TM 10-3930-671-24 STEP 28 Support the  rotor  in  the  rotor  support  tool  and use  a  socket  head  wrench  to  remove  the  delivery  valve stop screw. The delivery valve stop and spring may now be   removed   (Figure   3.28).   Discard   the   delivery   valve stop.  If  the  delivery  valve  does  not  slide  freely  from  its bore, use extractor to remove it. STEP  29  To  remove  the  arm  from  the  metering  valve, place the metering valve in one of the holes provided in the  top  of  the  fixture  19965.  Use  a  soft-faced  mallet  to tap the arm off of the valve (Figure 3.29). FIGURE 3.29. NOTE Older   style   mounting   plates   may   not   have   holes drilled   in   the   top   for   Inserting   and   removing   the metering valve arm. Modify  the  mounting  plate  by  drilling  two  holes,  17/64’ (6.75mm) and 21/64" (8.33mm) as shown. FIGURE 3.28. F-231