TM 9-4940-342-14&P cylinders are properly positioned in the recesses top and bottom. (p)  Retighten    cap    screws    alternately    and evenly until the parts are snugly seated. (4)  Servicing the pump valves. (a)  Remove   the   cap   screw   and   clamp   bar from  the  rear  of  the  valve  chamber  and  lift  out  the valve covers and O-rings attached. (b)  Remove  the  discharge  valve  springs  and seat assemblies and valve cages. (c)  Insert the round end of a valve seat puller thru the opening at the center of the valve seats and loosen seats from the valve chamber with a rocking motion of the tool. (d)  Remove the valve seats from the recesses with opposite end (curved end) of tool. (e)  Repeat the four preceding steps to remove the  suction  valve  parts  which  are  identical  to  the discharge  valve  parts  and  are  located  immediately under them in the valve chamber. (f)  Clean all parts and inspect them. Replace all worn parts as needed. (5)  Reassembling the value parts. NOTE Valve seats may be used either side up, thus, if one side  shows  wear,  the  opposite  side  may  be  used  to provide a new seat. (a)  With  the  O-ring  in  place  on  each  valve seat,  place  a  few  drops  of  light  oil  on  the  ring  and seat. Place each squarely in the bottom of the recess in the valve chamber. (b)  Place  the  valve  cages  on  the  valve  seats and the springs and disk assemblies inside each cage. (c)  Repeat  steps   (a)   and   (b)   to   install   the outer discharge valve parts. (d)  Place  the  valve  covers  (with  O-rings  on bottom groove) over each valve assembly. (e)  Replace    clamp    bar    and    cap    screw. Tighten the cap screw only snugly as over-tightening can  damage  valve  parts.  Use  12  to  15  foot-pounds torque. (6)  Servicing the crankshaft. (a)  Remove   pipe   plug   and   drain   oil   from pump case. (b)  Disconnect piping and remove pump from base. (c)  Remove   cap   screws,   cup   washers   and mounting base carefully to protect gasket. (d)  Remove  cap  screws  from  the  connecting rod assemblies. Use a center punch or other suitable instrument    to    mark    caps    and    rods    for    proper rematching when they are reassembled. (e)  Remove oil slinger from the crankshaft. (f)  Push the connecting rods and crosshead 46 assemblies    into    the    pump    case    to    clear    the crankshaft. (g)  Remove   the   driven   sheave   from   the crankshaft extension. (h)  Remove snaprings. (i)   Place a wood block against either end of the  crankshaft  and  drive  the  shaft  from  the  pump case. CAUTION Never pound directly on bearings when removing or  replacing  them  on  the  crankshaft.  A  block  of wood,   with   a   suitable   sized   opening   or   block supports    to    assure    reasonable    equal    support around  the  bearing,  in  a  press  is  best  for  this important work. (j)   After inspecting and replacing all worn parts,  press  new  bearing  (if  needed)  against  the shoulders on the crankshaft. (k)  With the crankshaft and bearing assemblies in place in the pump case, place the oil seals,  carefully,  over  the  ends  of  the  crankshaft with  the  lip  of  the  seals  facing  the  inside  of  the pump case. (l)   Seat   the   snaprings   in   grooves   in   the bearing  housings  against  the  oil  seals  and  tap  the crankshaft   to   allow   a   slight   end   play   in   the crankshaft. (m)Reassemble   the   connecting   rods   and crosshead,  being  sure  to  rematch  the  rod  and  cap properly as marked when disassembled. (n)  Complete  the  reassembly  by  reversing steps  (a)  through  (h),  being  sure  to  replace  drain plug. (o)  Remove    ¾"    fill    plug    and    fill    the crankcase  with  clean  SAE  20  non-detergent  oil  to the filler plug level. (p)  Turn   the   pump   a   few   revolutions   by hand to be sure all parts are running freely before using the pump. (7)  Servicing the crossheads. (a)  Remove   the   valve   chamber,   cylinders and plunger packings as described in paragraph (3), servicing the plunger packings, steps (a) and (b). (b)  Remove   O-ring   seal,   back-up   washer and the crosshead umbrellas. (c)  Remove   the   mounting   base   and   the connecting   rods   as   described   in   paragraph   (6), servicing the crankshaft, steps (a) through (d). (d)  Turn  the  crankshaft  by  hand  to  allow removal of the crossheads, being sure that all parts are reassembled in the exact former position. (e)  Reverse   steps   (a)   through   (c)   when reassembling  the  crossheads,  being  sure  that  all