TM 9-2910-226-34 diametrically from the fuel pump end of the hub and is channeled to receive the ends of the three timing device springs (B). The new style hubs do not have a flange and are counterbored to receive the timing device springs. The springs oppose the flyweight forces of the weight and spider assembly (AH). c. The weight and spider assembly has external right hand helical splines to mesh with the internal helical splines of the sliding gear. The splined end is machined to receive the end play spacer (AE). Three flyweights are pinned to a flange adjacent to the splines. The weight and spider thrust plate (AG), located between the flange and the timing device housing, carries the back-thrust of the flyweights and prevents housing wear, d. The sliding gear has internal left hand helical splines at one end and internal right hand helical splines at the other end and meshes with the external splines of both the weight and spider assembly and the timing device hub. Correct assembly of the spline train is insured by a wide land on both the hub and weight and spider assembly. The sliding gear has a missing tooth on each set of internal splines to receive the wide lands. Three arms extend from the outer surface of the sliding gear and provide seats for the three timing device springs. The force on the springs is controlled by a sliding gear spacer (AF). 1-17. Fuel Density Compensator (Code F Injection Pump). NOTE The key letters shown below in parentheses refer to figure 1-15. a. The diaphragm housing (BB) is attached to the top of the governor housing and contains the stop plate (PP), guide (AA), inlet housing diaphragm (LL), and related parts. b. The fuel inlet housing (DD) attaches to the diaphragm housing and contains the fuel inlet port (JJ) and pressure regulator valve (HH). c. The pressure regulator valve (HH) is adjusted by the use of shims. This valve determines the inlet fuel pressure. d. The fuel outlet housing (EE) attaches to the fuel inlet housing and contains a fuel outlet port (GG) and an adjustable servo pressure valve (FF). The fuel outlet housing also has a recess for the servo spring (CC ). e. The servo pressure valve (FF) is adjusted during calibration of the density compensator to provide the correct fuel pressure drop across the inlet housing diaphragm (LL), establishing the stop plate (PP) travel. f. The stop plate guide (AA) provides adjustment of the fulcrum lever in the injection pump. g. The guide bears against the stop plate (PP) which, in turn, contacts the smoke limit cam (MM). The guide can be adjusted to move the stop plate laterally, thereby regulating travel of the governor fulcrum lever (NN). 1-18. Fuel Density Compensator (Code B, C, D and E Injection Pumps). NOTE The key letters shown below in parentheses refer to figure 1-16. a. The density compensator housing (BB), and gasket (Y) are attached to the top of the governor housing. b. The compensator housing cover (EE) and housing cover gasket (FF) enclose the servo spring (GG) and the servo pressure well. c. The pressure regulating valve (JJ) is adjusted by the use of shims. This valve determines the servo system inlet fuel pressure. d. The fuel outlet is through an elbow at the right front of the housing connected by a tube to the fuel injection pump overflow valve tee. e. The servo pressure valve (CC) is adjusted during calibration of the density compensator to provide the correct fuel pressure on the piston (H H ) and establish the travel of the stop plate (PP). f. The stop plate guide (AA) provides adjustment of the fulcrum lever in the injection pump. g. The guide bears against the stop plate (PP) which, in turn, contacts the smoke limit cam (MM). The guide can be adjusted to move the stop plate laterally, thereby regulating the travel of the governor fulcrum lever (NN). 1-19. Fuel Density Compensator (Code A Injection Pump). NOTE The key letters shown below in parentheses refer to figure 1-17. a. The density compensator housing (BB) and gasket (Y) are attached to the top of the governor housing. b. The compensator housing cover (EE) and housing cover gasket (FF) enclose the servo spring (GG) and the servo pressure well. c. The pressure regulating valve (JJ) is adjusted by the use of shims under the plug at the spring end of the valve. The valve determines the servo system inlet fuel pressure. d. The fuel outlet is through an elbow at the right front of the housing connected by a tube to the fuel injection pump overflow valve tee. e. The servo pressure valve (CC) is adjusted during calibration of the density compensator to provide the correct fuel pressure on the piston (HH) and establish the travel of the stop plate (PP). f. The stop plate guide (AA) provides adjustment of - the fulcrum - lever g. The guide bears (AK) and stop plate the smoke limit cam justed to move the regulating the travel (NN). in the injection pump. against the sliding stop weight (PP) which, in turn, contacts (MM). The guide can be ad- stop plate laterally, thereby of the governor fulcrum lever 1-24