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LINKLESS AMMUNITION LOADING SYSTEM (MHU SERIES)
Drum Loader Assembly MHU-133/E32K

Aviation Ordinanceman - Aviation theories and other practices
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The drum adapter assembly is a box-type structure that allows the transporters to be stacked. Four hinge plates and four quick-release pins are used to lock the transporter onto the MHU-191/M transporter. Two lifting lugs (on 30-inch centers) mate with a weapons carrier so that an overhead crane can be used to lift the transporter. Additionally, there are two forklift pockets that allow the forklift truck to move the transporter. There are four tie-down rings to secure the transporter to the deck. Foldout steps, if needed, are located at the exit end of the transporter to provide personnel with the additional height to operate the LALS. The ammunition drum is a cylindrical structure that consists of an outer drum structure, an inner drum, two scoop disk assemblies, and two cover assemblies. OUTER DRUM.—The  outer  drum  is  a  storage container for ammunition, and it provides a housing for the inner drum. There is a rounds-remaining indicator window  so  you  can  determine  the  number  of  rounds remaining  in  the  drum.  The  drum  partitions,  mounted longitudinally within the outer drum to hold the rounds in place, hold the rounds radially around the outer drum with their bases in an outward direction. INNER DRUM.—The  inner  drum  is  a  welded assembly with a mounting ring at each end. There are sheet  metal  leaves  welded  to  the  outer  surface  of  the core  that  form  a  double-lead  helix.  When  the  inner drum  is  rotated,  it  moves  the  rounds  along  the  drum partitions from the entrance end to the exit end of the drum. SCOOP DISK ASSEMBLIES.—A  scoop  disk assembly  is  mounted  on  each  end  of  the  inner  drum. There  are  three  rails  on  the  scoop  disk  assemblies, forming  a  continuation  of  the  inner  drum  helix.  Also, two sets of gear-driven sprockets and scoop extensions are located on the scoop disks 180 degrees apart. These sprockets  and  scoop  extensions  transfer  the  rounds from the entrance cover to the outer drum partitions and from  the  outer  drum  partitions  to  the  exit  cover.  The entrance  scoop  disk  has  two  pins  that  hold  the  scoop extensions closed when they are activated by a cam in the  outer  drum.  This  prevents  feeding  rounds  into  the empty space where the drum partitions cannot control the rounds. DRUM COVER ASSEMBLIES.—A drum cover assembly  is  mounted  on  each  end  of  the  outer  drum. The  drum  cover  assemblies  accept  rounds  from  the entrance   unit,   load   units,   or   from   the   scoop   disk assembly. It then places the rounds into the scoop disk assembly (entrance end) or exit unit, respectively. The retainer partitions on the retainer gear maintain control of  the  rounds  between  the  scoop  disk  assemblies  and the entrance or exit units. A spring-loaded timing pin on each  drum  cover  is  used  to  index  the  drum  during installation of the entrance and exit units. The exit drum cover  assembly  also  contains  brackets  for  mounting  a drive assembly. 7-11 Figure 7-13.—Transporter.







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