TM 5-3895-374-24-1 IMPORTANT: Using tools normally found In a maintenance department, a  Dodge  Torque-Arm  Speed  Reducer  can  be  disassembled and    reassembled    by    careful    attention    to    the    instructions following. Cleanliness Is very important to prevent the introduction of dirt into the bearings and other parts of the reducer. A tank of clean   solvent,   an   arbor   press,   and   equipment   for   heating bearings  and  gears,  should  be  available  for  shrinking  these parts on shafts. Our  factory  Is  prepared  to  repair  reducers  for  customers who do not have proper facilities or who for any reason desire factory service. The  oil  seals  are  of  the  rubbing  type  and  considerable care should be exercised during disassembly and re-assembly to avoid damage to surfaces which the seals rub on. The keyseat In the input shaft as well as any sharp edges on the output hub should be covered with tape or paper before disassembly  or  re-assembly.  Also  be  careful  to  remove  any burrs  or  nicks  on  surfaces  of  the  input  shaft  or  output  hub before disassembly or re-assembly. ORDERING PARTS: When   ordering   parts   for   reducer   specify   reducer   size number,  reducer  serial  number,  part  name,  part  number  and quantity. It Is strongly recommended that when a pinion or gear is replaced,  the  mating  gear  or  pinion  also  be  replaced  if  the large    gear    on    the    output    hub    must    be    replaced,    it    is recommended    that    an    output    hub    assembly    of    a    gear assembled    on    a    hub    be    ordered    to    secure    undamaged surfaces on the output hub where the oil seals rub. However, if It  is  desired  to  use  the  old  output  hub,  press  the  gear  and bearing off and examine the rubbing surface under the oil seal carefully   for   possible   scratching   or   other   damage   resulting from  the  pressing  operation.  To  prevent  oil  leakage  at  the  oil seals,   the   smooth   surface   of   the   output   hub   must   not   be damaged. If  any  parts  must  be  pressed  from  a  shaft  or  from  the output hub, this should be done before ordering parts to make sure that none of the bearings or other parts  are  damaged  in removal Do not press against outer race of any bearing. Because    old    shaft     oil     seals     may     be     damaged     In disassembly  it  is  advisable  to  order  replacements  for  these parts. REMOVING REDUCER FROM SHAFT: WARNING:    Remove    all    external    loads    from    drive before removing or servicing drive or accessories 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. STRAIGHT BORE: Loosen  screws  In  both  output  hub  collars.  Remove  the collar  next  to  end  of  shaft.  This  exposes  three  puller  holes  in output hub to permit use of wheel puller. In removing reducer from shaft be careful not to damage ends of hub. TAPER BUSHED: 1. Remove bushing screws 2. Place  the  screws  in  the  threaded  holes  provided  in  the bushing flanges Tighten the screws alternately and evenly until the   bushings   are   free   on   the   shaft   For   ease   of   tightening screws   make   sure   screw   threads   and   threaded   holes   in bushing flanges are clean. 3. Remove  the  outside  bushing,  the  reducer  and  then  the Inboard bushing. DISASSEMBLY: 1, Remove retaining rings from output hub Remove bushing back-up plates. 2. Remove  all  bolts  from  housing  Open  housing  evenly  to prevent damage to parts inside. 3. Lift shaft, gear, and bearing assemblies from housing. 4. Remove   seals,   bearing   covers,   seal   carriers,   backstop carrier and bearing cups from housing. REASSEMBLY: 1.     Output  Hub  Assembly:  Heat  gear  to  325°F  to  350°F  to shrink  onto  hub.  Heat  bearing  cones  to  270°F  to  290°F  to shrink onto hub.  Any Injury to the hub surfaces where the oil seals rub will cause leakage, making it necessary to use a new hub. 2. Countershaft Assembly: Heat gear to 325°F to 350°F and bearing cones to 270°F to 290°F to shrink on shaft. 3. Input  Shaft  Assembly:  Heat  bearing  cones  to  270°F  to 290°F to shrink on shaft. 4. Place  a  010"  shim  on  output  hub  seal  carrier,  counter- shaft cover and backstop carrier for right hand half of housing (as viewed in drawing). Place a 1/8" dia. bead of Dow Corning RTV732 sealant on the face around the I D of the shim (seal Is to  be  between  reducer  housing  and  shim).  Install  right-hand carriers and cover in housing half and torque screws to torque values  in  Table  3  Place  bearing  cups  in  right-hand  housing half. Make certain the cups are properly seated In housing and are pressed against carriers and cover. Place housing half on blocks to allow for protruding end of output hub. CAUTION:  If  too  much  sealant  is  used  It  will  run  into bearing and too little sealant will result in an Ineffective seal 5. Mesh  output  hub  assembly  and  countershaft  assemblies together and place in housing half Place input shaft assembly In housing half Tap lightly with a soft hammer (rawhide not a lead   hammer)   until   bearings   are   properly   seated   In   the housing. (page 3-568)