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Injectors And Rack Control Linkage (Type II)
Fuel Ratio Control

TM-5-3895-383-24
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TM 5-3895-383-24 View AA From Injectors And Rack Control Linkage (Previous) Illustration (1) Shaft.  (3) Clamp.  (7) Lever assembly.  (8) Synchronization screw.  (10) Rack.  (11) Injector. The  rack  control  linkage  connect  the  governor  output  to  fuel injector  (11)  at  each  cylinder.    The  governor  output  shaft  is pinned to link (4).  Link (4) is connected to lever assembly (6). When  the  governor  demands  more  fuel,  link  (4)  and  lever assembly (6) cause FUEL ON rotation of shaft (1) and clamps (3).  Each clamp then pushes lever assembly (7) as the shaft rotates.  Fuel Injector rack (10) is pulled by lever assembly (7), allowing more fuel to be injected into the cylinder. When the governor demands less fuel, link (4) causes shaft (1) and clamps (3) to rotate in the FUEL OFF direction.  Torsion spring   (2)   then   forces   lever   assembly   (7)   to   also   rotate clockwise,  pushing  injector  rack  (10)  toward  shutoff.    Torsion spring (2), at each lever assembly (7), allows the rack control linkage to go to shutoff, even if one injector rack is stuck open. Power setting of the No. 1 cylinder injector is made with fuel setting screw (5) in clamp assembly (9).  As fuel setting screw (5) is turned, shaft (1) rotates to a new position with respect to link  (4)  and  lever  assembly  (6).    Adjusting  screws  (8)  allow synchronization of the injectors to the injector of No. 1 cylinder. NOTICE Do   not   loosen   screws   holding   clamps   (3)   or   clamp assembly (9) to shaft (1).  These screws are factory set to the   shaft   (the   screws   can   be   identified   as   those   with socket  heads  filled  with  sealant).    Loosening  the  clamps will   cause   poor   engine   performance   and   may   cause damage to the engine. Governor The governor transfers the operator's requirements to the fuel injector   rack   control   linkage.      The   governor   receives   the desired   engine   speed   by   the   position   of   the   throttle.      The governor output shaft immediately moves when the throttle is moved.  The motion of the governor output shaft then causes the injector rack control linkage to rotate and move the injector racks.  As engine speed changes because of the rack change, the governor adjusts the amount of fuel delivered.  This causes the   engine   to   stabilize   at   the   speed   corresponding   to   the throttle position.  For further information refer to 3114, 3116 & 3126 Governor Service Manual, SENR6454. 6-13







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