hydraulic Citroen CX 1981 1.G User Guide

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OPERATION No MA. 02 : I!‘orki//g OI/ hyc/rt/t/lic s\,s/vN/.
5. PRECAUTIONS TO BE TAKEN BEFORE WORKING ON THE HYDRAULIC SYSTEM :
a) (.~rvJuI/)~ CIVOII the area of work, the unions and the unit to be removed
Disconnect the lead from the negative terminal of the battery
Only use petrol or lead-free petrol for cleaning.
b ) I~~J/VNSO
the /)twsure in the circuits
- Place the vehicle in the G /arc B
position. stop the engine.
- Slacken the Pressure Requlator release screw.
Wait until the front of the car has reached the low position 6, PRECAUTIONS TO BE TAKEN DURING REMOVAL :
a) t3lnuk o!! the w~~tnl pi/~es with plugs, and rubber tubes with round pins of the correct diameter
b)
t3lmk of/ //IV op,c,/li,lg.s of components with pluqs of the correct diameter
NOTE : Plugs and pins must be carefully cleaned before insertion. 7.. CHECK OR TEST OF HYDRAULIC UNITS :
- Use 3654-T t~sf hc~~c-h equipped and designed for use with LHM fluid
This bench is /)ciitltc’d ~IY’~‘~/ and its accessories are marked in green.
- Never use the bench with another fluid or for testing components operating with another fluid (units of a (( D ))
car using LHS2 for instance ).
NOTE The (< Le Bozec )) pump used on test benches for checking DIESEL injectors can be resorted to for
testing components operating with LHM mineral fluid provided that the bench is cleaned first. 8. PRECAUTIONS TO BE TAKEN DURING REFITTING :
E steel pipes must be blown through with compressed air,
5 rubber tubes and joints must be washed in petrol or white spirit and then dried with compressed air,
= hydraulic units must also be cleaned with petrol or white spirit and blown through with compressed air.
NOTE Renew all joints and seals during refittinq .
b
) 12rlbrijicntim :
- Follow the indications as stated in the operations in the Manual..
- Joints and internal parts must be liqhtly oiled hefore fitting ( use mineral fluid LHM only )
L If parts in contact with hydraulic units have to be qreased use a mineral grease only ( as employed for
Cardan shafts or bearings ).

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 02 : I+ 4’ 0, “‘g 01, Ill<, l1\~c!).ollli(- s\‘sfell~. Op. MA. 02
I To connect a union proceed as follows :
- Position sleeve-seal (( a u lightly coated with
L,HM fluid; this sleeve seal must not reach the
extremity of pipe (( b )).
- Centre the pipe in the housinq by lininq it up
with the axis of the hole, avoidinq all stress.
( Ensure that the end u b )I of the pipe enters
into the smali bore C< c )> j.
Start screwing in the union nut by hand.
- Tiqhten nut moderately : excessive force could
cause a leak because of deformation of the pipe
NOTE Tiqhteninq torques :
3.5 -mm pipe t 5.8 to 6 6 ft lbs
4 5 mm pipe 5 8 to 0 mN ( 0.8 to.0 9 ‘1 kg )
6 6 to 8 0 ft.lbs
6. O-mm pipe
1
9 to 11 mN (0 9 to 1 1 m.kg ) c ) Fittilzg :
I Only use joints of a quality compatible with LHM mineral fluid.
The design of the various seals ensures that their sealing action increases with fluid pressure The oiltiqhtness e
is therefore not improved by greater tiqhtness of the unions
2 To connect a rubber tube a rubber rinq of suitabie diameter has to be positioned between thr, tube and the hose
:
E clip.
0
x
a
A 9, CHECKS ON COMPLETION OF WORK
On completion of work on hydraulic units or the system itself check the followinq :
h) ‘1’11~ C./CJ~~~IIC-C, I~c,lrt,c,c,rt I/J<
pipvs : pipes must not touch one another or any other component, nor may any other
unit, whether fixed or movable, exert any stress on them.

Downloaded from www.Manualslib.com manuals search engine 2 OPERATION No MA. 03 : I~grhdicwts prdcomis&.
II. CLEANSING PRODUCTS
-
USAGE PRODUCT
R insing LHM hydraulic
Pi
ping
D egreasing of mechanical
a: ssemblies, when cold
oint face cleanser
‘leaning of carburettors CHARACTERISTICS
I MANUFACTURERS.
I
TOTAL
Hydro-rincage
MAGNET 6
OIL AND GREASE
REMOVER
PROTOLAN 3 D
RAVITOL X
MAGSTRIP
SUPER-CLEAN
Carburettor cleaner
P.D.R.
Carbuclin For a thorough rinse, leave the
product in the circuit for 1000 km
(600m) TOTAL
C.F.R.
Insoluble, in water, dries rapidly
has high insulating qualities MAGNUS
Let the product act
(undiluted in solvent ) then
rinse with water MULLERANDCO
Is used undiluted and must be
rinsed with water
Gelatineous liquid for removing
liquid gaskets and non-metal
gaskets Ets N BREGER
Ets RAVICOLOR
MAGNUS
Dry cleanser to be used before
application of Loctite products COMET
Department D.A.V.A. /
III. SEALING PASTES.
PRODUCT
PROTO-JOINT
CURTYLON
LOWAC
FRENETANCH
FRENEBLOC
FORMAJOINT
SILICOMET
noir
(blark ) CHARACTERISTICS
Resist mechanical stress, and
oil-derived products MANUFACTURERS USAGE
JEAN - BRASSART
CEFILAC
Department Joint Curty Clean with alcohol -
Resists hydrocarbons
SEBIS
Locks and seals any assembly
which is screwed on, but must
remain removable Sealing of joint faces,
screws, studs and nuts
Locks and seals studs, screws
and nuts with maximum
effectiveness COMET
Department D.A.V.A.
NOTE : These five
products are available as
a kit, with in addition
SCELBLOC (to be used
when securing bearings,
bushes etc.. ) and SUPER-
CLEAN (cleansing pro-
duct ) Seals joint faces and unions
Seals joint faces, as replacement
of ordinary gaskets
Sealing of door and wind-
screen sealing rubbers

Downloaded from www.Manualslib.com manuals search engine TORQUE CONVERTER
I. CHARACTERISTICS
- Torque converter with incorporated disc clutch. Make FERODO ( VERTO system ). Type 697 ( CX 2200 )
or 693 ( CX 2400 ).
_ Clutch engagement and disengagement are controlled by a hydraulic system with an electro valve unit
I This electro-va,lve is itself controlled by an electric switch operated by the gearbox selector shafts.
- Conversion ratio of converter 2 30 1 ( 697 type )
2.20 1 ( 693 type ) II. SPECIAL FEATURES
Adiustments :
- Contact gap in electric switch unit ,controlling the electro-valve
NOTE The gap for the 2nd/ 3rd gear contacts must only be adjusted once the selector shaft stop-screws have
been adjusted ( See Op. MA. 330-00 ),
- Gap at 2nd/ 3rd gear contacts 0 8 to 1.1 mm
- Gap at lst/ Rev. gear contacts ’ 13+02mm
. . . . . . . . . . . . .._.......
- Operating pressure for the converter oil system c /)IIv//~ ~c,I//v/I J :
- at 700 rpm 3.5 bars ( 51 psi ) min
_ at 2000 i A00 rpm 5.5 bars ( 80 psi 1 min 1
Oil l,c~~~i/~~~i’NItrrc~ 80: (.
- at maximum revs .,......... 10 bars ( 145 psi ) ( II./IN/<‘I (‘7 /h(, I<,ml,(a,‘flt~ro )

Downloaded from www.Manualslib.com manuals search engine 6 OPERATION No MA, 390.00 : C1 ,ararteristics
ad special fratuws oj the source
apfd rescr7,e o/ pressur(~ - Hydraulic system.
PRESSURE REGULATOR
MAIN ACCUMULATOR
Main occumulotor 7 Spring cup
O-ring 8 Cut-in spring
Spring base plate 9 Spring plug
Spring housing 10 Spring adjusting shims
Cut-out spring 11 O-ring
Spring odjusting shims 12 Snap ring
CHARACTERISTICS
Pressure regulator with pilot slide-valve :
- Cut-out pressure . .._......,_....____.............,.,......................................... 170 f 5 bars ( 2466 !I 73 psi ) _ Cut-in pressure __.....___.__.,..,.....,..,................,,...................................
145 + 5 bars ( 2103 + 73 psi )
Main accumulator :
- Capacity . . . . 0.400 litre ( 0.70 pints )
- Mark on filler plug . . , 62
- Calibrated pressure C /or checking purposes ) 62 + 2 bars (899 f 29 psi )
- 10 - 145
SPECIAL FEATURES
Pressure regulator :
- Thickness of adjusting shims . 0.30 mm
- For cut-out ..I.._......._..... .._. ,. .._. .:.. ,. ,. ..__.. ,. ..__ ,. ,. ._ ._.. .___ 0.30
mm
- For cut-in .._.... * .__....._._.,.,.,._.,....................................... 0.30 and 0.70 mm
- One .30 mm shim brings about a change in pressure by . . . . . . . . . . , approx. 3 bars (44 psi 1
- One .70 mm shim brings about a change in pressure by . . . . . . . . . approx. 7 bars ( 102 psi )
Ti$ttening torques :
- pressure regulator fixing Screws . . . . .._.__.....__._............................... 1.8 daNm ( 13 ft.Ib )
- Main accumulator ..,.. ,. . . ,. __ . . . . .._. ., ,__. ._ __ 2.5 to 4.5 daNm ( 18 to 32 l/2 ft.lb )

Downloaded from www.Manualslib.com manuals search engine 10 OPERATION No MA. 390-00 : Churarteristics and special features oi the source
and reserlv oj pressure - Hydraulic system HYDRAULIC SYSTEM SUPPLY DIAGRAMS
1. Supply diagram :
a) Manual steering vehicles :
HP supply
1
Safety ~ Front suspension
va1ve \Rear suspension valve /
1 Rear brakes
Front’ brakes
b ) Power stesritzg vehicles :
HP supply
I
- Brake accumulator - Brake
valve -S
upply to front brakes
I
3-way T ’ Supply to steering governor
Safety talve yw Front suspension
A Rear suspension - y”,;“,“,’ L supp1y to
rear brakes
Steeiing
( Supply to control slide valtv a?zd operating cylirzder J

Downloaded from www.Manualslib.com manuals search engine HYDRAULIC SYSTEM SUP.PLY DIAGRAMS
Source of pressure
I
h-Front suspension
Safety “‘lve ; Rear suspension
I
I Brake valve
i :ure limiter-
1
Front brakes Rear brakes
Source of pressure
I
Brake cccumulator
Supply to
I-way wion - steering governor
/Front
Safety va1ve- Rear suspension
I
Steering ( supply to slide-valve and operating cylinder )

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 390-00 : (.hnrncteristics a?zd special fc~atuws oj the SOIUCC
arld ~~~scrm~ o]~prc’ss~~rc - Hydraulic systrm
2. Aisembly diagram : Op. MA. 390-00 13

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 390-O : ChrckinR thr bydraalir co’mponcnts on the u&i& f Manual stcprine r~ebidos t Op. MA. 390.0 1
CHECKING’THE HYDRAULIC COMPONENTS
NECESSARY EQUIPMENT
- 1 pressure gauge A,
0 - 250 bars ( 0 to 3650 psi )
_ 1 3-way union B (No 5 416 494 K 1
- 1 pipeC (DX 394-185 ) ..
- 1 plug D ( 2 female ends 4 1.25 and 6 9 X1.25) = =
- 3 plugs E (mole ends : r$ 8 X 1.25 ) =
- 1 plug F (
mole 4 = 9 x 1.25 1
NOTE
: Plugs D, E md F are part 01 fhe kit
sold snder number 3657-T.
PREPARATION 1.
First ensure :
- that hydraulic reservoir filter is clean.
- that hydraulic fluid is ot normal running tempe-
rature ( Carry 0~1 a road lent first i/ vt4icie
is
mid ). 8 2. Draining the circuits :
Place manual height control lever in ion, posirios,
Slacken pressure regulator bleed screw ( 1 ). 3. Fitting pressure gouge A :
Disconnect the tube (2) HP outlet from pressure
regulator.
Connect the following assembly into the circuit :
pressure gaoge A, 3way union B and pipe C
between pipe ( 2) and the pressure regulator.
This ass~nzhly mrtst remain in positioa /brougbo~~l
the test. IMPORTANT :
The testing kquance described below must be
followed.
If after the test, a component appears defective,
either replace it or repair it before proceeding
to the next test.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 390-O : Checkin
P the hydraulic componm~s on the ucbicle Op. MA. 390-O 3
f Mama sleeting wbi&s I
6. Checking the safety valve :
=I
bl
Cl
dl
Remove safety v&e fixing screw ( 1 ).
Remove from safety valve :
supply pipe for front suspension (2 ),
- supply pipe for rem suspension (3):
Plug openings of safety valve ( pIugs E J.
Tighten pressure regulator bleed screw
and
start engine.
Disconnect rubher overflow return pipe and
watch aperture ~a>> of safety valve.
- I/ Iherr is a slight c7moa,,t 0, sHymge thr
sa/cty ~dve is s in good ordrv n.
el
-If thrr~ is a discharge of fluid the sniw
dw must be rqlacrd..
f ) Slacken pressure regulator bleed screw-
Conned overflow return pipe to safety valve.
Secure safety valve ( screw (( 1 a) 1.
7. Checking the safety valve slidevolve :
a) Remove plug from rem suspension outlet on
safety v&e at G b >a.
b ) Disconnect contact breaker lead on coil and
turn engine using stmter : fluid should start
to run through the opening a d N when pressure
reaches
1lLl +o 130 bars ( 1585 to 1885 psi )
c) Slacken pressure regulator bleed screw.
Connect contact breaker lead.
d ) Plug safety valve opening u b )) (plug E ).
8. Checking the hydraulic brake contml :
m ) Tighten pressure regulator bleed screw.
b) Start up engine.
When cut-out takes place wait a fen: seconds
for the pressure to stobilize.
Stop engine%
Watch pressure gauge and note the pressure
drop in the next 3
minutes. If pressure drop
exceeds 10 bors*( 145 psi ) repeat the test.
If the re< is the same. the broke control
valve is defective : change it.