TM 5-3895-374-24-2 FORM 741E S  u  r  e  -  F  l  e  x  ® C  o  u  p  l  i  n  g  s I  n  s  t  a  l  l  a  t  i  o  n     I  n  s  t  r  u  c  t  i  o  n  s Sure-Flex   flanges   (outer   metallic   parts)   and   sleeves (inner  elastomeric  members)  come  in  many  sizes  and types.  First, determine the size and type of components being  used.    Remove  all  components  from  their  boxes, and  loosely  assemble  the  coupling  on  any  convenient surface.    (Do  not  attempt  to  install  the  wire  ring  on  the two-piece   E   or   N   sleeve   at   this   time.)   Also   check maximum   RPM   values   in   Table   2   against   operating speed.    All  rubber  sleeves  (EPDM  and  Neoprene)  have the   same   ratings   for   a   given   size   and   may   be   used interchangeably.    However,  because  rubber  and  Hytrel sleeves   have   completely   different   ratings,   they   never should be used interchangeably. 1    Inspect   all   coupling   components   and   remove   any protective   coatings   or   lubricants   from   bores,   mating surfaces and fasteners.  Remove any existing burrs, etc. from the shafts. 2  Slide one coupling flange onto each shaft, using snug- fitting  keys  where  required.    With  the  Type  B  flange,  it may   be   necessary   to   expand   the   bore   by   wedging   a screwdriver into the saw cut of the bushing. 3    Position  the  flanges  on  the  shafts  to  approximately achieve the G1 dimension shgwn in Table 2.  It is usually best to have an equal length of shaft extending into each flange.  Tighten one flange in its final position.  Refer to Table;  1  for  fastener  torque  values.    Slide  the  other  far enough  away  to  install  the  sleeve.    With   a   two-piece sleeve,  do  not  move  the  wire  ring  to  its  final  position; allow  it  to  hang  loosely  in  the  groove  adjacent  to  the teeth, as shown. 4   Slide the losse flange on the shaft until the sleeve is completely seated in the teeth of each flange, (The "G1" dimension  is  for  reference  and  not  critical.)  Secure  the flange to the shaft using the torque values from Table 1. TABLE 1 - FASTENER TORQUE VALUES (ft.-lbs.) TYPE J TYPE S TYPE B TYPE SC* TYPE C 4Hex Head 1Setscrew 1Setscrew Coupling 2Setscrews 2Setscrews 3Hex Head Cap Screws over Keyway Clamping over Size at 90 at 90 Cap Screws Flange t o Hub in Hub Screws Keyway 3 3 ... ... ... ... ... ... 4 3 ... ... 5 ½** 13 ... ... 5 7 13 ... 4 13 ... ... 6 13 13 5 9 13 15 13 7 13 13 5 9 13 30 13 8 23 23 9 18 23 55 13 9 ... 23 9 31 23 55 13 10 ... 23 15 50 50 130 13 11   · 23 30 75 50 130 13 12 ... 50 60 150 100 250 13 13 ... 100 75 150 165 ... ... 14 ... 100 75 150 165 ... ... 16 ... 100 135 150 165 ... ... *Torque values app!y to hub size when different than flange size. **Value for socket head clamping screw. page 3 - 869