Dacia Solenza (engine E7J). Manual - part 85

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STEERING ASSEMBLY

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General

CONSTANT POWER STEERING (CPS)

1. Power steering pump
2. Power steering box
3. High pressure piping
4. Low pressure piping
5. Oil reservoir
6. Rotary valve
7. Pressure controller
8. Accessories belt
9. Rigid ducts

10. Steering box working

chambers

The working principle of the Constant Power Steering (CPS) system, consists in steering

hydraulic assistance by hydraulic fluid (oil) passing through a drawer (the two chambers (10)
from steering box) with double effect and through a rotary valve (6) that is distributing the fluid
through two pipes (9) towards the steering box (2) subject to the full turning direction of the
directing wheels.

The hydraulic assistance is ensured by a pressure controller (7) attached on  the  high  pressure

pipe (3) and connected to the injection computer.

The injection computer is receiving information, during power steering operation, about the

pressure value in “high pressure circuit” ( which may be seen by means of the CLIP tester). The
pressure value in “high pressure circuit” is depending of the pomp conducted pressure as well as
of the used oil fluidity.

The more pressure is high, the power steering pump is absorbing more additional energy.
The power steering pump (1) is continuously providing in the circuit a constant hydraulic fluid

(oil) flow, regardless the engine RPM, based on the fact that pump is driven by the accessories
belt (8). In this case, the system  has the generic denomination of “ Open Center System “

REMARK:
The steering is not to be fully locked at maximum more than 45 seconds at an engine

RPM of 2500 rot/min (risk of power steering pump damaging).

36054

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STEERING ASSEMBLY

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SPECIAL TOOLS

MOT 453

Flexible piping pliers

P.F. 476

Device for ball joint depressing

TIGHTENING MOMENTS  (daNm)

Power steering box

DA-CA supply pipe attachment screw on power train

0.4

Attachment screw of steering box high pressure pipe-pump

2.1

Wheels screws

9

Steering ball joint nut

4

Steering box attachment screws on cross-member

5

Screws for pipes clamps attachment on power train

0.77

Screws for clamps attachment on steering box supports

3

Connection screws of the steering column lower shaft joint

1.4

DISMOUNTING

Dismount the battery.
Lift the vehicle by means of a two-column

elevator.

PF 476

Dismount:

- engine shield;
- steering rods funnels ball joints by means

of the PF 476 device;

- connection screw between the steering

column lower shaft joint and the  steering box gear
shaft, marking the joint position.

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STEERING ASSEMBLY

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Clamp the two flexible pipes ( supply and

low pressure) by means of the MOT 453
device.

Dismount :

- clamps attachment for maintaining the

low pressure pipe;

- connections of the high and low

pressure from the steering box;

- low pressure piping (maintaining clip being

previously dismounted);

Disconnect the oxygen sensor, in case of

vehicles equipped according to EURO III
norms.

- exhaust central collar; (under vehicle);
- anti-rocking steering rod from the

cross member  support and from the gearbox:

Power steering box

Push the descending tube towards vehicle

front.

Dismount the four steering box attachment

screws on the cross member.

Remove the steering box through the right

side (distribution side).

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STEERING ASSEMBLY

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REMARK :
It is forbidden to dismount from the power

steering box the pipes between the rotary
valve and the steering box.

When dismounting, the high and low

pressure pipes are to be positioned with the
connection screws downward oriented, in
order to avoid contaminants penetration.

REMOUNTING

Mount :

- steering box
- steering rods ball joints in the steering

knuckle arms;

- exhaust
- anti-rocking steering rod;
- cardan joint in the position marked at

dismounting;

- high and low pressure pipes (remove

MOT  453  pliers), observing the required
tightening moments;

- piping attachment collars;
- wheels;
- battery.

Refill the circuit with oil ( full reservoir).

With stopped engine, easy act upon the

steering wheel in both directions, so that rack
is performing a complete double stroke.

Repeat the operation with started engine

(oil pump operating), then fill up to the MAXI
mark, the oil level in the reservoir.

Check and eventually adjust the

parallelism.

Power steering box