Figure 3-4. Diopter knob assembly-exploded view

(fig. 3-3) or items 1, 2, and 3 (fig. 3-11) from respective

(2) Clean packing in warm water with a mild

valve stems (7, fig. 3-3 or 4, fig. 3-11).

soap. Dry thoroughly.

d. Repair. Repair is limited to replacement of the

c. Inspection. Inspect parts of the Valve assembly

eyepiece assembly, packing, or hardware.

for wear, deterioration, and worn or broken threads.

e. Installation.

d. Repair. Repair is limited to replacement of any

(1) Apply a light film of grease, MILG-4343, to

defective or missing part.

packing (3) and install into groove on inside wall of the

e. Assembly. Assemble items in reverse order of

housing.

(2) Install eyepiece assembly (2) into the

disassembly.

housing. Secure with setscrew (1). Apply sealing

f. Installation. Apply sealing compound, MIL-S-

compound, MIL-S-11031, over head of setscrew.

11031, to threads of the valve stem and secure in

position.

3-6.

Replacement of Purging and Charging Valve

Assemblies (Figs. 3-3 and 3-11)

3-7.

Repair of Diopter Adjustment Knob Assembly

(Figs. 3-3 and 3-4)

a. Removal. Remove the valve assembly from

telescope eyepiece housing (fig. 3-3) or from the main

a. Removal (Fig. 3-3).

housing of reticle projector assembly (fig. 3-11).

(1) Remove items 8 and 9.

b. Disassembly. Disassemble items 4, 5, and 6

1-Screw, 6-40 x 15/32, 8590832

5-Pin, 3/32 x 6/16 (2),

9-Clutch, 8624617-2

2-Spring, compression, 5 coil,

MS16555-617

10-Pin, 1/16 x 1/4 MS16555-602

8590833

6-Dial, 8624531

11-Packing, 0.424 id, 8619853

3 -Setscrew, 4-40 x 3/16 (2),

7-Screw, 2-56 x 5/16 (3),

12-Adapter, 8624530

MS51021-10

MS61957-4

13 - Pin, 3/32 x 3/8 (2), MS16555-618

4-Knob, 8624520

8-Washer lock, No. 2 (3),

14-Housing, 8624529

MS35338-134

Figure 3-4. Diopter knob assembly-exploded view.

3-5