hydraulic Citroen CX 1981 1.G Owner's Manual

Downloaded from www.Manualslib.com manuals search engine 9. Checking pressure switch (1) : Test procedure is the sctme as for checking
broke control.
Turn engine to obtain cut-out pressure.
Stop engine.
Operate brake pedal until the hydraulic pressure
warning lamp remains on.
Attbat point, read off pressure on pressure gauge.
This should be between 75
and 95 bars ( 1088 ta.
1378 psi 1, inclusive.
If not, change the pressure switch.
10. Checking the Front suspension : Slacken.pressure regulator bleed screw.
Remove plug E and connect front suspension
supply pipe (2 ) to safety valve.
Tighten pressure regulator bleed screw.
Start engine.
Put manual height control in
rronnaf rtmni>rp positim. Wait until the front end of vehicle rises and cut-
out takes place.
Allow pressure to stabilize.
Stop engine.
Examine pressure gauge and note pressure drop
during wperiod of 3
minutes. If it exceeds 10 bars
( 145 psi 1, check once more.
If the result is confirmed check the following
c?mponenG to determine which one is leaking :
either the front corrector
or the suspension cylinders (one or both ).
Testing the 3 components should be carried out by
eliminating each one in turn.
(I) Testing the front height cmwclor : Loosen pressure regulator bleed saew.
Put manual control in
loin position. Disconnect supply pipe (3 ) for front cylinders
from 3-way union (4 ).
Plug tube (3 ) using plug D ( female 1.
Tighten pressure regulator bleed scwe.
Place manual height control in normal running
posiGon:Start engine.
Allow pressure to stabilize.
Stop engine.
Read off pressure drop on pressure qtruqe.
If this drop in pressure is greater than
10 bars (
145 psi ) during a period of 3 minutes, repeat
test. If the result is confirmed, the front height
corrector is defective : change it.
Remove plug and connect pipe (3 ) to 3roy
union
(4 ).

Downloaded from www.Manualslib.com manuals search engine a OPERATION N’ MA. 410-O : (./~rrkiq N,,I/ VI. CHECKING AND ADJUSTING THE STEERING GEOMETRY
The crossmember supporting the steering has slots at its fixing point on the front subframe.
Any vertical movement of this crossmember alters the steering geometry.
WARNING
This operation is only to
be carried out in certain ccxses such as
-accidental impact, with repercussions on the steering system.
-work on the vehicle entoiling removal of steering crossmember.
- vehicle with poor
road stability ( p oar stright-line stability) 01 with excessive tyre weor.
CHECKING
1, Prepare the vehicle. as for checking front wheel
alignment ( Srr ~ho/,lvr
V I.
NOTE
A ) \In,,unl ~fi~<,r;,,~ I chiclvs :
With the steering in the /< straightahead 1)
position. lock the steering using CI commercially
available tool ( FACOM _ MULLER -WILMONDA)
B) PO,, P)’ \,r,rr;ng r’cliirl<,.s :
Do not actuate steering wheel during check
( hydraulic locking of rock 1.
As a precaution. a steering wheel iocking
tool may also be
used. 2. Mark position of vehicle in relation to
ground :
Secure a weighted length of string to the front
bumper. and
mark the position of the weiqht on
the ground ( The
object of this is to always bring
the vehicle
bock to the some position in order to
carry out correct measurements 1.
NOTE Other procedure
This check having to be carried out wheel hy wheel.
it is possible to use the free projector.
Secure projector to scuttle panel crossmemher, and
focus it onto a fixed object, which will indicate the
initial positioning of the vehicle.
3. Measure the variation in the wheel alignment wheel
by wheel, ds o function of the height of the vehicle.
a) From Ihc m~nwnl rlri,:ir,g posi/ior, lo /hc hi@
posilio,, f ftouad 1 :
With vehicle in mwmal rlriving position.
engine running ond position marked in relation
to groond :
Mark position of luminous spot on front graduated
rule.
Place m’anual height control lever in hi&
posilirrrl.
and wait for vehicle to stabilize.
Check and adjust if necessary position of vehicle
in relation to ground. ( II
eight 01 Inmbrous spol
ou /i wd 0 hit,< I J.
Mark position of luminous spot on front graduated
rule. and on rear one
1) Front and rear readings ore the some (no
variation in alignment in the wheel 1.
NOTE : The reading f I,i$ or lorr posilios J
on the qroduated rules differs from the initial
reading f non,,nl >r,nrlinl:
position J because
the front track has altered.
2) Front and rear readings ore different ( in this
case the alignment has oltered,.either in
toe-in or toe-out ).
0 to 1 mm toe-in is permissible on either wheel
b) ,:rr ,,I, /bv IIDIINRI hi&g ,,osi,;orr lo ,I,<, lo,,
posiliov f Hrlmuad ) :
Proceed OS for previous measurements, place
manual height control lever in low position. In
this case. the permissible difference in oliqn-
ment
is O.to 1 mm toe-out.

Downloaded from www.Manualslib.com manuals search engine II. POWER STEERING WITH POWERED RETURN
I. CHARACTERISTICS
Hydraulically operated rack and pinion steering Steering
ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13 5 i
- No of steering wheel turns from lock to lock
. . . . . . . .._._.__................................................ 25
- Turning circle (( between walls ))
11 80m
(.S x00 OIlCi ( s .2x0 solooll.~
(( between kerbs )) 10 90 m t
/( between walls )) 12 70 m
I( between kerbs 1) 11 80 m t I’\/N/l’ N/id I’n~\lix”
- Wheel alignment ( toe-in of wheels to the front i (i/l //I( //r~rjj/rll c/r;/ ii/:: p, cilirJ/i 1 1 to 4 mm
STEERING AND HYDRAULIC RACK CONTROL ASSEMBLY
1. Steering-wheel
2. Anti-theft device
3. Control unit
4. Steering shoft
5. Coupling flonge
6. Eccentric for odjusting stroight line running
7. Clomp for coupling hydraulic pipes
Jl J2 obtoined by moving clomp (5) olo
STEERING COLUMN, AND HYDRAULIC CONTROL UNIT

Downloaded from www.Manualslib.com manuals search engine THIS STEERING SYSTEM HAS THREE DIFFERENT FUNCTIONS
- Power operation i rc,d/ic-/ici// 0 I .~/I c,r-i/lg-o /Io.c,/ c’//or/ /
Stiffeninq of the steerinq as a function of the speed of the vehicle f s////it-ic,r/t /<,(,I o/ 11~1 c/c,c~ri/t.cq r/~llc(,I I//JNI(,I or
lhc, 1 cjhicle spc,c~d )
1. Steering pinion 5. Piston seal
2. Rack housing 6. Rack
3. Sleeve 7. Rack plunger
4. Piston
I SECTION THROUGH RACK AND HYDRAULIC RACK CONTROL UNIT ( OPERATING CYLINDER )
SECTION THROUGH HYDRAULIC RACK CONTROL UNIT ( OPERATING CYLINDER )
a) Hydraulic rack control unit ( operating cylinder )
The rack is connected to the hydraulic control unit ( operating cylinder )
Assume S as the piston in chamber 1, and S/ 2
its surface ( ns dcjsiguvd iu c-hmvhc 1’ 2 J.
The steering is balanced when forces F and Fl exerted on each face of the piston are equal
therefore F = S x F =Fl +x HP
HP 1 operatinq pressure of hydraulic circuit f mist s l‘ront /hc r-r/-iit /I,,( s.5~1’~~ lo fhc cf4I-r)ul /~r~~.~.s~ir~~ J.
Movement of the rack ( therefore, power operation ) is ensured by a change in pressure inside chamber 1, such
as
I Return of fluid to the tank -HP / 2 decreases
- Inlet of fluid -HP/ 2 increases

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 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. 510-00 : \m//l‘!yc~tl/ <‘,/I 0 t Ih<’ <‘It,< Ir.itnl iusrtlllnliritt Op. MA. 510-00 3
f 0 lO7i-l,‘1975 )
DESCRIPTION OF THE COMPONENTS
!ep. Description and Position Rep. ‘D escription and Position
1
Right hand sidelamp ...... 74 51
Flasher unit .. ....... 21
Front right hand direction indicator ..... 21 52 Lighting and starter switch .... .4 8’44- 61
2 Right-hand headlamp Main beam .. 78 5.3
76 54 Petrol gauge rheostat ........ 25
Dipped beam
Right hand window winder control switch
3 Right~hand horn ............ 42
( O/)liWlNl J ................. 51
4 Left-hand horn ...
41 55 Heating control illumination f ~///io~n/) .. 68
5 Left-hand headlamp : Main beam ....... 77 56
Left hand window winder switch ( O/JI~OII~/~~~
Dipped beam ...... 75 57
Heated rear window switch Op/io~nl j ...... 14
6 Front left-hand direction indicator ... 16 58
Lightinq switch unit ............. ........... 72
Front left hand sidelamp ................. 69
Speedometer and tachometer lighting
8 Electric fan thermal switch .................. 59
rheostat ....... ...... .................... 28 10
Electric fan .......
58 59 Instrument panel : 11
Starter ...... ... .............. .......... 3
Thermal voltmeter and illumination .. 26-28 12
Alternator ............................ ........ 5 13 Petrol gauge and illumination ............ 25-69
Ignition coil ... ......... .............. 61 14
Speedometer and tachometer lighting 28
High tension sensor ....................... 64
Clock and clock illumination ....... 1667 15
Compressor for horn ............ ..... ...... 43
Heated rear window warning lamp ....... 15 16
Compressor relay ................... ..... 43
Headlamp dipped beam warning lamp ... 75 17
Battery ............. .... .. 1
Brake pad wear warning lamp .......... 27 18
Voltage regulator ......................... 6
Oil temperature warning lamp ............ 35
19
HT sensor for No. 1 cylinder ........... 64
Coolant temperature warning lamp ....... 29 20
Distributor ..................... ...........
61 Emergency stop warning lamps 32” 34
21
Windscreen washer pump ............. 36
Hydraulic pressure warning lamp ...... 31 22
Plug for diagnostic operations ............. .65
Warning lamp for hazard warning.. ...... 17 23
Engine oil pressure switch .............. .. 34
Sidelamp warning lamp ................... 70 24
Idle cut-off ....................... .60
Direction indicators warning lamp ........... 23 25
Engine oil temperature switch ........... 35
Headlamp main beam warning lamp ... 77 26
Enqine coolant temp. switch ... 30 60 Left-hand control panel : 27
Top dead centre sensor ........................ 64 Direction indicator and hazard warning 19 28
Reversing lamp switch ........................ 8
- Horns .................................... 41 30
Window winder control relay( Optior~nl ) .. ..4 9
Windscreen wiper motor ............... 38-39 31
Heating relay ............ ..................... 45
- Windscreen washer pump .......... . .......... 37 32
Electric fan relay ................................ 58 61
Rear right-hand lamp cluster 33
Front right-hand brake unit ................. 28
- Rear lamp ............................................... 73 34
Windscre,en wiper motor ........................ 38
- Stoplamp ............. .....
............ 53
35
Blower motor ............ .............................. 45
Direction indicator ................................... 19 36
Hydraulic pressure switch ...................... . 32
- Reversing lamp ..................................... 9 37
Stoplamp switch.. ......................................... 53 62
Boot lamp ................................................. 12 38
Fuse boxes ..... 8-44-45-49-69-72 63 Rear window heating element ................... 14 39
Front left-hand brake unit .......................... 26 64
Right-hand number plate lamp ................. 72 41
Front right-hand door switch ................... 11 65
Left-hand number plate lamp ................... 70 42
Right-hand window winder motor f Optiollal) 51 66
Boot lamp switch ........................................ 12 43 Glove box
lamp ...................................... 51 67 Rear left-hand .lamp cluster 44
Front left-hand door switch ........ .......... 10 - Rear lamp ................................................ 71 45
Left-hand window winder motor (Oplio~fll) 47 s Stoplamp ........................................... 52 46
Interior lamp ................................................. 10
- Direction indicator lamp ..................... 18 47
Cigar lighter and illumination ............... .13-67
- Reversing lamp .................................... 8 48
Accessory plug ..... ... .......................... .... 50
49
Ashtray illumination ,., ... ................ 66 DESCRIPTION OF THE WIRING HARNESS
lot marked :
Front harness co Compressor harness AR
Rear harness C Boot harness
M Engine harness PC
Boot lid harness LG
Window operation D Fault finding harness ( Diagnostic) TB
Instrument panel harness FV Flying lead

Downloaded from www.Manualslib.com manuals search engine TABLE OF FUSES
Supply to
eater unit relay Fuse
Circuits protected
Rating Colour
16 Amps Mauve Heater unit
S toplamps
Accessory terminal
Glove box lightinq
Positive terminal
of battery u + )) 16 Amps Red
E Direction indicators
Ignition Windscreen wipers and washers
switch Horns
Heater relay windinq
Window-winder relay winding
Rheostat -speedometer lighting
Warning lamp panel ( Battery
meter ( Thermal voltmeter-- Brake pad wear warning
lamp - Fuel gauge - Oil pressure warning lamp -
Hydraulic fluid pressure warning lamp-Water temp.
warning lamp )
16 Amps Green Interior lamp
Boot lamp
Cigar-lighter
Clock
Hazard warning lamps
E Voltage regulator
Iqnition Reversing lamps
switch
Rear window heating element
Handbrake warning lamp
Window winder relay 16 Amps White R.H. Switch 0 R.H. window winder
L.H. Switch- L.H. window winder
Lighting
Switch 10 Amps Yellow Ashtray lighting
Cigar lighting
Heater controls lighting
Instrument panel lighting Clock
E Battery meter
Odometers
Sidelamp warning
L.H. sidelamps, front and rear 1 amp
Lighting
Switch 10 Amps Blue R.H. sidelamps, front and rear
Number-plate lamp CIRCUIT DIAGRAM
>
P.T.O.

Downloaded from www.Manualslib.com manuals search engine OPERATION N” MA. 510-00 a : Arrnr~g(,v~ ('I, I 0 / Ih CJ c~lvclric-cil irtslnllc7liori Op. MA. 510-00 a 3
(I.‘1975 -7 1975 J
-
den{
lark
i
6
8
9
0
1
2
3
4
5
6
7
8
9
!l
!2
!3
!4
!5
!6
!7
!8
$0
)l
12
33
34
35
36
37
38
39
41
42
43
44
45
46
47
- DESCRIPTION OF COMPONENTS
Description and Location
‘ront R.H. sidelamp ................................... 74
‘rant R.H. direction indicator .................. 21
1.H. headlamp main beam ................. ..... 78
dipped beam ... .................. 76
3.H. horn 42 .............................................
,.H. horn ....................... ............. ............. 41
,.H. headlamp main beam .......................
77
dipped beam .................... 75
‘rant L.H. sidelamp .........
........................
69
:ront L.H. direction indicator .................. 16
I.T. sensor ............................................ 64
qnition coil ..............................................
61
3lower
motor .........................................
58
;tarter ...................................................... 3
Alternator ..................................................... 5
Xstributor 61 ...................................................
7lectric fan thermal switch .........................
59
Zompressor for horns ................................. 43
Compressor relay ..... .................
.............. 42
3attery ........... ...............................................
1
Joltaqe regulator ....................... ............. 6
Nindscreen washer pump ............. ............... 40
jacket for fault-finding ( diagnosfic) ....... 65
3il pressure switch .... ....................... ... 34
:dle cut-off ........................................... 60
3il temperature switch
35 .............................
Coolant temperature switch ....................... 30
T.D.C. sensor ......................................... 63
Switch for reversing lamps .......................... 8
Relay for window winder ............................. 49
Relay for heater unit 45
................... ..............
Relay for electric fan 58 ..................................
Front R.H. brake unit 28 ...............................
Windscreen wiper motor .............................. 38
Blower motor ................................................ 45
Hydraulic fluid pressure switch ................... 32
Stoplamp switch ........................................... 53
Fuse box ..... .................... 8-44-45-49-69-72
Front L.H. brake unit ........................... ... 26
Front R.H. door lighting switch ... ............
11
R.H. window-winder motor .......................... 51
Glove-box lighting ....................................... 51
Accessory terminal ......................................
5c
Lighting for pneumatic oil gauge .............. 3:
Front L.H. door lighting switch
.................. I[ L.H .
window-winder motor ........................... .47 DESCRIPTION C
No identification
AR
M
LG
TB
co
Front harness
Rear harness
Ynqine harness
dindow-winder harness
Instrument panel harness
Compressor harness jent.
/ark
4”9 50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
iz
67
68
69
70 Description and Location Central interior lamp ............ 10
Cigar-liqhter and lighting
.............. 13-66
Ashtray liqhtinq ...................................
67
Handbrake warning lamp flasher unit
........ 15
Switch for R.H. window-winder
.............. 51
Switch for L.H. window-winder ................ 47
Flasher unit .............................................. 21
Anti-theft switch ......................... 4-8-44-61
Rheostat for fuel qauqe ............................ 25
Switch for interior lamp ... ....................
9
Switch for heated rear window ...................
14
Liqhting for heater controls ..................... 68
Contact for handbrake
............................... 115
R.H. control unit ( liqhtinq )
................... 72
Lighting rheostat for tacho. and speedo.
28
Lighting for intrument panel ................ 68-69
Tachometer
............................................ 64
Battery meter (thermal voltmeter )
.......... 26
Fuel gauge unit
..... ....... ....... ................ 25
Lighting for odometers
....... ......... .......... 28
Clock and lighting ................................ 24-67
Warning lamp for heated rear window
15 .......
Warning lamp for dipped beam 75
_, .................
Warninq lamp for brake pads ................... 27
Warninq lamp for oil temperature
............ 35
Warning lamp for water temperature
.......... 29
Red u STOP 1) warninq lamp
............... 31-33
Warninq lamp for hydraulic fluid presssure 31
Warninq lamp for hazard warning
17
...............
Warninq lamp for sidelamps .................... 70
Warning lamp for direction indicators ...... 23
Warninq lamp for main beam ................. 77
Warning lamp for handbrake
..................... 16
L.H. control unit
Direction indicators and hazard warning lamps .........................................................
19
Horns .......................................................... 41
Windscreen wiper motor ....... .................. 38
Windscreen washer pump .......................... 40
Rear R.H. lamp cluster
Sidelamp ...................................................
73
Stoplamp ....................... .............................. 53
Direction indicator ......................................
19
Reversing lamp ....................... .............
9
Boot lamp ................................................... I2
Heated rear window 14 .....................................
R.H. numberplate lamp ...............................
70
L.H. numberplate lamp ...........
.................... 72
Contact for boot lamp .............................
12
Rear L.H. lamp cluster - Sidelamp
........ 71
,- Stoplamp
.......... 52
- Dir. indicator .. 18
- Rev. lamp ......... 8
IG HARNESSES
Boot harness
Boot-lid harness
Diagnostic harness
Handbrake harness
Flying lead

Downloaded from www.Manualslib.com manuals search engine 2 OPERATION No MA. 510-00 b : Arratzgement of the electrical installation
( jhrl 9/1975 ) TABLE OF FUSES
Supply to
lelay for heater unit
‘ositive battery
erminal (( + 1) Fuse
Circuit protected
Rating Colour
16 Amps Mauve Heater unit
Stoplamps
Accessory terminal
Glove-box lighting
E Direction indicators
Windscreen washers and wipers
Ignition Horns
switch Winding for heater unit relay
Winding for window-winder relay
16 Amps Red Rheostat
- speed0 lighting
Instrument panel : ( Battery meter
( thermal voltmeter ) - Brake pad
wear warning lamp.-Fuel gauge- Oil pressure and temp.
warning lamps - Hydraulic fluid pressure warning lamp-
Coolant temp. warning lamp )
Interior lamp
Boot lamp
Cigar lighter
Clock
16 Amps Green Hazard warning
E Voltage regulator
Ignition Reversing lamps
switch Heated rear window element
Handbrake warning lamp
Relay for window
winder 16 Amps White R.H. switch u,R.H. window-winder
L.H. switch - L.H. window-winder
Lighting switch Ashtray lighting
Lighting for cigar-lighter
Lighting for heat’er control
Clock
10 Amps Yellow
Lighting for Battery meter and
instrument panel
E. Odometers
Sidelamp warning lamp
L.H. sidelamps front and rear
10 Amps Blue R,H. sidelamps front and rear
Number plate lamp Cl RCU I T DI AG RAM