cylinder housing sleeve 40 corresponding to the sleeve 28 shown in fig4 the injection pump assembly of fig1 includes a pumping chamber 42 defined by reciprocating plunger 44 and plunger cylinder or bore 46 the lower end of the plunger 44 is connected to a spring shoulder 48 received in a spring cage 50 a spring 52 is seated on follower spring seat 54 formed on injector body 38 the plunger normally is urged in a downward direction as viewed in fig1 by the spring 52 the spring cage 50 carries cam follower 56 which corresponds to the cam follower 16 of fig4 spring cage 50 is received in sleeve 58 extending from the lower portion of the injector body 38 a valve chamber 60 is transversely disposed in the injector body 38 its axis being perpendicular to the axis of the plunger a control valve 62 is situated in the valve chamber 60 an annular groove 64 on the control valve 62 communicates with high pressure passage 66 extending from pumping chamber 42 the passage 66 communicates with outlet fitting 68 which in turn communicates with a high pressure passage corresponding to passage 30 of fig4 and with an injector nozzle a solenoid actuator generally indicated at 70 includes an armature 72 which is connected to the right end of the valve 62 the armature is actuated by a solenoid assembly not visible in fig1 the valve 62 is urged normally in a left hand direction as viewed in fig1 by valve spring 74 spring 74 is seated on shoulder element 76 carried by valve 62 valve 62 is spring loaded normally in a left hand direction against valve stop 78 received in.