2005 Citroen C4 valve

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AXLES
SUSPENSION
STEERING
C4TIGHTENING TORQUES: POWER-ASSISTED STEERING
Steering column
Ref. Description Tightening
1Fixed central controls steering wheel screw2,2 ± 0,2
2Steering column interface nuts
3Upper nuts
4Lower nuts
5Fixing of steering cardan on valve stem
Steering mechanism with integral ram
Ref. Description Tightening
6Union of hydraulic pipe on ram0,8 ± 0,1
7Fixing of distributor valve on steering mechanism1,5 ± 0,1
8Fixing of bracket on distributor valve2 ± 0,2
9Union of hydraulic pipe on distributor valve0,8 ± 0,1
10Steering ball-joint nut3,5 ± 0,3
11Locking nut for adjustment of steering track rods5,5 ± 0,5
12Fixing of ball-joint on steering rack7 ± 0,7
13Stud on steering mechanism0,8 ± 0,1
14Nut fixing mechanism on subframe8 ± 0,8
B3EP177D
B3EP176D
2,2 ± 0,2
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AXLES
SUSPENSION
STEERING
C4TIGHTENING TORQUES: POWER-ASSISTED STEERING
Steering assistance electrovalve
Ref. Description Tightening
15Fixing of electrovalve on chassis member2,3 ± 0,2
16Screw fixing bracket on electrovalve2 ± 0,2
17Fixing of electrovalve on chassis member2,2 ± 0,2
B3EP178D
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AXLES
SUSPENSION
STEERING
C4CHECKING THE POWER STEERING ASSISTANCE PRESSURE
Tools.
[1]Pressure gauge: (-).0710.AZ
[2]Checking tube: pressure gauge to tap: (-).0710.B1
[3]Checking tube: high pressure pipe to tap: (-).0710.B2
[4]Checking tube: high pressure pump to tap: (-).0710.B3
[5]3-way tap: (-).0710.C
[6]Union: (-).0710.J
[7]Union: (-).0710.K
[8] Plugs for checking valve sealing: (-).0710.H
Precautions to be taken.
Work with care to avoid entry of polluting particles into the circuit.
NOTE:The correct operation of the system requires perfect cleanliness of the fluid and of the
hydraulic components.
Check:
- The level of the power steering fluid.
- The condition of the piping and unions.
Using the tools.
Prepare the checking assembly [1], [2], [3], [4], [5], [6]and [7].
Attach the tool [1].
Remove the front RH wheel, the splash-shield and the screen wash reservoir.
B3EP16CC
B3EP16DC
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AXLES
SUSPENSION
STEERING
CHECKING THE POWER STEERING ASSISTANCE PRESSURE
Preliminary operation.
Move aside the high pressure pipe (1).
Do up:
- The union [6]on the power steering electropump.
- The union [7]on the high pressure pipe (1).
- Tighten all the unions.
Fill the power steering reservoir 10 mmabove the max. level.
IMPERATIVE: Use new power steering fluid for both filling and topping-up the circuit.
Open the tap [5].
Start the engine and allow it to run for 5 seconds.
Stop the engine.
Move the steering several timesin each direction.
Check the steering fluid level and make sure that there are no leaks.
Checking the electropump pressure.
Start the engine.
Close the tap [5]for 5 seconds.
Open the tap [5].
Stop the engine.
At accelerated idle
(1200 to 1500rpm), the pressure should be 105 ± 5 bars.
If the electropump pressure is correct, check the valve sealing.
B3EP16EC
C4
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AXLES
SUSPENSION
STEERING
CHECKING THE POWER STEERING ASSISTANCE PRESSURE
Checking the valve sealing.
Remove the under-engine shield.
Move aside the heat shield from the steering mechanism.
Slacken the unions (2)on the power steering ram.
Uncouple the two supply pipes (3)from the distributor valve and move them aside.
Fit on the distributor valve the two plugs [8], tighten to 0,8 m.daN.
Move the steering slowly from lock to lock, to drain the ram.
Top up the level of the power steering fluid.
Open the tap [5].
Stop the engine.
Maintain the engine speed at accelerated idle.
Hold the wheels on full lock, first on one side then on the other.
The pressure should adjust to 105 ± 5 bars.
The pressure is correct: replace the steering mechanism.
The pressure is lower than the values above: replace the distributor valve.
Couple the two supply pipes (3)on the distributor valve; tighten to 0,8 m.daN.
Retighten the unions (2)on the power steering ram; tighten to 0,8 m.daN.
Remove the union [7]on the high pressure pipe (1)and the union [6]on the power steering
electropump.
Refit:
- the high pressure pipe (1); tighten to 2 ± 0,2 m.daN.
- the screen wash reservoir, the front RH splash-shield and the front RH wheel.
B3EP16FC
B3EP16GC
C4
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AXLES
SUSPENSION
STEERING
TIGHTENING TORQUES: POWER-ASSISTED STEERING
Power steering
XSARA
Tightening torques (m.daN).
(7)Pivot ball-joint nut: 4
(8)Link rod lock nut: 4.5
(9)Ball-joint on steering rack: 6
(10)Fixing on subframe: 5
(11) Hydraulic pipe connection: 2.5
(12)Valve to housing fixing: 1.2
(13)Plunger flange screw: 1.2
(14) Screw fixing the steering ram
to the housing: 5.5
(15)Nut fixing the steering ram
to the yoke: 5.5
B3EP08RD
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AXLES
SUSPENSION
STEERING
TIGHTENING TORQUES: POWER-ASSISTED STEERING
XSARA
Power-assisted steering assembly
T
ightening torques (m.daN).
High pressure tube (rubber seal pump side)Power-assisted valve and pump union: 2.5
Return pipe.
Power-assisted valve union: 2.5
(16)Upper front fixing (E3) : 2.5
(17)Upper rear fixing (E3) : 2.2
(18)Fixing (E3) : 2.2
Tightening sequence.
Tighten screws (16) and (18).
Lightly tighten screw (17), then fully tighten.
Pressure switch on the pressure circuit.
Switch opens 30to 35 bars.
Switch closes 25 bars.
Tighten to: 2 m.daN.
B3EP045D
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AXLES
SUSPENSION
STEERING
TIGHTENING TORQUES: POWER-ASSISTED STEERING
Tightening torques (m.daN).
(7) Pivot ball-joint nut: 4 ± 0.4
(8) Steering rod adjusting lock nut: 4.5 ± 0.4
(9)Ball-joint on steering rack: 6 ± 0.6
(10) Fixing steering on subframe: 8 ± 0.8
(11)Hydraulic pipe connection: 2.4 ± 0.2
(12)Power steering valve: 1.2 ± 0.2
(13)Plunger flange screws: 1.2 ± 0.2
(14)Steering ram screw on housing: 9 ± 1
(15) Steering ram screw on yoke: 9 ± 1
NOTE:When removing the steering, it is imperative to replace screws
(14)and (15)
(new screws).
B3EP117D
XSARA PICASSO
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