1980 SKODA 120 LS Workshop Manual

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t'91

tificotion
number, or in
words. For exomple
Mobiloil 30 is on oil in the SAE 30 viscosity
closs, Mobiloil Speciol belongs to the SAE
10 W/30 closs. We quote
the viscosity closs
symbol of oils identified
in this woy in brockets
following the oil brond (trode
nome).
Oils designoted by o doubled viscosity closs
symbol ore the so-colled multigrode oils. Their
complionce with viscosity clossificotion is ex-
pressed by the symbol before the froction line
progressively to the clossificotion expressed by
the symbol behind the froction line. Thus,
for
instonce, the SAE 10W/30 oil hos the properties
of the sAE 10w, sAE 20w120,
ond sAE 30
closs.
Czechoslovok oils
Motor oil M6 AD (SAE
30), M4AD (SAE
20W/
20), Mogul Super SAE 20W50,
Mogul Speciol
SAE 2OW/30
Modit Oil SAE 30 (M6
AD), Modit Oil SAE
2OWl2O (M4AD), Modit Oil Speciol
SAE 10W/
30, Modit Super SAE 10W/40
Foreign oils
Agip: Agip F. 1 Motor Oil HD SAE 10W/20,
2OWl30, 4Ol5O; Agip F. 1
Super Motoroil
10w/40,20wl50
BP: Energol HD SAE 40, 30, 2OW (2OW|?O),
10W; Super Visco-Stotic 10Wi30, 10W/40,
20wt20
Costrof : Costrol 40,
30, 20Wl2O, '10
W; Costrolite
(SAE 10W/30), XL (SAE 20W/50);
GTX
(SAE 10w/50)
Mobil: Mobiloil 40, 30, 2OWl2O,
10W; Speciol
(SAE 10W/30); Speciol 20W/50; Super (SAE
10w/so)
Shef l; X-100 40, 30, 2OWl20,
10W; Super (SAE
10w/so)
Other oils of foreign moke con be used if equi-
volent to the listed bronds, for
exomple, Avio,
Esso, Heno (Optimol
LD), INA (Delto TLX),
Noftogos (Golox GTX, Omnio) etc.
GEAR OILS -
type E. P. (high-pressure)
I Viscosity j Ambient
Lubricoting noint
I closs
! temperoture
sAE 140*) -r50
to +15 oC
Georbox/f inol
drive SAE
90
*35 to -15
oC
* 5 to -30oC
SAE 80
teering box SAE 90 throughout
the yeor Czechoslovok
oils
PP 90 (SAE
90) geor
oil; PP 80 (SAE 80)
geor oil
Foreign oils
Agip: F. 1 Rotro 140; 85/90; 75Wl8O
BP: Geor Oil 140
EP; 90 EP; 80 EP
Costrol: Hypoy B 140; B 90; B 80
Mobil: Mobilube GX 140; GX 90; GX 80
Shell: Spirox E. P. 140; E. P. 90; E. P. 80 W
Other geor
oils of foreign moke con be used
if equivolent to the listed oils.
SPECIAL OILS
Distributor beorings (service inspection)
Czechoslovok moke -
ON 1 low'pour-point oil
Foreign moke -
for exomple, Shell Clovus 17
ond similor oils
GREASES -
use throughout the yeor
Woter pump
Czechoslovok moke -
SP 4 sooP greose,
NH 2
or A4 motor greose
Front wheel beorings, geor lever
brocket
Czechoslovok moke -
SP 4 or NH 2 soop greose
King pins
Czechoslovok moke -
A 00 motor greose
Inner door mechonisms, locking mechonisms
Czechoslovok moke -
SP 2-3 soop greose*)
Clutch releose beoring
Czechoslovok moke -
SP 4 or NH 2 soop
greose* )
Steering tinkoge boll
ioints, cronkshoft
beoring
Greoses listed in the porogroph
on greoses
of
foreign moke
Greoses of foreign moke:
Agip: F.1 Greose 30; BP: Energreose L2; Costrol:
Costroleose l. M.; INA: Automost Speciol;
Mobil: Mobilgreose MP;
Shell: Retimox A,
ond other greoses
equivolent to
the listed
ones.
BRAKE FLUID
To SAE J 1703C Specificotion
ln Czechoslovokio -
SYNTOL HD 190 broke fluid
Abrood -
SYNTOL HD 190, Pentosin
Super Fluid,
Mobil Hydroulic Broke Fluid, ATE Blou, BP
Broke Fluid, STOP SP 19
r) Greoses of foreign moke should be preferred.
220
*)
Not used
in Czechoslovokio

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'6'a'(o1>1o^olsoqcazC u!) SfZSSUJIINV

I-
.'t Fig.
15.3/3 -
Oil Filter
oil f ilter bowl
witlr f ilter
element
centre-boll oil pressure
switclr pressure
oir. When driving often
on dusty roods,
ihe cleoning intervols
should
be shortened by
holf. For oir cleoner mointenonce in tropicol
re'
gions refer to
ChoPter 16.2.
Air Cleoner -
winter oPerotion
Remove the rubber
cop from
the cover exten-
sion orm ond
use it to stop the mouth of
the
orm. Fit o guide extension into
the cleored hole
in the ornr ond
insert the
corrugoted poper hose
(included in the
cor equipment) into
the
ex-
iension ond
the holder on the
intoke ond
ex-
houst monifold.
Give the
hose the required shope by
bending
it slowly ond corefully. Above
oll, ploce
it into
the holcier so thot
there is
o suff icient distonce
(wide enough to
insert o
finger) between it
crnd the exhot-tst monifold.
Tightening of
cYlinder heod bolts
The cylinder heod
bolts should be tightened
in the running-in period before
the gosket gets
settled ond then
ofter every replocement of the
gosket, i.e., ofter
obout 1,000
kilometres' For
itre tightening procedure,
s9e
Chopter
-2'16'
Check'ilg of vilve
cleoronce ofter
every tighten'
ing of tlie
cylinder heod
is o
routine procedure
which must not be omitted.
Volve Cleoronce
For checking procedures
ond odiusting volues,
refer to ChoPter 2.13.
Alternotor V'belt
Tensioning
Loosen the
nuts of the bolts
in the olternotor
f longe (fostening
it to
the engine ond
the strut)
ond'of itre
bottJ holding down
the strut on
the
olternotor, ond
swing
oside (tip)
the olternotor'
Adiust the
belt so
thot it gives
woy 10- to
15 mm midwoy between the
belt pulleys
when
depressed lightly (ot
if o- weight of obout
2 kg were opplieal with
the
finger ot this point'
LoCk the
olternotor in
this position
by tighten-
ing properlY
oll the nuts.
Belt dimensions: 9x9.5x1,0O0 mm.
To Cleon the
Distributor
The contoct breoker points, the
cover, ond
the rotor orm
of the distributor must never
be
greosy or dirty. Scrope off
ony burns on the
distributor cover.
lf you hove
cleoned the
distributor with
oetrol, do
not ref it the cover till ofter
the petrol
hos comPletelY evoPoroted.
222
oll
the greose
into the beorings. Tighten
the
cop thoioughly so
thot it connot be worked
loose by vibrotion.
Air Cleoner -
cleoning ond
replocing of
filter
element
Unclosp the cover
fostening clips
and lift
owoy the lid. Depress the
cross broce in
the
1ock6t, rotote
it
slightly to disengoge it, ond
withdrow the filter
element. Wipe
cleon the
inside of the
iocket, cleon
the filter
element or
reploce it with o new
one, ond reclose the oir
cleoner proceeding
in reverse order.
Shoke ond
top the filtet element to
rid it of
clirt porticles, oncl
blow it off ond through with
Fiq.15314
-
Lubricotor of
Woter Pump Beorings

ezz
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1o;ceds o d1.rp
puo
6ulsnoLl lolnq!rl
-s!p aql
to tuolloq
eql uorl
lloq aql
e^otuer
'uollcedsug ec!^Jas o .to
tlode.r o 6u1rvto1;o3
'(tuo11oq rolnqlrls!p eq] u! oloq orlt
q6no.rq1 tno ivrol,
lllrvr l!o snld.rns)
ap;d :e1oa:q
tcDtuoc eql
ut eloq eql q6no.rql pallddo
l!o lo
sdo.rp engl ol rnol qllr*
6u!snoq rolnq!rls!p oql
u! loJluoc 6u1tu11
;o6n;;lluac eq] elDc!rqn-l
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qllm ro ('cte 'V
xDulleu lleqS) alo141 u61ero1
1o
sesoare -
z'gL.re1doq3 ees
-
esDor6 qrtr*
Petac
-lrqnl oq oslD uoc 'uoc
eql'6uo1o 6ugp;1s
r1a1
eq1 6u1pn1cug 's1u1od
asoqf '1u!l
loJluoc ulnncon
aql lo u1d eq1
puo
alpulds rolor aql (dorp
euo) 11o q11r*
A16u;.tods
loog 'Plotl
lllM ]lal aql
so 'ruDc
aq] aplsu!
llsl aql
Puo tuDc
aq1 6uo1o
6u;p;1s llel er{l
uo
llo qcnu
os dgtp puo 'r.u.ro
JoloJ eql PUD Je^oc
Jolnqlllslp
eq] a^oueu
rouqlrlslo oql elDclrqn'l ol

Fig.
15.3/8 -
Distributor Adiusting Elements
1 -
contoct holder, 2 -
rotor orm, 3- com,
4 -
distributor brocket, 5 -
distributor brocket
clomping bolt
Alwoys turn the engine clockwise to eliminote ony ploy
in the distributor drive geor
ond to
ovoid loosening of the bolt. To relieve the
com-
pression resistonce, it
is recommended to bock
off the sporking plugs.
b) Stroboscopic method:
When using this method, the volues of the
bosic ignition timing ond
the odvonce con-
trolled by the centrifugol timing control (for
its
diogrom refer to Chopter 13.5) should be odded
upwhile multiplying bytwo
the odded upvolues
occording to the diogrom. Any effect of the
vocuum control must be
eliminoted by discorr-
necting the respective hose (connecting
the
distributor vocuum unit with the corburettor).
The meosuring procedure
is indicoted by the
diognostic equipment itself.
To Adiust ldling Speed
Use the oir-correction screw (speed
cor-
rection screw). The speed decreoses when ro-
toting the screw clockwise ond increoses when
rototing it onticlockwise.
Adiust the idling speed in occordonce with
the tochometer ond within the limits specified
in the following porogroph "To
Adiust ldle
Run". The engine must be wormed-up
before
storting the odjusting procedure (see
olso the
following porogrophs) ond its ignition must be
in perfect
condition (distributor
contoct-breoker
points, sporking plug
electrodes, ond ignition
odvonce).
N o t e : For the bosic position
of the odiusting
screw refer to Chopter 2.19 - "Mointenonce
ond
Adiusting". Fig.
15.3/9 -
Air-correction Screw -
idling speed
correction screw
To Adiust ldle
Run
Acljust the contoct-breoker point
gop,
the gop
of the sporking plug
electrodes, ond
the ig-
nition odvonce. Then check
the
volve cleoronce
(if there is no cleoronce, odiust
the
volves),
cleon the oir intoke filter
element, ond moke
sure thot the occelerotor pedol link hos
the re'
quired free trovel -
see Chopter 12.2-
Use o needle to remove the plug
covering
the fost-idling screw
ond let the engine run ot
obout 2,000 r. p.
m. to ottoin on oil temperoture
of 70oC. Insert the probe
of the thermonreter
into the hole for the oil diPstick'
Now connect the
speed indicotor (tocho-
meter) ond the onolyzer of
corbon
.monoxide
(contoined in exhoust fumes). Use
the oir'cor-
iection screw (Fig.
15.3/9) to set the
speed
-r-?n
at 800 l;; t.
p. ni. cnd the fost-idling screw
(Fiq. 15.3/10) to odiust the
content of corbon
moioxide to 2*0.50/s or the oir-fuel proportion-
by-weight mixing rotio,
comporoble with
the
specif ied corbon monoxide content, to
1+.2 +$.t.
After about one minute of
the continued idle
running recheck the odiustment ond
correct it,
if necelsory. Close the hole
with the
fost-idling
screw by driving in o
new plug with
its bottom
outword.
Note: For the bosic position of
odiusting
screws refer to Chopter 2.19 - "Mointenonce
ond Adjustment".
To Lubricote Accelerotor Mechonism
Pour severol drops of oil into
the end of the
bowden coble tubing ond lubricote both
ioints
(on top ond below)- of the corburettor pull-rod
itself with obout one drop of oil. Then
depress
224

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aql ul
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(puoq lanoc) a>1oA aqt
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0llt'91 '6!l

friction focing. lnodequote
ploy
results irr o too
short free trovel of the clutch pedol
ond on
olmost immediote clutch disengogement. Access
to the releose
cylinder con be goined
os de-
scribed in the previous porogroph
on clutch
lubricotion. Hold the rod protruding from
the
relose cylinder ond force
from it corefully the
releose lever, ogoinst which it is restingi
the
lever con be relieved by disengoging the ten-
sion (pull-off
) springs.
ln service, the forcing-off
must be ot leost
2 mm. Adiust it to 4
to 5 mm by odiusting the
length of the rod. After hoving
loosened the nut
on the rod
of the releose cylinder, rotote
the
releose finger to obtoin the correct rod
length.
Then retighten the nut, thus locking the releose
f inger in its position
on the rod.
lf the ploy
is correctly od justed,
the f ree
trovel of the
clutch pedol
pod should ronge
from 40 to 50 mm. lt should not be ollowed to
drop below '!0
to 15 mm. lf the described od-
justing procedure foils to bring the required
result, it is necessory to odjust the clutch
mech-
onism in occordonce with
informotion con
toined in Chopter 3.2.
Bleeding the Glutch Hydroulic System
The movement of the clutch pedol
is trons-
mitted hydroulicolly to the clutch releose cylin-
der. The couses ond symptoms of penetrotion
of oir into the hydroulic
system (similor
to the
broke hydroulic system) ore described in detoil
in the section deoling with brokes. The pro-
cedure of bleeding the clutch is the some os
wherr bleeding the brokes -
see Chopter 15.8.
Fig. 15.411-
Adiusting Elements of
Clutch
Control Mechonism
I -
releose cylinder rod, 2 -
releose cylinder,
3 -
releose lever, 4 -
bleed screw 15.5 GEARBOX
AND FINAL DRIVE UNIT
Checking Oil
Level ond Topping'up
Oil
Renrove the centre cover ol the
f loor boord in
the luggoge comportment behind the
reor seots.
Pull off the filler neck cop ond use
the dipstick
to check the oil level. With the diPstick inserted
into the neck up to its seoling ring, the oil level
should be obout 8 mm obove the upper line'
For this check, the cor
should be ploced
on
level ground.
After hoving topped up the oil,
woit obout 2 minutes (while
oil flows from the
georbox proper
into the finol drive ond its level
is stobilized), ond then recheck
its level-
Fig. 15.5/1 -
Tronsmission Unit Filler Neck
Fig. 15.512 -
Tronsmission Unit Droin
Plugs
ond Inspection Plug
1 -
georbox droin plug,
2 -
finol drive droin plug,
3 -
inspection plug,
4 -
switch of reversing lcmps
(except SKoDA 105 S)
ffi
;rt'i,*
tiiffi
ii.! i;
br'ill
226