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
36 - 8
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
36 - 9
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
36 - 10
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
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