SAFARI

29 POWER STEERING piston. As soon as the hydraulic force (pressure difference X piston area) exceeds the spring force, the piston moves against the spring, with the result that the superfluous conveyed oil can pass into the inlet channel of the pump via the bypass bore which is then opened. Consequently, an almost constant oil flow is delivered for the steering unit over the entire speed range. The maximum pressure in the pump is controlled by a spring – loaded valve in the flow – limiting piston. Fig.13 Fig.13 Functional Representation of ZF Vane CP1 1. Housing 2. Shaft 3. Rotor 4. Vanes 5. Cam ring 6. Rear control 7. Front control 8. Suction duct 9. Pressure duct 10. Cover 11. Pressure relief valve 12. Flow control valve 13. Throttle insert