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ARMY TM 9-2815-256-24 AIR FORCE TO 38G1-96-2 MARINE CORPS TM 2815-24/5 FIGURE 3-78.  Removing Advance Screw Hole Plug af. Remove piston hole plug (58, FIGURE 3-64), advanced adjustment guide (61), spring (59), piston spring (60), power piston (68), piston ring (69), and seal from under piston ring (70), refer to FIGURE 3-79. FIGURE 3-79.  Removing Spring Side Advance Plug ag. Remove two preformed packings (62 and 63, FIGURE 3-64) from piston hole plug (58). ah. If necessary, remove set nut (66), piston seal ring (65), and piston spring adjusting screw (64). ai. Remove piston hole plug (67), two preformed packings (74 and 75) from piston hole plug (67), reed valve (73) and two reed valve screws (72). aj. Return  pump  and  holding  fixture  as  unit  to  its  initial  position  in  vise  with  rear  of  hydraulic  head  tilted  slightly downward. ak. Remove two locking head screws (53, FIGURE 3-64). al. Remove  hydraulic  head  assembly  (17,  FIGURE  3-73)  by  grasping  with  both  hands  and  withdrawing  it  with  a slight rotary motion. NOTE When hydraulic head assembly (17, FIGURE 3-73) is inverted, weight (18), sleeve (19), and thrust washer (20) will fall out. 3-98


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