turn Citroen CX 1985 1.G Service Manual

Downloaded from www.Manualslib.com manuals search engine b) Control unit : ’
The contra! unit located below the steering wheel, consists of a distributor slide-valve ( C ) which. when
hydraulic pressure on either side of it is the same ensures in chamber 1 the necessary pressure for the
steerinq piston
Movement of rockers E when turning
to the riqht
F
E
D
C
Return to reservoir
HP
QV re Wh <‘,I s I? cw%g .’
Within permitted clearance (1 J ):, shaft A rotates pinion F Pinion B and pinion D are then in mesh f NII~/ nl(,<.l1~)ji(nll>~
lillk cd lo II1 1’ ~/~~c,~i/lg /~ir/io/l 1. Rockers E tilt, and cause slide-valve C to move.along its bore
_ Upward movement : Chamber 1 of hydraulic ram supplied in HP
- Downward movement Chamber 1 of hydraulic ram linked to the return to the reservoir
lic,Inr~i lo fm.silio~i 0 I ~~yiiilihrif~vf
Movement of rack causes movement of its control pinion. pinion B and pinion D Pinion F being then locked in posi-
tion, pinion D acts on rockers E. which in turn brinq back slide-valve C to its position of equilibrium.
NOTES :
1) Manual operation is ensured by shaft A being mechanically connected to pinion B after cancellation of clearance
a J )).
2) The steering rack is hydraulically locked for any steering position, which ensures great directional stability of
the vehicle.

Downloaded from www.Manualslib.com manuals search engine d
m
.-
0
2
f Op. MA. 440-00
7 -
b) Steering governor :
It is situated on the front subframe, and mechanically driven ( cable ) by the final drive unit in the gearbox.
Ei A ”
VEHICLE STOPPED (engine running)
L.44-14b
I/ /II I Pressure
IL Towards
HP cam cylinder
VEHICLE IN MOTION
* Slide-valve A is linked in linear motion to lever B
- Fly-weights C, which rotate ( and fly towards under the effect of centrifugal force ) cause lever B to tilt.
=
L'nrioblc, position of slide-valve A, allows the pressure exerted on the cam cylinder piston to be varied.
NOTE In order to make possible the powered return function. the steerinq governor supplies a pressure
of 20 i-15 bars ( 290 +173 psi ) when the vehicle is stopped f 11
i/F /hc cwgir/e wt/t~iv.g i.
I
POWERED RETURN
The powered return is a combination of the two preceding functions, the variable feel function controlling the
power-operation function.

Downloaded from www.Manualslib.com manuals search engine a ) Mechanical principle
After having steered the driver lets go of the
s teerinq wheel
Piston F applyinq pressure to cam H, causes the
latter to rotate.
- Pinion B in one piece with the cam rotates control
shaft A.
- Rotation of control shaft A, is transmitted to
pinion E which causes rockers D to tilt and
slidecvalve C to move which moves the rack.
This movement stops when roller G reaches
the hollow part of cam H ( ro/~/i<,//~/ /or(//((’ is
(-(II/( V/I< N’ ) The steerinq is then in the c<straiqht-
ahead i) position.
NOTE Pressure supplied by the steering governor
is applied to piston F via a variable output requlator
in order to slow down the return of the steerinq to the
v straiqht-ahead a) position.
b)
Variable output regulator :
Wh(‘I/ \I< criq .’ return of piston F causes the
following
_ Expulsion of fluid through one-way valve L
= Compression of sprinq K. which pushes back
sleeve I uncovering ports J.
(1 . I vl,riil,q rc l//rI/ D
- Fluid flows throuqh channel M ( valve L closed )
and through calibrated port N, forcing back sleeve I.
= Sleeve I compresses sprinq K sliqhtly and slowly
covers ports J as piston F moves.

Downloaded from www.Manualslib.com manuals search engine BRAKE VALVE
B. 45-8 a
Overflow return Rear brakes Front brakes
1. Snap ring
2. Spring
3. 1’ 0” ring
4. Plug
5. Thrust washer
6. Rear slide-valve
7: Front slide-valve
8. Spring
9: Thrust cup
10. Circlip
11. Rubber protective sleeve
12. Securing bush
13. Snap rings
14. Rubber damper
NOTE If the brake valve is not fitted with an external overflow return, it is incorporated in the operational
return ( Return to reservoir ).
WARNING Three types of brake valve fitted with a single return system incorporated in the operational return
have been used.
= is/
/it/i//g brake valve painted green with overflow pointing upwards
= _)IIII
fi/tirlg : brake valve with green paint mark, and overflow pointing downwards
_ i1.d
/it/i,l~q’: brake valve with green paint mark on L H side and overflow pointing downwards
I. CHARACTERlSTlCS
Main braking system :
- Disc brakes on all four wheels with r~u/iln/ct/ tlisrs at the front ( Sn/oo//~ I
front and rear ( I:sIN/~ s i
- Four pistons per brake unit. at the front
- Two pistons per brake unit, at the rear
- Power operated hydraulic control ( brake valve incorporated in system )
z The front braking system is supplied by the main accumulator ( c,~l~icI~~.s
rli/ll vrn~l//~/ SIC criug J or by the
the brake accumulator ( I’orr,< J’
s/ccrivg rc,/~iclc,s 1.
- The rear braking system is supplied by the rear suspension. and is fitted with a brake pressure limiter cn
I:SIUI(J vehicles
-
The inner half-unit at the front is in one piece with the swivel.
- The outer half-unit at the front is removable.
Handbroke ( Emergency brake ) :
w
Independent from the main braking system.
- Two independent brake pads acting on front discs.
- Ratio
- cx 2000 - 2 197 j ___._....._..._..._.........,............................................................................... 101 1
- All CX vehicles 2 1’j75 -
. . . . . . 123 1
Total braking area :
- Main braking system : 316 dm2 - 48.98 sq.in ( Snloor~s ) or 365 cm2 - 56.57 sq.in f f:sfrffcss )
v
Handbrake ( emergency brake ) 49 cm2 ( 7.59 sq.in )

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 453=0 : Ch J k’ ( c zng and adjjusfing thr hydraulk brake rontrol Op. MA. 453-O 3
III. CHECKING BRAKE PEDAL FREE PLAY
1 st Fitting 2nd Fitting
1 5 111 (I I /‘)7-t __t i%
+ 1. Turn screw ( 1 ) to obtain a clearance of
s
E
(( J )) ~~ 0.05 to 3 mm
-ii Tighten lock-nut ( 2 ).
2 2. Ch k’ ec Ing operation of brake pedal :
a) Release pressure in system.
Set manual height control to /or! /~~.s\‘itio~/
Slacken pressure regulator bleed screw.
( I/ Ill<, I <~/liClC~ is /ill1 rl i, ill, N I~tYlk~~ n~-rllrlll,Inlo,~. nc/un/1 II?<, /I< r/al.
hnke nr c111uu/n/0,. ).
b) Depress pedal three or four times to move the control slide valve to the end of its stroke, and ensure that
pedal returns freely to its stop.
There should be no variation of clearance o J )) as initially set.
Tighten pressure regulator bleed screw.
IV. ADJUSTING THE STOPLAMP SWITCH
1.
Check adjustment of free play on brake pedal ( see above ).
2. Adiusting the stoplamp
The stoplamps must light as soon as the pedal contacts the brake valve.
Bend support plate u a )) of the switch in order to achieve this condition.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 454-O : Lhcckiu~ avd adjnsfbrR fhe bandbrake op. MA. 454-u I CHECKING AND ADJUSTING THE HANDBRAKE
1.
Raise front of vehicle ( wheels free ).
Remove front wheels.
Release handbrake lever to maximum extent 2. Adjust eccentrics :
a) Remove adjustment nuts ( 1 ) and lock-nuts (2.)
for handbrake cables.
b ) O,,,‘varh hmokt~ ,,rzit :
Slacken SCI~WS (4) of eccentrics ( 6 ). Ensure
With spanner 6501-T turn eccentrics as shown f rrpu,ards ) until the pads just contact the disc
at point of maximum run-out.
Tighten screws (4) from 6 to 6.5 daNm (43 l/2
to 47 ft.lb ).
Check correct contact of pads.
Screw down stop SCI~W (3) until it contacts
the brake unit housing ( tighfrn its lock EN! 1, 3. Adjusting hondbrake control cables :
, On rnrh hrnkc ,,,, if:
Ensure <hat the sleeve and its stop (8) are
correctly positioned.
Pull alfcmnf~~iy on each threaded end-piece (7 )
ond measure its protrusion (< c 1).
.Example : Protrusion on right-hand side = 30 mm
Protrusion on left-hand side = 26mm Difference in length of cable must remain the
some after adiuitment.

Downloaded from www.Manualslib.com manuals search engine Il. CHECKING THE REGULATED TENSION OF THE REGULATORS
CHARACTERISTICS
- Two-stage voltage regulator : Ref : DUCELLIER 8379 A, PARIS-RHONE AYC 2114 and AYC 2117.
SEV-MARCHAL F. 14 V 72717102
These voltage regulators determine the intensity of the current in the alternator inductor in order to maintain a
constant regulated voltage at the battery terminals.
, CHECKING THE REGULATED VOLTAGE
(.‘hcckitlg ti7c rc~~~~~l~tc~cl u~IIcl,~c~ mris t 170 rnrric,rl out u,ith a lrilly darg~~rl hnttcry.
Connect up as per diagram below, using a voltmeter V, an ammeter A and a rheostat, or better still, using a
combined
o voltmeter/ammeter/ rheostat )).
Start engine, and let it idle.
Switch off the ignition, and immediately switch it back on in
order to demagnetize the voltage regulator.
Accelerate the engine so as to reach the adjustment speed for the alternator. Actuate the rheostat, smoothly
without turning it back, in order to increase the current supplied by the alternator, and read the corresponding
voltage.
Take several measurements of regulated tension, and check that the values obtained are between 13 and 14.2 volts,
taking into account the correction value due to the temperature. If the readings are not correct, replace voltage
regulator.
Exe Voltage regulators : DUCELLIER 8379 A
PARIS-RHONE ;;E ;;;; -
SEV-MARCHAL F.14 V72717102
- Adjustment speed : 6000 rpm (alternator)
2750 rpm (engine)
- R egulated voltage adjustment :
between 13 and 14.2 V

Downloaded from www.Manualslib.com manuals search engine m- 6 7 3. Checking operation of starter pinion (4) in
/ forward position :
7hcrc “lP ,,c,, nllrn,nli,~r~ rn<~~h”LS : OPERATION No MA. 530-O : (./ 1< ‘ ,,,g II,‘, vl<~rtricnl rompo,,w,ls , -k’ Op. MA. 530-O 3
ALL ENGINES
III. ADJUSTMENT OF THE CONTROL PINION FOR
A DUCELLIER 6236 A STARTER MOTOR.
f Sl”l’,Pl xmor~rdI
1.
Remove plastic plug (5) from nut ( 1 )
2. Disconnect inductor supply lead (7 ) from
solenoid. a) Mechanically :
Push core of solenoid (3 ) inwards to
fullest extent using a 10 mm box spanner
against the shouldering of plastic nut (1 )
and in direction of nrmw r.
b) Electrically :
'rbis ,w!hod has fh~ ndr'ontopr~ of rfwrking
solomid holrl.irz rrirdivg.
Connect the Iollowing :
positive terminal of (I 12 volt battery to
solenoid supply termina1 (6 ),
_ negative terminal to an earthing point on
the solenoid f V.R. poisl GC VI )) %
Using a 10 mm box spanner oqainst the
shouldering of plastic nut (1 ) as at F, push
solenoid core until it is attracted by winding
of solenoid ( 3 ).
fIrI this msr. fbc nr~~rhn~~irnl hi, irip ri 0,
!hc solwoid COY<, r<~plor<~s I/?<, i,,?“,<~diOl<~
or/ion 0i the solwoid pull-i,, vi,,di~~ 1.
c) With the starter pinion (4 ) in the forward
position measure the distance /, c )r betwe&
the end of the pinion and the stop (8 ).
This reading should equal : c = 0.5 to 1 mm
If not reset adjusting nut (11 ).
To do this :
Remove the 3 fixing saews (2 ) of solenoid
(3 ) and draw it backwards to its maximum
extent in order to prevent the core from
turning by means of a screwdriver set in
notch N a u.
Measure the distance I< c 1) after fitting the
solenoid (3 ). each time, using the 3 fixing
screws ( 2 ‘J.
Disconnect battery
from solenoid.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 540-O : (hcrking and diusfing the hradlmnps. Op. MA. 540.0 1 ADJUSTING THE HEADLAMPS USING A << REGLOSCOPE >> OR I< REGLOLUX n TYPE APPARATUS
I. CONDITIONS FOR ADJUSTMENT
With the vehicle empty and in running order :
a) Ensure that the tyre ore correctly inflated
and heights correctly adjusted.
Place vehicle on CI flat level surface.
Run the engine at idling speed and set manual.
height control to normal running position.
1 Place the instrument on the same level as that
of the vehicle and opposite the headlamp to be
adjusted. 2. ADJUSTMENT
Horizontal adiustment
Switch on the dipped headlamps.
711~ pn,lcrv 01 111~ lwflrn projected on the screen
of the testing apparatus is a broken line (Euro
pea-dip type 1. Set the intersection point of this
line on the vertical point of the screen by turning
adjusting knobs ( 1 ) and (3 ).
Equalize adjustment, screwing and unscrewing
knobs (
1) and (3 1 by the same amount.
Vertical .dius+ment :
Switch on dipped headlamps
Turn the adjustment knob (2) so that the hrokr’n
lirw coincides with the upper line of the shaded
cwea on the screen ( European-dip type ) (Adjust-
ment without tolerance ). 3. Checking the setting :
Switch on the headlamp main beam.
The point of maximum illumination should coincide
with the (’ headlamps 3) mark on the screen of the
apparatus.
The height of the main beam can be adjusted by
means of adjusting screw (4 1 located under the
headlamp unit.
After actuating this screw, it is essential to seal
it, using seoling paste far example. 4. Adiust the other headlamp :

Downloaded from www.Manualslib.com manuals search engine II. OPERATING PRINCIPLE
The refrigerating system has four main components
- the compressor ( 4)
- the condenser ( 7)
- the pressure release valve (3 i
*
the evaporator ( 1 )
The refrigerating fluid used is the F. 12
L.64.1 a
Compressor
(4) - Manufacturer ASPERA FRIGO. type HG 700 ( or SANKYO type SD 508 on EMBAUT CLIMAT )
ASPERA twin-cylinder or
SANKYO five-cylinder rotary 1 Fitted onto the gearbox by means of a mounting bracket
The compressor circulates the refrigerating fluid draws in the fluid which is in a low-pressure vapour state
compresses it ( which increases its temperature ) and expels it into the condenser.
The condenser is driven by the engine via the water pump by two trapezoidal belts ( ASPERA ) or one trapezoidal
belt ( SANKYO ).
An electro-magnetic clutch is fitted to the compressor pulley. Its operation controlled by a switch on the centre
console is intermittent due to the presence of an ambient temperature thermostat ( 2 ) which is not adjustable, and
which senses the temperature near the evaporator cooling fins.
In case of excessive pressure in the return circuit, a pressure switch (6) opens the supply circuit to the compressor
clutch.
Condenser (7 ) - Manufacturer CHAUSSON
It allows the fluid to condense and to release its latent heat to the outside air circulating around the fins. It is
secured to the front L.H. side of the engine cooling radiator At the condenser outlet, the fluid is in the high-
pressure liquid state. The fluid flows through the tank ( 5) ( which contains a dehydrating filter ) and flows
towards the pressure release valve.
A 5-blade electric fan accelerates the circulation of air around the condenser fins.
De-watering tank .( 5) - Manufacturer : SINGER
It contains a dehydrating filter element, and is fitted with a visible level indicator, which allows the amdunt .and
state of the fluid to be checked, and a high-pressure switch (6).
The de-watering tank is fitted on the front panel by means of a mounting bracket at the rear L.H. side of the
engine cooling radiator.
Pressure-release valve (3) : It is incorporated in the heater unit, and regulates the output of fluid towards the
evaporator.
Evaporator ( 1) - Manufacturer SOFICA
The air flowing through the evaporator releases its calories, ‘which will cause the low pressure fluid to be
transformed into vapour.
It is incorporated in the heater unit upstream from the heater radiator.