TM 5-3805-260-24 The  flexible  cables  from  the  control  levers,  for  bowl DOWN  or  UP,  for  ejector  RETURN  or  EJECT,  connect to the valve spools in the control valve. Relief valve (I), in the  control  valve,  is  in  the  oil  circuit  from  the  pump  to either the bowl I or the ejector and door cylinders. When the bowl lift lever is in the HOLD position, bowl valve spool (6) is in HOLD position (B). The oil from the pump goes through the control valve, through outlet (12) and to the tank. Move   the   lift   lever   to   the   DOWN   position   and   it moves bowl valve spool (6) to DOWN position (C).  Now, the oil  from  the  pump  goes  out  opening  (2)  to  the  head ends  of  the  bowl  cylinders.  The  pump  oil  in  the  head ends   pushes   the   pistons   and   rods,   connected   to   the bowl, and the bowl goes down. CARRY CHECK VALVE 15. Fitting (for vent line to control valve). 16. Oil line opening In valve body. As  the  pistons  in  the  bowl  cylinders  go  down,  they push  the  oil  from  the  rod  ends  through  opening  (17). The  oil  pushes  check  valve  (18)  open  and  then  goes through opening (16) and the oil line to the control valve opening  (4).  The  rod  end  oil  goes.  through  the  control valve and through outlet (I1) to the tank. 15. Fitting (for vent line to control valve). 16. Oil line opening. 17. Opening (to the rod end of the cylinder). 18. Check valve. The rod end oil  from  the  bowl  cylinder  opens  check valve  (18)  only  when  bowl  valve  spool  (6)  is  in  DOWN position  (C).  Hole  (7),  in  the  valve  spool,  is  in  passage (8)  with  the  valve  spool  in  HOLD  position.  Oil  from  the spring  chamber  in  check  valve  (18)  is  pushed  through fitting  (15)  and  the  oil  line  into  passage  (8).  The  oil  in passage (8) goes through hole (7), through the passage in the center of the valve spool and out hole (5) into the oil that goes through outlet (I ) to the tank. Move  the  bowl  lift  lever  to  the  UP  position  and  it moves bowl valve spool (6) to UP position (A). Now, the oil  from  the  pump  in  the  control  valve  goes  out  through opening  (4),  through  the  oil  line  into  opening  (16)  in  the carry check valve. The pump oil opens check valve (18) and  goes  through  opening  (17)  into  the  rod  ends  of  the bowl cylinders. The pump oil in the rod ends pushes the pistons  and  rods,  connected  to  the  bowl,  and  the  bowl goes up. The  pump  oil  through  opening  (16)  pushes  on  the step surface of check valve (18) to open  the  valve.  The pump  oil  opens  the  check  valve  because,  when  bowl valve  spool  (6)  is  in  UP  position  (A),  hole  (9)  is  then  in passage  (8)  and  the  oil  in  the  spring  chamber  of  check valve  (18)  goes  through  fitting  (15),  the  oil  line  and  into passage (8). The oil in passage (8) goes through hole (9) out  of  hole  (5)  and  into  the  oil  that  goes  through  outlet (11) to the tank. The HOLD position (B) for valve spool (6) stops the oil in passage (8), in the oil line and fitting (15) and in the spring chamber of check valve (18). The oil from the rod ends  of  the  bowl  cylinders  in  opening  (16),  of  the  carry check  valves,  can  not  open  the  check  valves  and  this keeps the bowl up until the bowl lift lever is moved. Control Valve (Ejector Circuit) Hold   the   ejector-floor   lever   in   the   OPEN-EJECT position and it moves ejector valve spool ( 13) to EJECT position (D). The pump oil through inlet (3) goes through the control valve, out through opening (12) to the rod end of  the  door  cylinder  and  also  to  the  head  end  of  the ejector   cylinder.   The   pump   oil   in   both   cylinders   first moves  the  piston   and   rod,   connected   to   the   door,   to open   the   door.   The   door   cylinder   piston   moves   first because it has a larger diameter than the ejector cylinder piston.   The   pump   oil   in   the   head   end   of   the   ejector cylinder   moves   the   piston   and   rod,   connected   to   the ejector, to move the ejector forward. The pump oil in the rod end of the door cylinder can move the piston, which moves the oil from the head end, because pump oil in the line through opening (17) moves check valve (19) down and the check valve is open. With the check valve open, the oil pushed from 4-22