwise indicated.

screw and remove retaining ring (1) from cell

(2).

b. Holding the round nut (1) with plier loosen

5-4

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