Figure 4-2. MS connector disassembly and assembly typical

TM 9-4931-363-14&P

(4) Do not use any shims (13) at this time. The

w i t h the LOD in the line of sight with a target of

opportunity at least 1000 meters away.

number used is determined in e below.

(5) When installing each T-1ock (5) and associated

(4) Mount the borescope in the boresight adapter

items (4) through (1), coat the threads of screw (1) with

and sight on the target. Loosen the C-clamp and center the

the same sealing compound as used for screw (36), as stated

reticle on the target by adjusting the position of the LOD.

Tighten C-clamp.

in step (1) above.

e. After assembly, check LOD adjustment as follows:

NOTE

(1) With rail clamp base assembly (9) locked in the

If an

adjustment must be made in step (5)

O-degree position and aligned approximately parallel to

below

and shimming was installed in step (1)

leveling base assembly (40), check the parallelism between

above,

insure that the shimming is not changed

the short axis of leveling base assembly (40) and rail clamp

during

the adjustment.

base assembly (9) as follows:

(5) Place the boresight in angle bracket (23) and view

(a) Use a pair of 4- to 6-inch calipers (dial or

the same target. The target should be centered on the

vernier type) to measure the distance between the top of

reticle within 3 roils. If not, loosen four screws (1 O)

rail clamp base assembly (9) and the bottom of leveling

attaching swivel plate (14) to swivel frame (19) and rotate

base assembly (40). Measure on each side of the LOD. Hold

swivel plate (14) to remove the error. Tighten screws (1 O)

the calipers in line with the center of the legs of swivel

and check that the target is centered on the reticle within 3

frame (19). Record the reading on each side of the LOD. If

roils. If the error still exceeds 3 roils, replace angle bracket

the two readings differ by more than 0.005 inch, loosen

(23).

four screws (10) and insert shim or shims (13) equal in

t h i c k n e s s to one-half the difference between the two

readings. Insert the shimming on screws (10) between

f. C h e c k t h e m a g n e t a l i g n m e n t a c c o r d i n g t o t h e

swivel frame (19) and swivel plate (14) on the side having

procedures of paragraph 4-25, linkage orientation device

the smallest reading.

magnet alignment.

(b) Tighten

screws

(10)

and

repeat

the

4-14. Cable Assembly W2 Disassembly and Assembly (fig.

measurements.

B-4).

(2) Install the 7.62-mm borescope adapter from the

a. R e m o v e i t e m s ( 1 ) t h r o u g h ( 8 ) i n d i s a s s e m b l y

7.62-mm boresight kit (NSN 4933-00-930-1957) in one of

sequence. U n s o l d e r and mark leads where necessary.

the grooves of rail clamp base assembly (9). Insure that rail

Assemble in reverse disassembly sequence.

clamp base assembly (9) is locked in the 0-degree position.

(The grooves in rail clamp base assembly (9) and the line of

b. Disassemble MS connectors in accordance with figure

sight of angle bracket (23) are parallel.)

4-2. Unsolder one wire at a time, withdraw it through the

resilient bushing, and tag it. Assemble in reverse

(3) Use a C-clamp to mount the LOD on a suitable

disassembly sequence.

rigid mount, with leveling base assembly (40) down and

Figure 4-2. MS connector disassembly and assembly typical

4-33