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Figure 3-7. Deflection and elevation boresight housing assembly--partial exploded view
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TM-9-1240-311-34 Telescope Articulated: M127 (1240-437-1254) and M127A1 (M127E1) (1240-148-8539) and Hanger Assembly (1240-906-79451) Manual
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Figure 3-8. Horizontal or vertical boresight control dial and reticle missile lamp assembly-partial exploded view
1 - Screw. 6-32 x 3/8, (8),
Dial, boresight deflection
13 - Washer. lock. No. 2, (6),
MS51957-28
8624572-2
MS35338-n-134
2-Washer. lock. No. 6, (8),
7 - Screw, 6-40 x 3 /, (2), 8590832
14 - Clutch, (2), 8624617-1
MS35333-71
8 - Spring. compression, 5 coils, (2),
15 - Packing. 0.424 id. (2). 86195853
3 - Pointer, (2). 8624618
8590833
16 - Screw, 2-56 x 1/4 (4,, MS51959
4 - Nut. 11/16-32. (2) 8624702.
9 - Knob, (2) 8624524
17 - Plate. 1.0 id. 8624645
5 - Washer. spring, 0.690( id, (2),
10 - Spacer. 0.937 id. (2), 8624704
18 - Window. 8624642
8624709
11 - Stop, (2). 8624714
19 - Screw, 4-40 x 5/32, 862649
6 - Dial boresight elevation.
12 - Screw. 2-56 x 1/4, (6),
8624572-1
MS51957-3
Figure 3-7-Continued.
(1) Clean  all  metal  parts  with  a  cloth
(2) Reach into housing opening and unsolder
moistened with dry cleaning fluid.
wire lead from receptacle assembly.
(2) Clean rubber packing in warm water with a
(3) Remove setscrew (21).  Carefully pull
mild soap. Dry thoroughly.
lamp assembly (22) from housing.
e. Repair. Repair is limited to replacement of the
b. Installation.
packing, spring, and hardware.
(1) Position lamp assembly (22) into housing.
Ensure wire lead is free of obstacles and solder to
f. Assembly.
receptacle assembly.
(2) Install remaining parts in reverse order of
(1) Apply a thin film of grease, MIL-G-4343 to
removal.  Apply sealing compound, MIL-S-11031, to
packing (16) and insert into the groove of adapter (17).
threads of setscrew (21).
(2) Apply a thin film of grease, MIL-G-23827,
to the inner and outer surfaces of adapter (17) and install
setscrew (15) into the adapter.
3-14.
Replacement of Receptacle Assembly (Fig. 3-
Screw in until the tip protrudes 3/16-inch on the vertical
11)
dial, or 3/4-inch on the horizontal dial.
(3) Install retainer (14) over setscrew and
a. Removal.
check length of screw tip. (See (2) above).
(1) Remove screw (18, fig. 3-8), washer (19),
(4) Install  plate  (12)  over  locating  pin
and cover (20) from housing.
protruding from bottom of the retainer.
(2) Reach into housing opening and unsolder
(5) Install items 11, 10, 9, and 8 on the
wire lead from pins "A" and "B" of receptacle assembly
adapter.
(6) Apply a thin film of grease, MIL-G-23827,
(3) Reach into housing and release receptacle
to the entire surface of adapter (9). Position knob (7)
ground wire by removing items 5 and 6.
over adapter. Push in until serrations on plate and knob
(4) Remove items 7 and 8. Pull receptacle
mate.
assembly (9) from housing.
(7) Install spring (6) into cavity of the knob
and secure with screw (5).
b. Inspection.
(1) Inspect  hardware,  check  for  worn,
g. Installation.
broken, or burred threads, rust or corrosion.
(1) Apply a thin film of grease, MIL-G-4343, to
(2) Inspect receptacle, check for broken or
packing (3) and insert into groove of housing on dial (4).
cracked insulation, rust or corrosion.  Check wire for
(2) Insert dial (4) through opening in housing.
frayed, worn, or cracked insulation.  Check soldered
Ensure that screw tip, (see para f(2)) is in contact with
connections between receptacle and terminal.
the reticle assembly.
(3) Position washer (2), secure with screw (1).
c. Repair Repair is limited to replacement of the
receptacle assembly. Wire attached to terminal "C" is
3-13.
Replacement  of  Reticle
Missile
Lamp
supplied with receptacle.
Assembly (Fig. 3-8)
d. Installation.
a. Removal.
(1) Install
receptacle
assembly
(9)
into
(1) Unscrew item 18.  Remove washer (19)
and plate (20).
3-11

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