1974 Citroen CX suspension

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 Slacken pressure regulator bleed screw.
Put manual height control in /VII. position
Disconnect front left-hand cylinder supply
pipe ( 1 ) from 3~woy union (2 ).
Plug 3-way union opening using plug E.
Repeat test as described in preceding parograpb.
If the front left suspension cylinder is defective
replace 01 repair it.
Remove plug E.
Fit supply pipe ( 1 ).
If after testing the front height corrector and the
left-hand front suspension cvlinder, the drop in
pressure persists, the front right-hand cylinder
is defective.
Replace or repair it. Il.
Checking the rear suspension :
Slacken pressure regulator bleed screw.
Put manual height control in IOU pnsi!ios,
Remove plug E.
Connect rear suspension supply pipe (?) to
safety valve.
Disconnect rear brake supply pipe (4) from
brake valve.
Plug oriilce of pipe using plug D.
Tighten pressure regulator bleed screw
Place manual height control in aorwnl rrruniug
posilio,,.
Proceed as for test of front suspension.
12. Slacken pressure regulator bleed screw.
Disconnect 3-way union B together with pressure
gauge A and pipe C.
Fit connecting pipe of safety valve to pressure
regulator.
Tighten pressure regulator bleed screw.

Downloaded from www.Manualslib.com manuals search engine III. CHECKING THE CAMBER ANGLE
NOTE : The camber angle is not adjustable.
1. Prepare vehicle and set in position f src chapfrrs
I and 2 ).
2. Setting up checking apparatus :
Place the apparatus on the magnetic support of the
wheel to be checked.
Use the axis corresponding to the blue mmu A..
Keep the level in a horizontal position. Tighten
locking screw ( 1).
3. Checking the comber angle :
IMPORTANT : Check that the reading Ll has not
changed ( SC<’ rhnprcr I ).
a) Turn the disc (2 ) until the fixed spirit-level
bubble (3 1 is centred.
b) Note in blur scnle (at o a n ) the reading of the
comber rmqle.
c ) Carry out the same operation on the other
wheel.
Comber angle must be between 0’ + 13’ - 29’
IV. CHECKING AND ADJUSTING THE,CASTOR ANGLE
IMPORTANT : For precise results from this check
it is imperative to set the vehicle heights as follows :
165 mm a+ front and 215 mm at rear f Salooss) or
228 mm ( Esfafes ).
1. Setting the vehicle height :
a) Check measurements Ll and L2 f see chapter I ).
b ) Release pressure in suspension system.
2. Setting control opportus :
3. Checking castor angle :
Place the apparatus on the magnetic bracket of
the wheel to be checked using the axis corres-
ponding to grren (ITTOII’ H.
a) Turn wheels 20’ outwards : to the left for the
left-hand wheel and to the right for the right-
hand wheel.
Keeping the apparatus horizontal tighten locking
screw ( 1).
b) Turn the disc ( 4) until the zaro mark is opposite
arrow (at I( b n 1.
c) Turn knurled knob ( 5) until spirit-level
bubble (6) is centred.

Downloaded from www.Manualslib.com manuals search engine SUSPENSION
OPERATION No MA. 430-00 : ( hnmrtcristics mrd spccinl jeatrrres oj /ha susp~~sio~~. Op. MA. 430-00 1
FRONT SUSPENSION
f
c
s
6
-E
J REAR SUSPENSION
I
,

Downloaded from www.Manualslib.com manuals search engine I. CHARACTERISTICS
..-.-..- --~~~
HEIGHT CORRECTOR
SUSPENSION CYLINDER ( All Saloon vehicles )
L.43-6
SUSPENSION CYLINDER ( Estate vehicles )
-- --.

Downloaded from www.Manualslib.com manuals search engine VEHICLE HEIGHTS 13454
- Front height measured from point SG a 8) of the subfrome. to the surface on which the vehicle is stondinq
_ Rear height measured from point (, b )B of the subfrome to the surface on which the vehicle is standinq Calibration pressures :
FRONT REAR
\// \~~lr~r,,i J v/xii
/c,.5 I:\lol,‘s
_ Identification mark on filler plug 75 40 35
- Calibration pressure ( /or rhc’rkiqg 1. 75 2 bars 40 2 bars
- 27 - 15 35 1 ;, bars
(1088 _ ;;, P51 1
(580 : ;;, P51 i ( 508; :',, PSP 1 Dampers
- They are incorporated in the pneumatic units
NOTE The front and rear dampers ore different on CX 2400 GTI vehicles and therefore the pneumatic units are PNEUMATIC UNITS :
Volume of front units i Soloor, mid I:s/fll<,s 1
500 cc f Pressed steel type )
Volume of rear units
i All Saloons 500 cc ‘j Pressed steel type)
Estates 700 cc (Screwed in type i
I
specific. Suspension cylinders :
Diameter of pistons ,,,, Height
corr&tors : Identical front and rear Anti-roll bar :
23 mm i lisfoir~s mid o/l Salormc <~,c,,,,, ( Y ‘Xl(i VII I
Diameter of front anti-roll bar.
i 24 mm , (. 2400 (.‘/I J
Diameter of rear anti-roll bar 17.5 mm
NOTE The rear anti-roll bar on Estates and on Saloons is different.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 430.00 : c ,,<,,a< ,<,r;s,;rs mi/ .s/wrin/ ,vn/srrs oi /he srmf~rw.~ion Op. MA. 430-00 5
II. SPECIAL FEATURES
Adjusting the anti-roll bars :
A, t/xv ,ms,
- Lateral positioning equal protrusion on either side to within 2 mm
- Anti-roll bar bearing preload 300 N ( 30kg) ( 66 lb )
- Lateral clearance of anti-roll bar. under pressure of 500 N i 50kq I( 110 fb i 0.2 to 1 mm
,I, l/X“ rcnr :
- Lateral positioning same thickness of shim on both sides. within 1 mm
- Shimming, if necessary. level with the split collars to within 0.6 mm
Greasing of the suspension piston con-rod ioint :
( Carried out with LHM liquid contained in the dust cover )
- Front suspension cylinder
- Rear suspension cylinder
Upper front wheelarm stops :
WARNING ‘,hc ,,,;,,,i<~, ~,op ,,,I (i, he ii,,, r/ 01 //I< ,,I?<,<‘/ wd. 7cm3
25 cm3
Tightening torques :
- Anti-roll bar link-rod on upper wheelarm. i Bush nut 3 doNm ( 21 11 2 ft.lb )
NYLSTOP nut 4.5 to 5daNd32 1/‘2to 36ft.lb)
- Link-rod on anti-roll bar 4.5 to SdaNm(32 1/2to36ft.lb)
. Screw securing front anti-roll bar bearing 2.7 daNm ( 19 l/2 ft.lb )
^ - Clamps for adjusting pie-load on front anti-roll bar 13 doNm ( 9 l/2 ft.lb)
b2 - 1.5 daNm [ 11 ft.lb i
0 Clomp for height corrector control
rod ( front and rem )
”
6 daNm ( 43 l/ 2 ft.lb ) - . An+iwroff bar 0” rear &&arm ( rear fixing
points ) I /nc<’ nvrl /hrcn,l~r &
- Rear anti-roll bar split collars :
cc
-5 Tightening torque for screw ( 1 )
according to width (e) of bearing :
:
2
e = 5 mm 8 d.aNm ( 58 ft.lb ) f -I’, I’JiS,
P
e-6mm lOdoNm( lOft.lb)i 121Vi-’
Fitting of the front and rear wheelarm stops using water
Fitting of the front anti-011 bar bearing shells using ,< TOTAL MULTIS I) grease.

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 )