1980 SKODA 120 LS Workshop Manual

L
i g)
Excitotion of the olternotor by o current
supply outside the cor is not permitted.
Agoin the semiconductors would suffer.
h) A blown chorging worning lomp must be
reploced immediotely with o new
one. Other-
wise correct excitotion of the olternotor is
not ensured. Use o new lomp of
the some
roting (or input), i.
e., 1.5
to 2 W.
i) Be sure thot there is
o perfect
electricol
connection on the connecting terminols ond
thot the olternotor
ond regulotor
ore properly
eorthed.
i) The
olternotor is oeroted, open. Therefore
toke core when woshing the cor thot woter
or cleoning ogents do not get
into it through
the venting holes.
Removing the Alternqtor
1. Disconnect the bottery.
2. Disconnect the olternotor leods. lt will be
helpful to remember the colour of one conductor
ond its connection for reinstollotion.
3. Remove oll ports
holding the olternotor on
the engine, ond lift owoy the olternotor.
Reinstolling the Alternotor
1. Cleon oll mounting surfoces.
For the olter-
notor mounting, see Chopter 2.3, por.42.
2. With the bottery
disconnected, insert the
conductors into the respective
connectors "M,,
ond "R"
(the conductors beor the some sym-
bols), ond fosten the remoining leod with o nut.
3. Reconnect the botterv. Alternotor
Disossembly -
Repoirs
1. Screw off the belt pulley
nut ond remove
the belt pulley
ond fon.
2. Lift the brushes with o hook proceeding
through the holes in the
commutotor end
shield
ond hold them in the lifted position
by wires
inserted into the shield through dio. 3 mm holes
under the terminols uM'
ond "Ru.
3. Mork the mutuol (relotive) position
of the
commutotor ond drive end shields ond seporote
the qlternotor
ofter hoving removed its clomping
bolts. The drive end shield remoins connected
with the stotor.
This disossembly will give
occess to the
brushes ond some
of the diodes. All other
iobs,
with the exception of the renewol of the beor-
ing, should be done by experts in speciolized
repcir shops -
see the note supplementing the
following porogrophs.
Alternotor Reossembly
1. Insert the circlip into the becring bore
in
the commutotor end shield.
2. Fit the drive end shield with beoring on
the rotor shoft.
3. Assemble the stotor with the rotor ond the
commutotor end shield. 4" Tighten the olternoior with clomping bolts
ond check the rotor for free rototion while
tightening the bolts.
5. Slip the spocer on to tlre shoft,
top the
key in position,
fit the fon ond belt pulley,
ond
tighten the entire ossembly using the nut with
spring wosher.
6. Pull out wires from the commutotor end
shield which hove been used to hold
brushes
in their lifted position.
Replocement of Beorings
The used beorings ore fullyclosed ond seoled,
ond they hove been filled in the foctory
with
lubricont to lost through their entire service life.
1. Pull the beoring off the rotor
using o suit-
oble puller.
When ref itting the beoring, press
it
on to beor on the shoft
collor-
2. Before removing the drive end shield
beor-
ing, f irst drill off the heods
of the flonge rivets
ond then drive the beoring out from
the outer
side of the drive end shield using o suitoble
mondrel (drift).
On reossembly,
close the beoring with the
flonge ond rivet the flonge to the shield.
Replocement of Diodes
The use of the removoble
diode block with
the individuol
corriers of the so-colled positive,
negotive, ond ouxiliory diodes, focilitotes con-
siderobly the replccement of ony defective
176
Fig.133la
-
Alternotor -
Sectionol View

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junction
with the olternoto,r occording to
Chop-
ier 13.3 ond mointoining
o constont voltoge of
tlre power
supply set within the
entire ronge
of
service speeds.
Tlre voltoge regulotor
is instolled orr the body
cross beorer, to
the right of the engine ond
beside the ignition coil.
To focilitote hondling
of its leods' especiolly
the occess to their
connections, it
is recom-
rrrended to remove the regulotor fostening
screws. For disconnecting procedures,
see
Chopter 13.3 "Alternotor
lnstollotion ond Gen-
erol lnstructions".
DK 1565
Fig.13.411- Internol
Wiring Diogrom of
Alternotol with
Voltoge Regulotor ond
Outer
Connections
Altenrotor: B, R, M -
olternotor outlets
f -
olternotor phose
windings
m -
olternotor field winding
D1,2,3, 4, 5, 6 -
moin diodes
D7, 8,9 -
olternotor ouxiliory diodes
D10 -
olternotor choking diode
Voltoge regulotor:
R, M, 15/54 -
regulotor outlets
reg -
regulotor tension winding
Rk -
boloncing resistor
Ro -
protective resistor
Rr -
odiustoble resistor
Kr -
regulotor contocts
Outer connections: K -
worning lomp (1.5
W)
S -
switch (switch
box)
B -
bottery
Checking Voltoge Regulotor
on Cor
The regulotor operotion con be offected by
loosened connections ond on imperfect eorth- ing.
lf the wsrning lomp does not go
o.ut when
driving, i. e., if it glows
ot increosed engine
speed brightly or dimly,
or if it does not stort
glowing ofter stopping
the engine ond
o new
iurning of the ignition key in
the switch box,
the voitoge regulotor
is probobly
foulty. Another
symptom of o regulotor
foilure is
o poor
chorg-
irrg of tlre bottery or its
overchorging.. lf there
is nothing wrong with the regulotor, check the
reguloted voltoge over the regulotor which
slrould reod 13.2 volts ot the
minimum ond 14.8
volts ot the moximunr. This check
in the
cor
is only tentotive ond only
o check on
the test
bench'con be considered os definite ond
bind'
i ng.
Electricol Adiustment
The voltoge regulotot- should be tested
ond
odjusted only on o test bench
in o connection
slrown in Fig. 13.412.
At o lood of some
2
onrperes, the checked
voltoge should correspond to
volues specified
in the column "Checking".
lf the checked volt-
oge is within the specified ronge, do
not odiust
the regulotor. Othenwise odiust it to the volues
specified in the column "Adiustment".
lf woter
evoporotes obnormolly from the bottery, odiust
the voltoge regulotor to the bosic volues of
"Adiustment" utilizing the lower section of
the
toleronce zone.
Fig.13.al2 -
Wiring Diogrom of
Regulotor Tested
ond Adiusted on
o
G -
olternotor
REG -
voltoge regulotor
A -
ommeter
V -
voltmeter
S -
switch
R -
lood resistor
B -
bottery DK
1566
Voltoge Test Bench
178

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Fig. 13.5i3 -
Vocuum Control Course -
opplicoble to both
regulotor models
copscrew fostening the distributor brocket to
the support on the engine (do
not loosen the
brocket clomping bolt).
Refit the distributor on the engine by
re-
versing this procedure. The
coupling on
tlre
shoft is osymmetricol ond it hos to engoge into
the heod of the drive shoft in the engine. To
seot properly
o new distributor
or o distributor,
the brocket of which hos
been loosened, refer
to Chopter 2.3, por.25
to 27.
Distributor Disossembly ond Reossembly
This should be done in speciolizedworkshops,
especiolly with regord
to the checking of the
mechonicol condition or o repoir
of the dis-
tributor. lt is recommended
to use o suitoble
holder for doing the moiority of the required
iobs in
o verticol position.
When reossembling
the distributor, lubricote
the sliding points
oc-
cording to Chopter 15.3
but bewore of over-
lubricotion.
Remove olso the copscrew
on the bottom of
the distributor housing ond drip some low-pour
point oil into the hole to increose the oil reserve
of the shoft
sel-lubricoting beoring -
see Chop-
ter 15.2 "Speciol
Oils".
Disossembly 1. Remove the distributor cop ond the breoker
orm.
2. Remove the coupling from the shoft (note
the relotive position
of the eccentric dogs ond
the breoker
orm).
3. Remove
the circlip from
the pivot
ond litt
owoy the breoker orm.
4. Remove
the subossembly
of the terminol
"1" (current supply to distributor).
5. Screw off the copocitor. 6. Screw
off
the retoining springs.
7. Lilt owoy the vocuum chomber (do
19t
open it, o chonge of the curve is on.improboble
d'efect; do not chonge the screw-in depth
of the
pull-rod).
' 8. Lift owoy the contoct breoker
bose plote
with pocking piece from
the housing.
g. Litt owoy the shoft with the
centrifugol
governor. -
10. lf necessory, disossemble further
the sub'
ossembly of the shoft with the centrif
ugol
governor (odvonce mechonism) ond
com.
l?;h.',0, ReossemblY
1. Reossemble the centrifugol governor
(the
weights must be free
to rotote on the pins).
2. lnstoll the reossembled shoft
with the res'
pective woshers into
the distributor housing.
3. Fit the contoct breoker bose plote
with the
f ixed contoct holder ond pocking
piece into the
housing. 4. Fit the pull-rod on
the pin
ond lock it in
position, screw down the vocuum chiomber with
the copocitor. Check the
ignition odvonce po-
sition for the first cYlinder.
5. Screw down
the retoining springs
with
shims (the
spring with
the dog opposite to
the
terminol "1"i;
the bose plote must
rotote freely
in the distributor housing.
6. Reosemble the terminol "1".
7. Fit the breoker orm
on
the pivot
ond lock
it in position. Adiust the contoct breoker point
gop (lift) ond check the
contoct
Pressure'
"
if. 'Stip
woshers on
the shoft in
the originol
sequence, slip on the coupling ond
lock
it in
position^ 9. Fit the lubricoting felt
into the hole of
the
com ond instoll the breoker orm.
10. Fit the distributor cop
in position.
11. Check the distributor operotion.
Checking A def inite indicotion of the condition of
the
distributor (during on operotionol check
os
well
os ofter o
repoir) con be obtoined by testing
the distributor on
o test stond with
o circulor
spork gop.
After o preliminory
odiustment of
the
contoc-t breoker point gop,
the stond is
used for
check i ng:
1. The contoct point
contoct ongle.
2. The spork ongulor distribution (with o
tol-
eronce of -+45
ongle minutes within
the entire
operotionol ronge).
3. The rongJ ond course of the
centrifugol
ond vocuum control. 4. The
operotion ot
moximum speed (length
of spork on spork goP -
4 mm) for o
brief period
(obout 2 minutes).
180
t
5
2tD zsa !l!
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rl
)
t
(I

I
I
I
s
I
I
I
t
(
(
t
l
,
t
T c
R
L D
v Ir
1' 2
3
orotely
(
screen the other one) . With lef t
directionol heodlomps,
the borderline deviotes
towords the other
side.
lf the heodlomps ore neorer to the woll thon
the soid
5 metres, decreose the meosure indi-
coting the
deviotion of the light ond
dorkness
bordeiline from the
height of the heodlomps
obove the ground in the
direct proportion to
the
decreose of
tfre distonce, for
exomple when
plocing the cor 2.5 metres
from the woll, de-
creose the deviotion bY holf.
Light proiections "A"
ond "B"
correspond to
the spocing of heodlomPs on
the cor ond they
hove the following dimensions:
Heodlomps, dio. 160
mm 1,030
mm
Duol heodlomps, dio.
130 mm 1,114
mm
Auxiliory heodlomps, dio.
130 mm 790 mm
When odjusting the heodlomps, the cor must
be empty ond the
tyres must be correctly in-
floted. Hologen heodlomps should
not be left
switched on for too long o period os they build
up heot if not cooled by heod-on
oir blost when
driving. For lhe odiustment of
heodlomPs ore intended
screws in their fromes. The screws
ore occess'
ible ofter the removol of the side ports
of the
grille. Remove the copscrews of the corners
ond push
the grille
oside.
Heodlomp Assembly
o) The fundomentol fostening
Port of
circulor
heodlomps is the
so-colled support plote
(rec-
tongulor plote)
ottoched to the bodywork by
copscrews with lock woshers. The
heodlomp
housing is bolted to this suPPort plote by bolts
with nuts ond lock woshers. One of the bolts holds
down olso the
lug of the eorthing coble-
The inner frome,
forming the
odiusting element
of the heodlomp insert, is ottoched
to the
hous'
ing by two speciol odiusting screws
ond two
tension springs. The heodlomp insert
is ot'
toched to
the bezel by
three copscrews.
There is one left-hond ond
one right-hond
support plote.
Both should
be mounted with the
oriow ond the word "TOP"
upwords. With
the
exception of the ouxiliory heodlomps, the
heod'
lomp inserts ore different for
the left-hond ond
the right-hond troffic. The leods
enter the hous-
ing through o
rubber grommet.
When r-eplocing the insert, remove
the bezel
copscrews. After
hoving fitted o new insert, it
is necessory to reodiust the
heodlomps.
Front Direction Indicotors
The right-hond ond
left-hond direction indi-
cotors ore undisossembloble units
(the
lomp
fostening sockets (locks) ore
mounted in the
direction towords the cor longitudinol centre
line). They ore fostened to their brockets in the
bumper with o nut ond o ploin ond
o lock
wosher.
Toil Lomp Cluster
The lomp cluster is on undisossembloble unit
fostened to
the bodywork by
nuts with ploin
woshers ond the
respective bolts.
Scrope off
the enomel ot the
top bolt used for holding
down the eorthing coble.
For the sequence
of the individuol lomps ond
their bulbs see Fig. 13.111 ond the respective
porogroph on bulbs.
Fig. 13.812 -
Adiusting ond
Fastening Screws of Right-hond Heodlomps -
their locotion
on
left-hond he-odlomps is their
mirror ref lection
1 -
Sidewoys odiusting screw
2 -
Height odiusting screw
3 -
Fostening screws
182

e8r
s6 v8
36 VB
9'8 S
SgL V8
SgL V8
SgL V8
SgL VB
SSL V8
36 VB
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L.gZ d
MLTIAZL
r/8 r /V vl^.zL
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