Section VI. MAINTENANCE PROCEDURES
Organizational Maintenance of Teletypewriter Reperforator-Transmitters TT-76(*)/GGC and TT-699(*)IGGC
is limited to:
Internal mechanical assemblies
Electrical contact surfaces
AC input voltage
Steel setscrews in aluminum and magnesium castings.
Bias potentiometer (TT-76/GGC ONLY)
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-
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).
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.
Be sure all equipment is properly installed. Check for proper positioning and tightening of all nuts, bolts and washers.