TM 5-3895-374-24-1 INSTALLATION 1. Replace the  plastic  plugs  that  protect  the  threaded  holes in   the   reducer   housing   with   the   eyebolt   supplied   with   the reducer 2. Determine the running position of the reducer (See Fig 1) Note  that  the  reducer  is  supplied  with  either  4  or  7  plugs,  4 around  the  sides  for  horizontal  Installations  and  1  on  each face  for  vertical  Installations.  These  plugs  must  be  arranged relative to the running positions as follows: Horizontal Installations-Install the magnetic drain plug In the hole closest to the bottom of the reducer Throw away the tape that  covers  the  filler/ventilation  plug  in  shipment  and  install plug in topmost hole. Of the 3 remaining plugs on the sides of the  reducer,  the  lowest  one  Is  the  minimum  oil  level  plug  If output rpm is lower than 10, consult factory for oil level. Vertical   Installations-Install   the   filler/ventilation   plug   In   the hole provided in the top face of the reducer housing. Use the hole  in  the  bottom  face  for  the  magnetic  drain  plug  Of  the  5 remaining holes on the sides of the reducer, use a plug in the upper housing half for the minimum oil level plug. The    running    position    of    the    reducer    In    a    horizontal application is not limited to the four positions shown in Figure 1.  However,  If  running  position  is  over  200  either  way  from sketches, the oil level plug cannot be safely used to check the oil    level    unless    during    the    checking    the    torque    arm    IS disconnected  and  the  reducer  Is  swung  to  within  200  of  the positions  shown  In  Figure  1.  Because  of  the  many  possible positions  of  the  reducer,  it  may  be  necessary  or  desirable  to make   special   adaptions   using   the   lubrication   fitting   holes furnished  along  with  other  standard  pipe  fittings,  stand  pipes and oil level gages as required 3. Mount reducer on driven shaft as follows WARNING To  ensure  that  drive  is  not  unexpectedly  started,  turn off and lock out or tag power source before proceeding. Failure   to   observe   these   precautions   could   result   in bodily Injury. For Straight Bore: Mount reducer on driven shaft as close to bearing as  practical  If  bushings  are  used, assemble  bushing  in  reducer  first A  set  of  bushings  for  one  reducer consists of one keyseated bushing and     one plain bushing. Extra length     setscrews     are     furnished with    the     reducer.     Driven     shaft should  extend  through  full  length of    speed    reducer.    Tighten    both setscrews in each collar For Taper Bushed:  Mount  reducer  on  driven shaft    per    instruction    sheet    No 499629 packed with tapered bushings. 4. Install   sheave   on   Input   shaft   as   close   to   reducer   as practical (See Fig 2)  5.    Install  motor  and  V-belt  drive  so  belt pull  will  approximately  be  at  right  angles  to  the  center  line between  driven  and  input  shaft  (See  Fig  3).  This  will  permit tightening the V-belt drive with the torque arm. 6. Install   torque   arm   and   adapter   plates   using   the   long reducer bolts The bolts may be shifted to any of the holes on the input end of the reducer . 7. Install  torque  arm  fulcrum  on  a  rigid  support  so  that  the torque arm will be approximately at right angles ( + 300) to the center line through the driven shaft and the torque arm anchor screw (See Fig 4) Make sure that there is sufficient take-up in the  turnbuckle  for  belt  tension  adjustment  when  using  V-belt drive. LUBRICATION Caution: Reducer is shipped without oil Add the proper amount of oil before running. Use   a   high   grade   petroleum   base,   rust   and   oxidation inhibited  (R  &  O)  gear  oil-see  tables  Follow  instructions  on reducer    nameplate,    warning    tags,    and    in    the    Installation manual. Under average Industrial operating conditions, the lubricant should be changed every 2500 hours of operation or every   6   months,   whichever   occurs   first   Drain   reducer   and flush with kerosene, clean magnetic drain plug and refill to CAUTION Extreme pressure (EP) lubricants are not recommended for average operating conditions. proper level with new lubricant. Caution:  Too  much  oil  will  cause  overheating  and  too little will result in gear failure Check oil level regularly Under extreme operating conditions, such as rapid rise and fall of temperature, dust, dirt, chemical particles, chemical fumes, or oil sump temperatures above 2000F., the oil should be changed every 1 to 3 months depending on seventy of conditions. WARNING Do not use EP oils or oils containing slippery additives such    as    graphite    or    molybdenum    disulfide    in    the reducer  when  backstop  is  used.  These  additives  will destroy sprag action. (page 3-564)