TM 10-3930-671-24 STEP 9 Insert the transfer pump liner so that the slot is in line with the hole which the regulator assembly rollpin enters (Figure 5.9a). FIGURE 5.9a. Assemble   springs   to   transfer   pump   blade   halves   and install the blades in their slots in the rotor (Figure 5.9b). The blade springs must be fully compressed as they are installed and care should be taken not to cock the blades during  installation,  as  the  sharp  edge  of  the  liner  can score the blade ends. NOTE A number of rotors have oversized blade slots (.001 in.  [.0254mm]  wider  than  normal).  Oversized  blade should   always   be   tried   first   when   assembling   a pump.  If  oversized  blades  fit  any  of  the  slots,  they should  be  used  in  those  slots.  It  is  permissible  to use  both  oversize  and  standard  size  blades  in  the same rotor. FIGURE 5.9b. STEP     10     Assemble     the     transfer     pump     regulator components  (Figure  5.10a).  Install  the  inlet  filter  screen seal  on  the  regulator.  Using  regulating  sleeve  adapter, place the regulating piston seal in the groove  of  the  regulator. Do not roll the seal over when assembling. NOTE Some   DB2   models   no   longer   use   this   seal,   but instead have a bushing pressed into the regulator in its  place.  This  bushing  should  not  be  removed  and, when present, no seal is required. Install  the  piston  to  the  regulator  with  the  hollow  end facing the spring or the threaded end of the bore. Install the    regulating    spring    and    adjusting    plug.    This    plug contains  the  viscosity  compensating  orifice  and  should be installed so that the top of the screw is flush with the end  of  the  regulator  assembly.  Using  regulating  sleeve adapter,   check   the   regulating   piston   for   freedom   of movement in its bore. Turn the adjusting plug in until it is flush with end of regulator so damage to the pump will not result from excessive transfer pump pressure when the pump is operated. FIGURE 5.10a. Assemble    the    regulator    to    the    liner    (Figure    5.10b). Check that the liner locating pin is in  the  correct  hole  in the regulator for proper pump rotation. On the face of the regulator    "C"    or    "CC"    is    stamped    for    clockwise    or counterclockwise pump rotation. F-238