Section VI. MAINTENANCE PROCEDURES

TM 11-5815-238-20

Section VI. MAINTENANCE PROCEDURES

2-17. GENERAL

Organizational Maintenance of Teletypewriter Reperforator-Transmitters TT-76(*)/GGC and TT-699(*)IGGC

is limited to:

1. INSPECTION

Installed items

2. CLEANING

Internal mechanical assemblies

Electrical contact surfaces

3. TESTING

AC input voltage

4. PAINTING

Metal Surfaces

5. LUBRICATING

Steel setscrews in aluminum and magnesium castings.

Felt washers (friction clutches).

6. ADJUSTMENT

Motor speed

Rangefinder dial

Bias potentiometer (TT-76/GGC ONLY)

NOTE

All procedures are the same for TT-76(*)/GGC as for TT-699(*)/GGC.

2-18. TOOLS, TEST EQUIPMENT AND MATERIAL REQUIRED OF ORGANIZATIONAL MAINTENANCE.

All tools you will need for maintenance on ANIGGC-3(*) and AN/GGC-53(*) are in Tool Equipment, TE-

50-B.

Required test equipment: Multimeter AN/USM-451.

Required material: Cleaning solvent (SD)

Trichlorotrifluoroethane (NSN 6850-00-105-3084)

Lubricant: Oil (NSN 9150-00-223-4129).

WARNING

Fumes of TRICHLOROTRIFLUOROETHANE are poisonous.

Provide adequate ventilation

whenever you use TRICHLOROTRIFLUOROETHANE. Do not use solvent near heat or open flame.

TRICHLOROTRIFLUOROETHANE will not burn, but heat changes the gas into poisonous, irritating

fumes. DO NOT breathe the fumes or vapors TRICHLOROTRIFLUOROETHANE dissolves natural

skin oils. DO NOT get the solvent on your skin. Use gloves, sleeves and an apron which the

solvent cannot penetrate. If the solvent is taken internally, see a doctor.

2-19. INSPECTION

Be sure all equipment is properly installed. Check for proper positioning and tightening of all nuts, bolts and washers.

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