TM 9-2350-247-10EQUIPMENT DESCRIPTION — Continued 0002 00CAL .50 MACHINE GUN MOUNTING KIT (M94A1 MOUNT)Used to permit mounting a cal .50 machine gun M2 over the carrier cab. The kit is similar to the kit above, except that it usesa ring mount M49A1 in place of the mount M66. This kit cannot be used to mount a 7.62 mm machine gun M60. See Cal .50Machine Gun Mounting Kit (M49A1 Mount) illustration under Location and Description of Major Components. SeeEquipment Data table for details.7.62 MM MACHINE GUN MOUNTING KITUsed to mount a 7.62 mm machine gun M60 over the carrier cab. The kit is similar to the cal .50 machine gun mounting kit,except that the pintle and cradle of the M49A1 mount are replaced by a 7.62 mm pintle, platform assembly, and cradle. Thekit does not include a cartridge case deflector or tripod stowage brackets. See 7.62 MM Machine Gun Mounting Kitillustration under Location and Description of Major Components. See Equipment Data table for details.CAL .50 MACHINE GUN KITMay be authorized to increase the defensive capability of the carrier. A suitable machine gun mounting kit must be installedon the carrier. See Cal .50 Machine Gun M2 illustration. A tripod mount M3 may be issued with the machine gun and stowedon the machine gun mounting kit when ground-emplacing the machine gun may be desired. See Machine Gun Mount M3illustration under Location and Description of Major Components, to see the tripod mount.7.62 MM MACHINE GUN M60May be authorized to increase the defensive capability of the carrier. A suitable machine gun mounting kit must be installedon the carrier. See Cal 7.62– MM Machine Gun M60 illustration under Location and Description of Major Components to seethe 7.62 mm machine gun.COOLING SYSTEMThe vent fan draws air in through the radiator, circulates it around the power plant, and expels it through the exhaust grilleabove the vent fan. The vent fan is belt-driven from the engine crankshaft. The auxiliary radiator tank, located on thetransverse beam, provides space for the separation of air and liquid coolant. See Cooling System illustration under Locationand Description of Major Components.NUCLEAR, BIOLOGICAL, AND CHEMICAL (NBC) SYSTEM (M548A3)The NBC air filter system consists of one M1A1–19 precleaner and particulate filter assembly, two M-18 gas canisters, andhoses and connectors for each crew station. The purpose of this system is to provide clean, filtered, pressurized air free oftoxic agents to the M25A1 tank’s mask at each crew station. The unit is controlled by the NBC switch on the master controlpanel.The M1A1–19 precleaner assembly and particulate filter assembly contains the precleaner and a particulate filter. Theprecleaner is mounted on the assembly housing and consists of an electrically driven fan and dual dust separators. The fandraws air into the assembly housing from the carrier interior through slotted openings in the center section of the assemblyhousing. There is a spring clip attached to the outer surface of the assembly housing. The spring clip is used to cover theslotted openings in the center section of the assembly housing when the unit is not in use.The fan forces the air into the dust separators which remove heavy particles from the air. The air then passes to the M19particulate filter mounted in the assembly housing. The M19 particulate filter is a throw-away filter made of pleated filtermaterial and paper separators, encased in a metal container. The M19 particulate filter removes fine dust and aerosols fromthe air. The air then goes out of the housing assembly and is ducted to two M18 gas filter canisters through two air hoses.Each M18 gas filter is made of activated charcoal encased in a metal canister. The M18 gas filters remove toxic agents fromthe air. The air is then ducted to the orifice connector assemblies at each crew station by way of air hoses and adapters.0002 00-3
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