Renault /Dacia Sandero cars are fitted with steering gear-rack type steering gear

Basically, cars are equipped with power steering.

The steering drive consists of two steering rods connected by ball joints to the levers of the front suspension rotary fists.

Renault /Dacia Sandero steering features

The steering mechanism is mounted on the front suspension subframe and secured to it with two bolts.

In the crankcase of the steering mechanism, the rack is pressed to the gear shaft by a spring through the stop.

The adjustment of the lateral gap between the gear and the rail is performed by rotating the adjusting plug, which presses the spring.

The adjustment is carried out during the assembly of the steering mechanism at the factory.

The steering drive consists of two steering rods connected to the steering rack and steering knuckle levers.

Each rod is attached with the inner end to the steering rack through a non-removable ball joint — the threaded tip of the hinge is screwed into the opening of the rack.

In the middle part of the steering rod, a turnkey hexagon "on 13" is made, and at the outer end there is a thread on which the tip of the rod is screwed.

There is a non-removable ball joint in the tip of the steering rod, which does not require replenishing the supply of lubricant embedded inside it for the entire service life.

The right and left steering rods are the same, and the tips are different.

The connection of the steering rack and the steering rod ball joint is protected from dirt and moisture by a corrugated rubber cover.

The cover is fixed with a steel disposable yoke on the crankcase of the steering mechanism, and on the steering rod the cover is held by a spring yoke — at the same time, the narrow belt of the cover must coincide with the groove made on the steering rod.

The steering column shaft is attached to the steering gear shaft through an intermediate shaft with two cardan joints.

A steering wheel is mounted on the slots in the upper part of the steering column shaft, secured with a screw.

The steering column is attached to the crossbeam bracket located under the instrument panel.

The power steering system includes: a steering mechanism, a pump, a radiator for cooling the working fluid, a tank for the working fluid and connecting pipes of the mains.

The pump is driven by a belt from the drive pulley of the auxiliary units.

Hydraulic fluid from the tank enters the pump, and from it is supplied under high pressure to a switchgear located in the crankcase of the steering mechanism and mechanically connected to the shaft of the steering column.

The piston of the hydraulic cylinder is fixed on the gear rack of the steering mechanism.

When the steering wheel is turned, the switchgear connects one of the hydraulic cylinder chambers to the pump discharge line, and the other chamber to the drain.

At the same time, the piston of the hydraulic cylinder, due to the difference in the pressure of the working fluid, moves the rail to the left or right and through the steering rods and the fist levers turns the steering wheels of the car.

In case of failure of the hydraulic booster, the ability to control the car is preserved, but at the same time the force on the steering wheel increases.

Possible steering malfunctions and solutions

- The cause of the malfunction

Method of elimination

Increased steering wheel freewheel and steering knocks:

- Loosening of the tightening bolts of the steering mechanism

Tighten the bolts

- Wear of steering rod ball joints

Replace the hinges

- Wear of the steering shaft gimbal joint

Replace the steering shaft

Difficult steering wheel rotation:

- Slipping of the belt drive of the pump GUR

Replace the belt

- Damage to the pump drive belt

Replace the belt

- Insufficient working fluid level

Restore the level to normal

- Air entering the hydraulic system

Remove the air

- Twisting or damage of hoses

Eliminate twisting or replace hoses

- Insufficient pressure of the GUR pump

Replace the pump

- Increased internal leaks in the pump

Replace the pump

- Fluid leaks from the steering gear

Replace defective parts

Fuzzy steering wheel return to the middle position:

- Difficult turning of internal hinges or steering rod tip hinges

Replace the steering rod tips

- Deformation of the steering rack

Replace the steering gear

- Gear bearing damage

Replace the steering gear

- Twisting or damage of GUR hoses

Eliminate twisting or replace hoses

- Damage to the pressure control valve

Replace the pressure control valve

- Damage to the pump rotor roller bearing

Replace the pump

Steering noise:

- Loosening of the tightening bolts of the steering mechanism

Tighten the bolts

- Loosening the fastening of steering rods or ball joints of rod tips

Tighten the nuts

- Wear of ball joints

Replace worn parts

Increased noise of the hydraulic booster pump:

- Insufficient working fluid level

Restore the fluid level to normal

- Air entering the hydraulic system

Remove the air

- Loosening the tightening of the pump mounting bolts

Tighten the bolts

Steering check

When operating the car, it is necessary to regularly check the condition of the steering

During the inspection, special attention should be paid to the condition of the protective covers and threaded connections.

Torn, cracked rubber covers must be replaced, otherwise water, dust and dirt trapped in the nodes will quickly disable the nodes.

On vehicles with GUR, it is necessary to check the condition of pipelines and hoses.

Turning the steering wheel from stop to stop, you need to check by ear:

- reliability of the steering mechanism and steering wheel attachment;

- no gap in the steering rod bushings and ball joints of the steering rod tips;

- reliability of tightening and locking of steering rod joints and ball joint finger nuts;

- absence of jamming and interference that prevent steering.

Steering checkSteering check

Check the condition of the protective covers of the steering rod tips

Replace the torn, cracked covers

Turning the steering wheel sharply in both directions, we check (with the help of an assistant) visually and audibly the fastening of the steering mechanism

Steering checkSteering check

Movement on the fastening bolts (arrows in the figure) of the mechanism and knocks are not allowed.

You also need to check for backlash in the ball joints of the steering rod tips.

Tips, hinges that have a noticeable backlash need to be replaced

Check the free running of the steering wheel

To do this, you will need: a ruler, chalk, or wire for marking

Setting the front wheels to the position corresponding to the forward movement

Steering check

We install the ruler so that its end rests against the instrument panel, and the plane of the ruler touches the outer surface of the steering wheel rim.

Without changing the position of the ruler, turn the steering wheel to the right until the front wheels start turning. In this position, you need to put a mark on the steering wheel rim (or fix a wire or plastic clamp)

Without changing the position of the ruler, turn the steering wheel to the left until the front wheels start turning.

In this position, we put a second mark on the steering wheel rim

Steering check

We measure the distance between the labels along the rim. It should be no more than the calculated value.

If the free travel distance of the steering wheel is greater, it is necessary to find the cause and eliminate it.

The backlash should not exceed 5°

For a steering wheel with an outer diameter of 360 mm, the backlash should not exceed 15-17 mm.