Get Axles, Suspension, Steering Guide for Citroen C6 4 Door First Generation (2005-2012)

WHEEL AND TYRES

3.0i 24S

XFV

2,7 24V

UHZ

Engine plate

Tyre/circumference

Type

S

225/55 R17 97W/2,071 m

245/45 R18 100W/2,065m

Michelin PRIMACY

T

Wheel

A

7 J17-CH5-32

SATURNE

8 J18-CH5-33

SAN MARIN 2

8 J18-CH5-33

SAN MARIN 2

Name of rim

Normal operating pressure:

front/rear

2,4/2,4

Pressure for maximum load :

front/rear

2,6/2,6

2,4/2,4

2,6/2,6

Pressure: loaded, high speed:

front/rear

2,4/2,4

Tyre

S

T

225/55 R17 97W

Spare wheel

7 J17-5-32

2,4

Normal operating pressure

Pressure for maximum load

Pressure: loaded, high speed

2,6

2,4

S = Standard fitting.

NOTE: The label indicating the recommended tyre pressures is affixed to the front LH door pillar.

T = Steel wheel.

A = Alloy wheel.

121

WHEEL AND TYRES

Identification of inflation pressures

NOTE: The label indicating the recommended tyre pressures is affixed to the front

LH door pillar.

«a» Recommended tyre inflation pressures (empty and under load)

«b» Tyre specifications

«c» Type of tyres

«d» Recommended inflation pressure for the spare wheel

B2GP01FD

122

WHEEL AND TYRES

Identification of the wheel bolts

(1) Wheel bolt (all rim types)

(2) Light alloy wheel

(3) Steel aluminium wheel

NOTE: If mixed fixing bolts are fitted on steel wheels, the shoulders of the bolts

remain free.

Tightening torques for the wheel bolts.

9

1 m.daN

B2GP00JD

123

WHEEL AND TYRES

Deflation detection system

(4) Valve

(5) Antenna

(8) Seal

(9) Cap

(10) Nut

(6) HF transmitter unit

(7) Washer

Composition.

A SIEMENS HF transmitter module (6) integral to each wheel in the place of the

valve, each including a lithium battery.

An HF receiver in the communication module under the dashboard.

WARNING: Each time a tyre is replaced, it is necessary to replace the valve (4).

WARNING: Each time a wheel rim is replaced, it is necessary to replace the

seal (8).

WARNING: Each time a transmitter module is changed, it is necessary to have

the replacement recognised by the deflation detection ECU, using a diagnostic

tool.

B2GP01ND

124

CHECKING AND ADJUSTING VEHICLE HEIGHT

Reference heights: REFERENCE = Ignition switched on

IMPERATIVE: Respect the safety and cleanliness requirements.

Tools.

: 9801-T

[1] Gauge for measuring radius of wheels (5 bolts)

[2] Gauge for height under bodyshell

[3] LEXIA station

: 2305-T

: 4171-T

: 4165-T

[4] PROXIA station

Preliminary operations.

Check the tyre pressures.

Place the vehicle on a 4 column lift.

Switch on the ignition.

Release the parking brake.

Put the vehicle in the high position.

Put the vehicle in the normal height position (driving height).

During: During the measuring, do not move the vehicle.

125

CHECKING AND ADJUSTING VEHICLE HEIGHT

Warning: During measurement of reference heights: Do not switch off the ignition

Reference heights: REFERENCE = Ignition switched on

Measuring the front wheel radiuses

Measuring the front heights

B3CP0AQD

B3CP0ASD

B3CP0ARD

Place the tool [1] on the wheel

fixing bolts.

Measure, using tool [2].

Measure the wheel radiuses

using tool [2].

The front LH height H1M: Measure between the ground and zone A under the front subframe.

The front RH height H2M: Measure between the ground and zone B under the front subframe.

126

CHECKING AND ADJUSTING VEHICLE HEIGHT

Reference heights: REFERENCE = Ignition switched on

Measuring the rear wheel radiuses

Measuring the rear heights

B3CP06AC

B3CP0AUD

B3CP0ATD

Place the tool [1] on the wheel

fixing bolts.

Measure, using tool [2].

Measure the wheel radiuses

using tool [2].

The rear LH height H3M: Measure between the ground and zone C under the rear axle crossmember.

The rear RH height H4M: Measure between the ground and zone D under the rear axle crossmember.

127

CHECKING AND ADJUSTING VEHICLE HEIGHT

Reference heights: REFERENCE = Ignition switched on

Adjusting the heights.

Calculate the following values:

- Front LH

: K1M = R1 - H1M.

: K2M = R2 - H2M.

: K3M = R3 - H3M.

: K4M = R4 - H4M.

- Front RH

- Rear LH

- Rear RH

Connect the diagnostic tool [3] or [4] to the vehicle's diagnostic socket.

Switch on the ignition.

Perform a global test.

Go into the menu.

Variable damping.

Adjustment of vehicle reference heights.

Enter the values K1M, K2M, K3M and K4M in the diagnostic tool.

WARNING: The values should consist of 4 figures: Example: K1 = 160 mm - enter the value 0160.

Checking the heights after adjustment.

Check the heights:

- Front LH

- Front RH

- Rear LH

- Rear RH

: K1 = 160 6 mm.

: K2 = 160 6 mm.

: K3 = 111 6 mm.

: K4 = 111 6 mm.

128

VALUES FOR CHECKING AND ADJUSTING AXLE GEOMETRIES

IMPERATIVE: Respect the safety and cleanliness requirements.

Conditions for checking and adjusting.

Check the tyre pressures.

Tools.

Place the vehicle on a 4 column lift.

Check and adjust if necessary the vehicle heights (see corresponding

operation).

[1] Gauge for measuring radius of wheels (5 bolts) : 9801-T

[2] Gauge for height under bodyshell

: 2305-T

Steering rack locked at its zero point (see corresponding operation).

Switch off the ignition before removing the tools from the wheels.

Lower the vehicle.

WARNING: «Check and adjust the axle geometries at reference

height».

Start the engine.

Put the vehicle in the high position.

Put the vehicle in the normal height position (driving height).

Stop the engine.

Switch on the ignition.

Check and adjust the front and rear axle geometries at reference

height.

WARNING: Do not switch off the ignition during checking and

adusting of the front and rear axle geometries.

NOTE: Front of vehicle (following the arrow).

NOTE

A < B = Positive figure:

A > B = Negative figure:

+ =

- =

TOE-IN

B3CP02UC

TOE-OUT

129

VALUES FOR CHECKING AND ADJUSTING AXLE GEOMETRIES

Rod for adjusting the rear tracking.

(1) Locking screw

(2) Adjusting screw

B3BP1BND

130

VALUES FOR CHECKING AND ADJUSTING AXLE GEOMETRIES

Reference heights: REFERENCE = Ignition switched on

Front axle

Rear axle

Dissymmetry of lower castor: 0° 30'.

Dissymmetry of lower camber: 0° 25'.

Dissymmetry of lower camber: 0° 30.

IMPERATIVE: Distribute symmetrically, LH / RH wheel, the total tracking value.

«Tyres: 225/55 R17»

Front axle

Rear axle

Camber

Pivot

Angle

Push

Angle

Vehicle

C6

Tracking

Castor

Camber

Tracking

Adjustable

Non adjustable

Adjustable

Non adjustable

mm

0°

- 1

1

4,32

1

5° 30' 30'

- 0°24' 30

8° 40' 30'

- 1° 27' 30'

0° 12'

- 0°09' 0°09'

0° 34' 0°09'

«Tyres: 245/45 R18»

Front axle

Castor

Rear axle

Camber

Pivot

Angle

Push

Angle

Vehicle

Tracking

Camber

Tracking

Adjustable

Non adjustable

Adjustable

Non adjustable

mm

0°

- 1,1

1

4,58

1

C6

5° 30' 30'

- 0°24' 30

8° 40' 30'

- 1° 27' 30'

0° 12'

- 0°09' 0°09'

0° 34' 0°09'

131

VALUES FOR CHECKING AND ADJUSTING AXLE GEOMETRIES

Warning: During measuring of PARKING heights: Switch off the ignition

PARKING heights: (values given AS A GUIDE only)

Front and rear PARKING heights (ignition switched off)

Front axle

Rear axle

B3CP0ATD

B3CP0ARD

Front LH: K1 = 175 6 mm

Front RH: K2 = 175 6 mm

Rear LH: K3 = 131 6 mm

Rear RH: K4 = 131 6 mm

132

VALUES FOR CHECKING AND ADJUSTING AXLE GEOMETRIES

PARKING heights: (values given AS A GUIDE only)

Front and rear PARKING heights (ignition switched off)

Front axle

Rear axle

Dissymmetry of lower castor: 0° 30'.

Dissymmetry of lower camber: 0° 25'.

Dissymmetry of lower camber: 0° 30.

IMPERATIVE: Distribute symmetrically, LH / RH wheel, the total tracking value.

«Tyres: 225/55 R17»

Front axle

Rear axle

Camber

Pivot

Angle

Pivot

Angle

Vehicle

Tracking

Castor

Camber

Tracking

Adjustable

Non adjustable

Adjustable

Non adjustable

mm

0°

- 2,32

1

5,13

1

C6

5° 30' 30'

- 0°30' 30

8° 21' 30'

- 1° 54' 30'

0° 12'

- 0°18' 0°09'

0° 41' 0°09'

«Tyres: 245/45 R18»

Front axle

Castor

Rear axle

Camber

Pivot

Angle

Pivot

Angle

Vehicle

Tracking

Camber

Tracking

Adjustable

Non adjustable

Adjustable

Non adjustable

mm

0°

- 2,46

- 0°18' 0°09'

1

5,43

0° 41' 0°09'

1

C6

5° 30' 30'

- 0°30' 30

8° 21' 30'

- 1° 54' 30'

0° 12'

133

FRONT AXLE

ES9A

Front subframe.

Front subframe in cast aluminium alloy.

NOTE: Subframe positioned by indexing on body.

Front subframe frame with screwed-in subframe extensions (UHZ engine).

(1) Front subframe frame crossmember

(2) Subframe extensions

B3CP09BD

DT17BTED4

(3) Front subframe

Front subframe frame with welded subframe extensions (XFV engine).

(3) Front subframe

(4) Front subframe frame

B3CP09LD

134

FRONT AXLE

Front pivot.

Front pivot fixed on the pivot support by means of an upper balljoint and a lower balljoint.

Front hub bearing:

- Diameter 83 mm.

- Bearing with double row of balls, with an integral magnetic wheel (48 pairs of poles).

Suspension leg:

- Front axle with wheels independent, of multi-arm type.

- Travel stop: height 60 mm.

- Anti-roll bar

Anti-roll bar

Engines

ES9A

Diameter (mm)

23,5 mm

Colour ref.

Yellow

DT17BTED4

24 mm

Pink

NOTE: The geometry specifications are given with the values for checking and adjusting the

axle geometries.

B3CP09CC

135

FRONT AXLE: TIGHTENING TORQUES

Engines: ES9A - DT17BTED4

Suspension leg

Body suspension upper support

1

2

3

4

5

6

7

8

9

2,6 0,3

2,4 0,3

4,5 0,6

8,5 0,8

Front suspension cylinder on Suspension upper support

Suspension upper arm on Suspension upper support

Suspension upper arm on Pivot support

Front anti-roll bar rod on Pivot support

Pivot upper balljoint on Pivot support

20,5

2

15 1,5

Pivot upper balljoint nut

6

5

0,6

0,5

Front anti-roll bar rod on Front anti-roll bar

Suspension lower arm on Pivot support

B3CP09DC

7,5 1,1

B3CP09EC

136

FRONT AXLE: TIGHTENING TORQUES

Engines: ES9A - DT17BTED4

Suspension leg

Pivot lower balljoint on Pivot support

10

11

12

6,5 0,9

17 1,7

3,5 0,3

Pivot lower balljoint on Pivot support

Steering rack balljoint on Front pivot

B3CP09FC

137

FRONT AXLE: TIGHTENING TORQUES

Engines: ES9A - DT17BTED4

Front subframe

Front subframe frame tie-bar on Body

13

14

15

16

17

18

19

20

21

22

23

24

5

0,7

Front subframe frame tie-bar on Front subframe frame

Front absorber support tie-bar

6,5 0,9

Front subframe frame on Subframe extension

Front subframe frame crossmember

Subframe extension on Front subframe

Front subframe stabiliser bar

10

1

5,5 0,5

12,5 1,2

14 1,4

6,5 0,6

11 1,1

Front subframe on Body

B3CP09GD

Suspension lower arm on Front subframe

Front anti-roll bar bearing on Front subframe

Body yoke

4,5 0,6

10

1

B3CP09HD

138

FRONT AXLE: TIGHTENING TORQUES

Engines: ES9A - DT17BTED4

Front subframe

Suspension lower arm support on Front subframe

Suspension lower arm on Front subframe

25

26

6,5 0,9

12,3 1,2

B3CP09TC

139

REAR AXLE

Rear axle

(1) Rear axle crossmember

(2) Rear axle crossmember rear rubber bush

(3) Rear axle crossmember front rubber bush

(4) Suspension longitudinal arm

NOTE: Rear axle in cast aluminium alloy, of multi-arm type.

(5) Suspension upper arm

(6) Rear pivot

(7) Hub-bearing

(8) Tracking adjustment rod

(9) Suspension lower arm

B3DP0BYD

Rear pivot

Hub-bearing:

- The rear hub-bearing is equipped with an ABS radial target (48 pairs of poles).

Stub axle:

- Diameter 32 mm.

- The stub axle, joined onto the rear pivot, is not separable.

IMPERATIVE: The rear hub-bearing must not be placed in proximity to a source of

magnetism or of pollution by metal particles. Components must be clean and free from

any signs of abnormal wear or damage.

B3DP0BZD

140

REAR AXLE

(10) Rear anti-roll bar bearing

(11) Rear anti-roll bar bearing half-support

(12) Rear anti-roll bar

(13) Rear anti-roll bar rod

NOTE: The rear anti-roll bar bearings are not separable.

Anti-roll bar

Engines

Diameter (mm)

20,6

Colour ref.

Orange

ES9A - DT17BTED4

Vehicle geometry.

NOTE: The geometry specifications are given with the values for checking and adjusting the

axle geometries.

B3BP1AED

141

REAR AXLE: TIGHTENING TORQUES

Engines: ES9A - DT17BTED4

1

2

3

4

5

6

7

8

9

Rear axle crossmember on Body

7,5 0,7

Rear anti-roll bar bearing on Body

Tracking adjustment rod on Rear pivot

Rear suspension cylinder on Rear pivot

Suspension longitudinal arm on Rear pivot

Suspension lower arm on Rear pivot

Suspension lower arm on Rear axle crossmember

Tracking adjustment rod on Rear axle crossmember

Locking of tracking adjustment rod

7

1

0,7

0,2

B3DP0BUD

Suspension longitudinal arm on Body

Pre-tightening

Angular tightening

10

3,3 0,3

150° 5°

B3DP0BVD

142

REAR AXLE: TIGHTENING TORQUES

Engines: ES9A - DT17BTED4

11

12

13

14

15

16

17

Suspension upper arm on Rear pivot

Suspension upper arm on Rear axle crossmember

Rear suspension cylinder on Rear axle crossmember

Rear anti-roll bar rod on Rear pivot

7

4

0,7

0,6

Rear anti-roll bar rod on Rear anti-roll bar

Rear anti-roll bar bearing half support

Rear hub-bearing nut

1,8 0,4

25

2

B3DP0BWD

B3DP0BXD

143

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Location of components

A: Front suspension

B: Rear suspension

NOTE: The rear stiffness regulator is equipped with two accumulators.

(1) Variable damping suspension actuator

(2) Front suspension accumulator

(3) LDS fluid reservoir

B3BP1ASD

(4) Front suspension cylinder

Front axle

(5) Built-in Hydro-electronic Interface (BHI)

(6) Front stiffness regulator

(7) Suspension pressure sensor

(8) Front stiffness regulator accumulator

(9) Wheel travel sensor

B3CP09AD

144

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Rear axle

(10) Rear suspension cylinder

(11) Rear suspension accumulator

(12) Variable damping suspension actuator

(13) Suspension pressure sensor

(14) Rear stiffness regulator accumulator

(15) Rear stiffness regulator

(16) Wheel travel sensor

Source of pressure.

Features.

Hydraulic fluid

: LDS TOTAL H50126.

The LDS fluid orange in colour is 100% synthetic.

Capacity of the hydraulic circuit

B3DP0BSD

: 6.3 litres.

LDS fluid reservoir

NOTE: LDS: Liquide Direction Suspension (steering/suspension fluid).

«a» LDS fluid reservoir filler (cap)

«b» Suction (BHI) (power steering pump)

«c» Return (stiffness regulators)

«d» Return (power steering pump)

«e» Return (filter)

«f» Suction (filter)

The level of the LDS fluid must be checked with the vehicle in the low position (refer to the

procedure «Depressurisation: suspension circuit»).

B4BP01SD

145

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Built-in Hydro-electronic Interface (BHI)

Composition of the Built-in Hydro-electronic Interface:

- An electric motor.

- A pump with 5 pistons.

- 4 electrovalves.

- 2 non-return valves.

- A pressure limiter.

- An anti-pulse accumulator.

- A filter.

- The suspension ECU.

Features of variable damping suspension.

Variable damping suspension ECU (CSS).

The ECU (CSS) is located in the engine compartment, in the ECU tray.

The ECU (CSS) manages the different damping laws, as a function of the information delivered

by the following components:

- The 4 wheel travel sensors.

- The 2 suspension pressure sensors.

- The speed of the vehicle.

- The speed of rotation of the steering wheel.

The suspension ECU (CSS) pilots the following components:

- The 4 variable damping suspension actuators.

- The Built-in Hydro-electronic Interface (BHI).

B3BP1A1C

146

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Wheel travel sensor

(9) Front RH wheel travel sensor

The wheel travel sensor defines the angular position of the suspension lower arm.

Identification of the sensors:

- Front RH wheel travel sensor

- Front LH wheel travel sensor

- Rear RH wheel travel sensor

- Rear LH wheel travel sensor

: Yellow.

: Red.

: Green.

: Blue.

B3BP19ZC

Suspension pressure sensor

IMPERATIVE: Before operating on a wheel travel sensor, uncouple its rod so as not to

go past the maximum angular travel (see corresponding operation).

The suspension pressure sensors (7) informs the suspension ECU (CSS) of the pressure in

the hydraulic high pressure pipes of the front suspension.

The sensor (13) informs the suspension ECU (CSS) of the pressure in the hydraulic high

pressure pipes of the rear suspension.

B3BP19YC

147

ACTIVE SUSPENSION WITH VARIABLE DAMPING

Variable damping suspension actuator

Each suspension cylinder has a variable damping suspension actuator.

(1) Variable damping suspension actuators (front)

(12) Variable damping suspension actuators (rear)

Anti-roll bars:

Front anti-roll bar.

ES9A

: Diameter 23.5 mm Yellow.

DT17BTED4

: Diameter 24 mm Pink.

Rear anti-roll bar.

ES9A and DT17BTED4

: Diameter 20.6 mm Orange.

B3BP1A0D

148

ACTIVE SUSPENSION WITH VARIABLE DAMPING

One-touch control for body height

«g» One-touch control to raise body height

«h» Sport mode activation/deactivation switch

«j» One-touch control to lower body height

C5FP0R8C

149

SUSPENSION: TIGHTENING TORQUES

Front suspension

Body suspension upper support

1

2

3

4

5

6

7

8

9

2,6 0,3

2,4 0,3

4,5 0,6

8,5 0,8

Front suspension cylinder on Suspension upper support

Suspension upper arm on Suspension upper support

Suspension upper arm on Pivot support

Pivot upper balljoint on Pivot support

20,5

2

15 1,5

Pivot upper balljoint nut

6

5

0,6

0,5

Front anti-roll bar rod on Front anti-roll bar

Suspension lower arm on Pivot support

7,5 1,1

B3CP09DC

B3CP09EC

150

SUSPENSION: TIGHTENING TORQUES

10

11

12

13

14

15

Front pivot lower balljoint on Pivot support

6,5 0,9

17 1,7

3,5 0,3

11 1,1

6,5 0,6

4,5 0,4

Front pivot lower balljoint on Pivot support

Steering rack balljoint on Front pivot

Rear fixing of suspension lower arm on Front subframe

Fixing of front anti-roll bar bearing on Front subframe

B3CP09FC

B3CP09WD

151

SUSPENSION: TIGHTENING TORQUES

16

17

Fixing of suspension lower arm support on Front subframe

Front fixing of suspension lower arm on Front subframe

8

0,8

12,3 1,2

B3CP09XD

152

SUSPENSION: TIGHTENING TORQUES

Rear suspension

Tracking adjustment rod on Rear pivot

18

19

20

21

22

23

24

25

Lower fixing of rear suspension cylinder on Rear pivot

Suspension longitudinal arm on Rear pivot

Suspension lower arm on Rear pivot

7

0,7

Rear anti-roll bar bearing on Body

7,5 0,7

Suspension lower arm on Rear axle crossmember

Tracking adjustment rod on Rear axle crossmember

Screw for locking of tracking adjustment rod

7

1

0,7

0,2

Suspension longitudinal arm on Body

Pre-tightening

Angular tightening

B3DP0CPD

26

3,3 0,3

150° 5°

27

28

29

Suspension upper arm on Rear pivot

Suspension upper arm on Rear axle crossmember

Upper fixing of rear suspension cylinder on Rear axle crossmember

7

0,7

B3DP0CQD

153

SUSPENSION: TIGHTENING TORQUES

Rear suspension

Upper fixing of rear anti-roll bar rod on Rear pivot

30

31

32

Lower fixing of rear anti-roll bar rod on Rear anti-roll bar

Fixing of rear anti-roll bar half-bearing

4

0,6

1,8 0,4

B3DP0CRD

154

DRAINING, FILLING AND BLEEDING THE HYDRAULIC SUSPENSION/STEERING CIRCUIT

Tools.

[1] Pliers for clic clips

[2] LEXIA diagnostic tool

[3] PROXIA diagnostic tool

: 4121-T

: 4171-T

: 4165-T

Draining.

Start the engine.

Place the vehicle in the low position.

Stop the engine.

Raise and support the vehicle, wheels hanging.

WARNING: The LDS fluid reservoir is pressurised.

Open the cap of the LDS fluid reservoir.

Remove:

- The front RH wheel.

- The front RH splash-shield.

Remove the clip (1) using tool [1].

Uncouple the hose (2) from the LDS fluid reservoir.

Drain the LDS fluid reservoir.

IMPERATIVE: Any LDS fluid recovered must not be re-used.

B3FP7HED

155

DRAINING, FILLING AND BLEEDING THE HYDRAULIC SUSPENSION/STEERING CIRCUIT

Filling.

Couple the hose (2) on the LDS fluid reservoir.

Refit:

- The clip (1).

- The front RH splash-shield.

- The front RH wheel.

Lower the vehicle.

"a" maximum level for the LDS fluid

Fill the LDS fluid reservoir up to the maximum level for the LDS fluid "a".

B3FP7HFD

156

DRAINING, FILLING AND BLEEDING THE HYDRAULIC SUSPENSION/STEERING CIRCUIT

Bleeding.

Connect tool [2] or [3] to the vehicle's diagnostic socket.

Switch on the ignition.

Perform a global test.

Go into the menu:

- Variable damping.

- Bleeding the suspension circuit.

Follow the instructions on the screen.

Apply a pressure of 0.5 bar in the LDS fluid reservoir (using a tool FACOM 920).

Start the engine.

Wait for the vehicle height to stabilise.

Place the vehicle in the high position.

Place the vehicle in the low position.

Move the steering in each direction, from lock to lock.

Stop the engine.

Check the LDS fluid level.

B3FP7HGD

157

DRAINING, FILLING AND BLEEDING THE HYDRAULIC SUSPENSION/STEERING CIRCUIT

Checking and topping up the LDS fluid level.

NOTE: Checking the LDS fluid level is done with the vehicle in the forced low position

(hydraulic suspension circuit depressurised).

"a" Maximum level for the LDS fluid

"b" Minimum level for the LDS fluid

Open the cap (3).

If necessary, add LDS fluid up to the maximum level "a".

IMPERATIVE: A container of LDS that has been opened must be sealed and kept in a

clean place. A container of LDS has to be used up within two weeks of opening, after

which any unused LDS fluid must be disposed of.

B3FP7HGD

158

POWER STEERING SPECIFICATIONS

Top of column

(1) Driver's airbag

(2) Steering wheel

(3) Controls under the steering wheel

(4) Steering lock

C5FP0U2D

(5) Fixing of steering wheel on the shaft of the steering column

(6) Steering column support

Steering column

(7) Fixing of steering cardan on the distributor valve stem

B3EP17SD

159

POWER STEERING SPECIFICATIONS

Steering mechanism

The steering mechanism with integral ram is fixed on the front subframe by two studs.

The steering assistance valve has groove technology.

The hydraulic supply and return pipes are fixed on the steering assistance valve by means of

a flange.

The adjustment of the steering push-rod is via a screw plug «a».

IMPERATIVE: The toothed washers «b» must be placed between the steering mechanism

and the front subframe.

Engines ES9A/DT17BTED4.

Steering rack travel

Number of teeth on the distributor valve pinion

Steering ratio

Number of rotations of steering wheel (from lock to lock)

Inner angle of lock

Outer angle of lock

: 90 mm x 2.

: 9.

: 1/61,26.

: 2,94.

: 37°25'.

: 31°36'.

B3EP17TD

160

POWER STEERING SPECIFICATIONS

Steering assistance circuit

(8) Steering assistance valve

(9) Steering mechanism with integral ram

(10) Low pressure piping

(11) High pressure piping

(12) Power steering pump

(13) LDS fluid reservoir

LDS fluid reservoir.

The LDS fluid reservoir supplies the suspension circuit as well as the steering assistance

circuit (fluid: LDS TOTAL H50126).

Steering assistance pump with constant flow (engines: ES9A, DT17).

The power steering pump is driven by the accessories belt.

A stepper motor incorporated in the steering assistance valve modulates the steering assistance

as a function of the vehicle speed.

Regulation pressure

Diameter of the pulley of the power steering pump.

Engine ES9A

: 115 5 bars.

: 128 mm.

Diameter of the pulley of the power steering pump.

Engine DT17BTED4

: 100 mm.

B3EP17UD

161

POWER STEERING SPECIFICATIONS

Setting the steering rack mid-point.

IMPERATIVE: Respect the precautions to be taken prior to any operation (refer to the

brochure "Recommendations-precautions").

Preliminary operation.

Raise and support the vehicle on 2-column lift.

Remove (on the RH side):

- The clip (1).

- The clip (2).

Detach the steering rack protection gaiter.

Setting.

Turn the steering wheel to full LH lock.

Measure the dimension X.

B3EP13UC

Turn the steering wheel to full RH lock.

Measure the dimension Y.

Calculate the dimension L = (Y - X) : 2.

Position the steering rack to the dimension "L" (mid point of the steering rack).

Additional operation.

Refit:

- The protection gaiter.

- The clip (2).

- The clip (1) (new).

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162

POWER STEERING: TIGHTENING TORQUES

Steering column

Engines: ES9A - DT17BTED4

1

2

Steering wheel bolt

Upper nuts

3,3 0,5

2

0,3

3

Lower nuts

4

Fixing of steering cardan on valve stem

Union of hydraulic pipe on ram

5

1,4 0,35

0,8 0,1

6

Fixing of supply pipes bracket on distributor valve

Fixing of distributor valve on steering mechanism

Steering ball-joint nut

7

2

0,2

1

8

3,5

9

Locking nut for adjustment of steering track rods

Fixing of steering rack ball-joint

5,3 0,8

9,0 0,9

0,9 0,2

14 1,4

B3EP17GD

10

11

12

Steering mechanism with integral ram

Steering mechanism stud

Steering mechanism nut

B3EP17HD

163

POWER STEERING: TIGHTENING TORQUES

Steering assistance pump:

ES9A engine

Engines: ES9A - DT17BTED4

Fixation of steering assistance pump on support

13

14

15

16

2,5 0,6

0,8 0,2

2,2 0,3

Fixation of pulley on steering assistance pump

Fixation of steering assistance pump on support

2

0,3

B3EP17JC

Steering assistance pump:

DT17BTED4 engine

B3EP17KC

164

CHECKING THE STEERING ASSISTANCE PRESSURE (ES9A ENGINE)

Tools.

[1] Pipe spanner

[2] Set of 2 hose clamps

: FACOM 18.17

: 4153-T

[3] Pressure checking assembly

[3a] Pressure gauge

[3b] Checking tube: Pressure gauge to tap

[3c] Checking tube: High pressure pipe to tap

[3d] Checking tube: High pressure pump to tap

[3e] 3-way tap

[4] Union

[5] Union

[6] Plug for checking sealing of the steering valve

:

: (-).0710.AZ

: (-).0710.B1

: (-).0710.B2

: (-).0710.B3

: (-).0710.C

: (-).0710.E1Z

: (-).0710.E2Z

: (-).0410.N

E5AP2PND

Precautions to be taken.

Work with care to avoid entry of polluting particles.

NOTE: Correct operation of the system requires the LDS fluid and the hydraulic components

to be perfectly clean.

Check:

- The level of the LDS fluid (see procedure: drain-fill-bleed the suspension circuit).

- The condition of the piping and unions.

Using the tools.

Prepare the checking assembly [3], [4] and [5].

Remove the bracket (1).

Clamp the pipe at "a", using tool [2].

Uncouple and move aside the piping (2), using tool [1].

B1BP3GPD

165

CHECKING THE STEERING ASSISTANCE PRESSURE (ES9A ENGINE)

Attach the tool [3a].

Do up:

- The union [5] on the pipe (2).

- The union [4] on the steering assistance pump.

Connect the assembly [3] to the unions [4] and [5].

Tighten all the unions.

Remove the tool [2].

Open the tap [3e].

Start the engine and allow it to run for 5 seconds.

Stop the engine.

B1BP3GQD

Move the steering several times in each direction.

Check that there are no leaks.

Checking the steering assistance pump pressure.

Start the engine.

Close the tap [3e] for 5 seconds.

Open the tap [3e].

Accelerate between 1200 and 1500 rpm, the pressure should be : 115 5 bars.

Stop the engine.

If the steering assistance pump pressure is correct, check the sealing of the valve.

B1BP3GRD

166

CHECKING THE STEERING ASSISTANCE PRESSURE (ES9A ENGINE)

Checking the valve sealing.

Remove the exhaust line (3).

Move aside the heat shield from the steering mechanism.

Slacken the union (6) on the power steering ram.

Remove:

- The screw (4).

- The bracket (7).

Uncouple the two supply pipes (5) from the distributor valve, and move them aside.

Fit on the distributor valve the tool [6], tighten the screw to: 0,8 0,1 m.daN.

Couple two pipes at the outlets of the pipes (5).

Move the steering slowly from lock to lock, to drain the ram.

Collect the LDS fluid in a tray.

B1JP08WD

Refit the exhaust line (3).

Open the tap [3e].

Start the engine.

Hold the engine speed between 1200 and 1500 rpm.

Hold the steering at full lock to the right, then at full lock to the left.

The pressure should adjust to

: 115 5 bars.

B3EP185D

167

CHECKING THE STEERING ASSISTANCE PRESSURE (ES9A ENGINE)

Remove:

- The exhaust line (3).

- The tool [6].

Couple the two supply pipes (5) on the distributor valve.

Refit:

- The bracket (7).

- The screw (4), tighten to 0,8 0,1 m.daN.

Retighten the union (6) on the power steering ram; tighten to 1,4 0,35 m.daN.

Refit the exhaust line (3).

Pinch the pipe at "a", using tool [2].

Remove:

- The assembly [3].

B1JP08WD

- The union [5] on the pipe (2).

- The union [4] on the steering assistance pump.

Couple the pipe (2), using tool [1].

Tighten the pipe (2) to 2 0,2 m.daN.

Refit the bracket (1).

Bleed the hydraulic steering assistance circuit (see corresponding operation).

Top up the level of the LDS fluid (see procedure: drain-fill-bleed the suspension circuit).

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168

BLEEDING THE HYDRAULIC STEERING ASSISTANCE CIRCUIT

Precautions to be taken.

Proceed with care so as to prevent any entry of polluting particles.

IMPERATIVE: Respect the safety and cleanliness requirements.

IMPERATIVE: Fill the LDS fluid reservoir with new fluid: TOTAL LDS.

Bleeding.

Check the level and top up the LDS fluid (see procedure: drain-fill-bleed the suspension circuit).

Apply a pressure of 0.5 bar in the LDS fluid reservoir (using tool FACOM 920).

Start the engine.

Wait for the vehicle height to stabilise.

Move the steering in each direction, from lock to lock.

Stop the engine.

Check the level and top up the LDS fluid (see procedure: drain-fill-bleed the suspension circuit).

169

Axles, Suspension, Steering for Your Citroen C6 4 Door First Generation (2005-2012)

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