SAFARI

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