TM 5-3805-260-24CROSS SECTION OF FUEL SYSTEM WITH DASHPOT GOVERNOR11. Fuel transfer pump.13. Camshaft14. Housing for fuel Injection pumps.15. Lever.16. Governor housing 17.Load stop pin 18. Cover.19. Sleeve control shafts (two)20. Inside fuel passage.21Drive gear for fueltransfer pump22. Lever on governor shaft.23. Piston for dashpot governor 24. Spring for dashpot governor25. Governor springs (inner spring Is for low idle. Outer spring Is for high idle).26. Spring seat27.Over fueling spring.28. Thrust collar29. Load stop lever.30. Carrier and governor weights. 31 Sleeve levers. E.Orifice for dashpot.From fuel transfer pump (I 1), fuel under pressure,fills the housing for the fuel injection pumps (14).Pressure of the fuel in housing (14) is controlled bybypass valve (12). Pressure of the fuel at FULL LOAD is30 + 5 psi (205 + 35 kPa). If the pressure of the fuel inhousing (14) gets too high, bypass valve (12) will move(open) to let some of the fuel return to the inlet of fueltransfer pump (II).Lever (15) for the governor is connected by linkageand governor springs (25) to the sleeve control shafts(19). Any movement of lever (22) will cause a change inthe position of sleeve control shafts (19).When lever (15) is moved to give more fuel to theengine, lever (22) will put governor springs (25)in compression and move thrust collar (’28) forward. Asthrust collar (28) moves forward, the connecting linkagewill cause sleeve control shafts t19) to turn. With thismovement of the sleeve control shafts, levers (31) willlift sleeves (32) to make an increase in the amount offuel sent to the engine cylinders.When starting the engine, the force of over fuelingspring (27) is enough to push thrust collar (28) to the fullfuel position. This lets the engine have the maximumamount of fuel for injection when starting. Atapproximately 400 rpm, governor weights (30) makeenough force to push spring (27) together. Thrust collar(28) and spring seat (26) come into contact. From thistime on, the governor works to control the speed of theengine.2-8
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