Cummings PT fuel system function of the gear wheel pump function of the PTG flyweight governor function of the VS governor function of the throttle shaft function of the VS throttle shaft function of the cut off solenoid valve description ordernumber 356 see also: common rail injector (with bottommounted solenoid valve) injection-nozzle holder with hole-type nozzle and pintle-type nozzle centrifugal governor of a DE (variable-speed governor) radiator cap