Chapter 4. MAINTENANCE INSTRUCTIONS - TM-9-4931-363-14-P0091

TM 9-4931-363-14&P

CHAPTER 4

M A I N T E N A N C E INSTRUCTIONS

Section I. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT

4-1. General.

Refer to Appendix B for the list of repair parts. Special

t o o l s for maintenance and repair of the fire control

subsystem test set are listed in table 4-1. Refer to Appendix

C, Section III, for tool and test equipment requirements.

Table 4-1. Special Tools and Test Equipment

Reference

NSN or

Item

Use

reference

Paragraph

Figure

4931-00-124-5453

Organizational HSS boresight kit

1-4

1-20

HSS boresighting and

alignment

4933-00-930-1957

7.62-mm boresight kit

4-13

LOD alignment

Section II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

4-2. General.

Perform the self-test of the test set as described in

paragraph 3-6. Remove any dirt, dust, or grime with a soft

cloth and cleaning solvent conforming to MIL-A-6091

(diesel fuel, gasoline, and benzine are prohibited).

Section III. INSPECTION AND TEST

4-3. General.

4-5. Helmet Boresight Tool Inspection.

Inspect all mechanical parts to insure they are in good

a. Secure the rail clamp base of the linkage orientation

condition and are not bent, cracked, broken, or

device (LOD) in the O-degree position. Clamp the rail clamp

deteriorated. Inspect electrical parts for obvious damage to

base of the LOD (fig. 3-2) securely to a stable base.

insure they are not cracked, broken, or otherwise damaged.

Check for frayed or broken wires, loose or badly soldered

joints, and shorted terminals or connectors,

b. Attach the boresight tool to the magnet on the LOD.

4-4. Test Set Electrical Test.

c. Slightly loosen the elevation and azimuth locks on

Perform the electrical self-test, paragraph 3-6.

the LOD.

4-1