The necessary high pressure is generated by a 3-plunger radial-piston pump with the following features: compact construction, stainless steel housing with integrated quantity control valve, shut-off attenuator, fuel-lubricated, max. fuel pressure of 200 bar. The knurled screw can be used to drive the high-pressure pump and one sees how the pump pistons work. The eccentric shaft is guided on the drive side by a roller bearing and opposite by a plastic friction bearing (fuel-lubricated). Also cutaway: fuel return with shut-off attenuator, quantity control valve with magnetic coil and filter.