TM 55-4920-328-13 (1)  of  the  cooling  tower  module  consists  of  a  wet  deck surface, a water distribution sprinkler system, and a set of   sectional   eliminators.      The   removable   wet   deck surface is wave-formed for optimum heat transfer and is made  of  extra-heavy  coated,  hot-dip  galvanized  steel. The water distribution sprinkler system, which distributes water evenly over the cooling tower fill area, consists of a spray header and removable steel branches (2).  The branches  and  closely  spaced  plastic  spray  nozzles  (3) are  held  in  place  by  snap-in  rubber  grommets  which permit  quick  removal  of  individual  nozzles  or  complete branches  for  cleaning  or  flushing.    The  eliminators  are constructed  of  extra-heavy  coated,  hot-dip  galvanized steel   and   are   removable.      The   eliminators   remove entrained    moisture    from    discharge    air    and    direct discharge  air  at  boosted  velocities  away  from  the  fan inlets.      A   flanged   expansion   'connector   (9)   ensures accurate  alignment  of  the  cooling  tower  module  eight- inch water out connection with the cold water well of the auxiliary  trailer  water  system.    Refer  to  paragraph  1- 4e(1)(b)  for  a  description  of  the  auxiliary  trailer  water system. (3) Diesel  engine  AC  generator  and  cable  set. The diesel engine ac generator and cable set (figure 7- 31),    hereinafter    referred    to    as    the    generator    set, provides primary 208v ac, 60 Hz, three-phase electrical power for METS operation.  The generator set consists of  a  skid-mounted  generator  (8),  two  cable  assemblies (6,7),   four   single-conductor   cables   (1),   and   a   ground wire (3) connected to an eight foot long ground rod (4). The  unit  Is  mounted  on  the  rear  deck  of  the  auxiliary trailer    assembly    (figure    1-31).        The    generator    set controls   and   Instrumentation   consists   of   a   generator control panel and a fault indicator panel both depicted in figure 2-8.  These panels, originally installed on the unit, have   been   removed   from   the   skid-mounted   unit   and have  been  installed  within  the  control  cab  module  for operator    convenience.        Electrical    power    for    diesel engine   starting   is   provided   by   two   12-volt   batteries. Cold weather quick starting is accomplished by the use of ether contained in a cylinder mounted on the side of the unit.  The engine primer system is controlled by use of   an   ENGINE   PRIMER   ON   switch   (38,   figure   2-8) located on the generator control panel.  The unit is also provided  with  an  engine  oil  pan  heating  element  with external   connections   available   for   field   installation   of winterization    equipment,    when    required.        The    load connections  on  the  generator  set  consists  of  four  studs mounted on the side of the unit to which the four single- conductor cables are attached. These cables interconnect  the  generator  set  and  the  auxiliary  trailer power   distribution   box.      Complete   instrumentation   is provided  on  the  generator  control  panel  for  controlling and   monitoring   the   unit   during   operation.      The   fault indicator  panel  in  the  control  cab  module  displays  out- of-tolerance   conditions   during   operation.      The   panel displays the following conditions: Low Oil Pressure Overspeed Short Circuit Undervoltage Reverse Power Coolant High Temperature No Fuel Overload Underfrequency Overvoltage A Test or Reset switch is provided on the fault indicator panel  to  check  the  fault  indicator  lamps  during  test  of the fault indicator circuits and to reset the circuits.  For complete operating and maintenance instructions of the generator set, refer to TM 5-6115-425-12. NOTE The design of the METS electrical system    permits    the    use    of    an alternate source of electrical power.      Refer   to   chapter   2   for instructions on connection points and power requirements. f. Engine Accessories. (1) Water   brake   torque   arm   assembly.      The water  brake  torque  arm  assembly,  Part  No.    TE12043- 01  or  -02  (figure  1-37)  consists  of  a  balancing  arm  (2), torque  arm  (1),  weights  (3,4),  platform  (5),  wire  rope assembly (8), and attaching hardware.  This torque arm assembly   provides   a   means   of   calibrating   the   water brake torque element assembly for T53, T55, T73, and T74   engines.      A   separate   calibration   arm   Part   No. 17A8572G01    (figure    1-37.1)    is    furnished    with    the adapter   for   T700   engines   (see   chapters   2   and   7). Principal    components    of    the    T700    calibration    arm consist  of  an  arm  (1),  weight  hanger  (3),  and  a  sliding weight mount (6, 7, and 8).  Refer to TB 55-4920-328-50 and  chapters  2  and  3  for  information  on  torque  system calibration procedures. Change 2  1-69