2892442 - Introduction - POWER ASSISTED STEERING
STEERING CONTROL AND LINKAGE
The power assisted steering system consists of:
- the fluid reservoir in the engine compartment
- the vane pump, driven by the engine, including the maximum pressure and flow rate valve
- a series of pump-distributor valve-operating cylinder-reservoir connecting pipes
- a rack and pinion steering box with hydraulic power assistance
![](/image/schemes/fiat/2033147.png)
VANE PUMP
The vane pump is driven directly by the engine through a belt and is capable of providing the system with a supply pressure which varies from 3.5 bar in the "neutral" steering position to 85 bar in the "fully steered" position.![](/image/schemes/fiat/2033148.png)
POWER ASSISTED STEERING BOX
The power assisted steering box is the rack and pinion type; it contains an operating cylinder (2) in which a dual action piston (1), fixed to the rack rod, slides. The worm screw housing contains a distributor valve (3). The latter is controlled according to the effort detected by a torsion device (4) located at the end of the worm screw, steering column side.![](/image/schemes/fiat/2033149.png)