TM 5-6115-593-12 TO 35C2-3-463-1 open.  Upon reaching their full-open position the louvers set  the  travel-limit  switches  to  their  opposite  position, deactivating   the   louver   motors.      Louver   operation   at shutdown  is  exactly  the  same  except  that  the  motors operate  in  a  reverse  direction  and  24V  DC  is  applied through the normally closed contacts of the deenergized louver control relays. The  shutter  assembly  (there  are  two)  is  automatically operated  by  a  hydraulic  control  assembly  (figure  5-5) through   which   coolant   is   allowed   to   flow.      With   the engine  cold,  the  spring-loaded  shutters  are  held  closed by  the  control  assembly.    As  the  coolant  warms,  the hydraulic  medium  (wax)  melts.    The  control  assembly relaxes its hold and allows the shutters to open.  There is a direct correlation between coolant temperature and the extent of shutter opening. 5-22. INSTALLATION.  The housing kit is installed by mounting its component sections directly onto the base assembly    and    the    support    frame    assembly    in    the following   sequence:   door   and   shutter   assembly,   left side,   front   (radiator   end),   right   side,   rear,   top,   and electrical   harness.      Installation/assembly   is   normally performed at the Direct Support Maintenance level. 5-23. LUBRICATION.        The    housing    kit    door    and shutter  assemblies,  access  doors,  and  all  moving  parts require   lubrication   in   accordance   with   the   lubrication order  LO5-6115-593-12.    Army  personnel  shall  refer  to DA PAM 310-4 and Marine Corps personnel to SL-1-3 to ensure  that  the  latest  edition  of  the  lubrication  order (LO) us being used. 5-24. PREVENTIVE  MAINTENANCE  CHECKS  AND SERVICES (A, N, MC).  To ensure that the housing kit is  always  ready  for  operation,  inspect  systematically  so that  defects  may  be  discovered  and  corrected  before they  result  in  serious  damage  or  failure.    Perform  the preventive maintenance checks and services in accordance with table 5-7.  Air Force users shall refer to the applicable inspection manuals and work card sets in T.O. 35C2-3-series for periodic maintenance requirements   and   table   5-7   for   detailed   procedures. Marine Corps users shall refer to the current issue of TM 11275-15/1. 5-25. ORGANIZATIONAL TROUBLESHOOTING. Table     5-8     contains     information     for     locating     and correcting  operating  troubles  which  may  develop  in  the generator set when equipped with the housing kit.  Each malfunction is followed by a list of tests or inspections to determine    probable    causes    and    corrective    actions. Perform  the  tests  or  inspections  and  corrective  actions in  the  order  listed.    Any  trouble  beyond  the  scope  of organizational maintenance shall be referred to the next higher level of maintenance. 5-26. ORGANIZATIONAL   MAINTENANCE   OF   THE HOUSING KIT. a.     Inspection.  (See figure 5-5.) (1)   Inspect  the  louvers,  door  panels,  and  front grille  for  cracks,  loose  mounting,  loose  or missing hardware, rust or corrosion. (2)   Inspect  the  weather  stripping  around  each door    assembly    for    peeling    of    adhesive backing, excessive wear, rot, or damage. (3)   Inspect all connectors in the wiring harness for  damaged  threads,  and  bent,  loose,  or missing   pins.      Check   all   connections   for security and condition.  Check all wiring for defective or worn insulation. WARNING Set  MAINTENANCE  LOCKOUT  switch  to LOCKOUT.      Disconnect   negative   cable from  batteries.    Remove  external  power by  opening  CB101  (120V  RECEPTACLE BREAKER).  Load terminals of generator set   circuit   breaker   (CB2)   may   still   be energized with the bus voltage. b.     Test.    Refer  to  FO-17  and  perform  a  continuity check    of    the    harness    assembly    using    an ohmmeter   between   connecting   points   in   the wiring harness.  Check for short circuits between connector pins of the same receptacle, plug, or terminal board. 5-21