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: injection-nozzle holder with hole-type nozzle and pintle-type nozzle air flow in a variable turbocharger two-spring injection-nozzle with needle-displacement sensor roller-cell pump