TM 10-3930-671-24 Place  the  metering  valve  assembly  into  its  bore  (Figure 5.16b).  Depress  and  rotate  the  valve  several  times  to ensure  freedom  of  movement.  If  valve  sticks,  rinse  off with  clean  calibrating  fluid.  Never  use  an  abrasive;  the special surface treatment provided will be damaged. FIGURE 5.16b. STEP   17   Depress   the   metering   valve   assembly   and install the guide stud and new guide stud washer into the housing and tighten (Figure 5.17a). FIGURE 5.17a. NOTE * Use grease sparingly as it can plug the return fitting   and   pump   will   not   bleed   air   from   housing during start-up. Pull   back   the   governor   linkage   hook,   stretching   the spring just enough to assemble the hook correctly to the fork  on  the  governor  arm.  Position  the  opposite  end  of the hook over the pin on the metering valve arm (Figure 5.17b).  Check  all  of  the  governor  parts  for  freedom  of movement. NOTE Do not twist spring. FIGURE 5.17b. Assemble    the    governor    spring,    spring    retainer,    idle spring    and    idle    spring    guide    on    the    bench    (Figure 5.17c).Apply a light film of grease to the parts in order to keep  them  in  place  while  assembling.  Install  the  spring components onto the guide stud as shown. FIGURE 5.17c. STEP  18  Install  new  Mylar  washers  and  seals  to  the throttle and shutoff shafts. Apply a light film of grease to each seal.* Assemble the throttle shaft assembly partially through  its  bore  in  the  housing.  Slide  the  throttle  shaft lever  over  the  throttle  shaft  so  that  the  projection  in  the throttle shaft lever bore engages the rear key way on the shaft. Position the forked end of the throttle lever so that it  straddles  the  guide  stud.  Assemble  the  shutoff  shaft assembly   with   a   slight   rotary   motion,   so   as   not   to damage  the  seal.  If  the  throttle  shaft  lever  is  correctly installed, rotating the throttle shaft assembly F-242