Skoda 105 s 1980 Workshop Manual page 167

r3.2-t 3.3
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Observe strictly the following instructions:
1. Mointoin the electrolyte level ot the level
of the perforoted inserts between the plotes or
so thot the inserts ore covered with the electro-
lyte to o moximum height of 4 mm. The bottom
l i m i t o f t h e e l e c t r o l y t e l e v e l i s 3 m m b e l o w t h e
perforoted inserts. Use only distilled woter for
topping up the electrolyte. Add electrolyte only
if it hos been obviously spilt from the bottery.
In such cose, its density must correspond to
t h e d e n s i t y o f t h e e l e c t r o l y t e E e m o i n i n g i n t h e
bottery.
2. Keep the bottery terminols cleon, remove
o x i d e s o c c o s i o n o l l y , o n d c o o t t h e t e r m i n o l s
w i t h m i n e r o l i e l l y .
3. Wipe off the electrolyte spilt over the bot-
tery surfoce since it is conductlve ond couses
dischorging of the bottery.
4. Check the chorging of the bottery occord-
ing to the electrolyte density or check the
voltoge drop using o voltmeter with o looding
resistor ond comporing the obtoined reoding
with on evaluotion toble or scole.
5. When chorging the bottery outside the cor,
use chorging current volues occording to the
t o b l e . T h e v o l t o g e s h o u l d b e c o n t r o l l o b l e i n t h e
ronge from 12.6 to 16.8 volts. The fully dis-
chorged bottery is fully chorged in obout 13 to
20 hours when
o) the electrolyte ottoins o density of 1.28 in
o l l c e l l s o n d d o e s n o t c h o n g e i n o p e r i o d o f
two hours;
b ) t h e c e l l v o l t o g e ( m e o s u r e d w i t h o p p l i e d c u r -
rent) ottoins o volue of 2.6 to 21 volts ond
does not chonge within two hours of con-
t i n u e d c h o r g i n g ;
c ) o l l c e l l s o r e l i v e l y g o s s i n g .
6. An olreody used bottery must not be left
without electrolyte or dischorged os it is opt to
suffer from such o condition.
7. The bottery in on unused cor must be
removed ond chorged outside the cor within
three months ot th-e lotest. lf the cor is under
repoir for o prolonged period, toke oll necessory
steps to keep the bottery in good condition.
Bottery Chorging versus Electrolyte Density
S p e c i f i c g r o v i t y l
i
E l e c t r o l y t e
( d e n s i t y )
i C h o r g i n g l
f r e e z i n g
g/cms
I I
temperoture
1.28
1.24
1.22
1 . 1 5
1 . 1 2
1oo o/o
Toolo
s 0 %
2oolo
0
-60 0c
-50 0c
-35 0C
-17 "C
-120C
At o 20 per cent chorging, the bottery is
considered procticol ly dischorged.
Toble of Chorging ond Dischorging Values
Roted voltoge
12 volts
Roted copocity C 20 ot o
20-hour dischorging to 1.75
volts per cell 37 omperehours
Normol dischorging current
for 20-hour dischorging to
1.75 volts per cell 1.75 omperehours
Normol uniform chorging
3.7 omperes
Two-stoge chorging:
stoge I up to 2.4 volts per
c e l l ; g o s s i n g b e g i n n i n g 4 . 4 o m p e r e s
s t o g e l l u p t o f i n o l m o r k s
of fuf fychorgedcondition 2.2 omperes
Diffenent instructions, determined specificolly
by bottery monufocturers, opply to moking o
new ond empty bottery reody for operotion or
t o s o - c o l l e d q u i c k c h o r g i n g .
Sofety Precoutions ond Other Meosures
During chorging, the electrolyte temperoture
must not exceed +40oC. As soon os this tem'
peroture is reoched, interrupt the chorging or
l o w e r t h e c h o r g i n g c u r r e n t ( t h i s o p p l i e s e s -
p e c i o l l y t o s o - c o l l e d q u i c k c h o r g i n g ) .
During chorging, on explosive mixture of hy-
drogen with oxygen is liberoted from the elec-
trrolyte. Therefore, the oreo where the bottery is
chorged must be ventiloted, ond it is forbidden
to opprooch with o noked flome (or spork) the
cell filling holes (even ofter o consideroble
period of time ofter the chorging hos been
c o m p l e t e d ) .
W h e n c h o r g i n g t h e b o t t e r y , o p e n t h e f i l l i n g
holes of its cells to enhonce degossing.
The electrolyte is on ocid hormful to the skin
ond clothes os well os to ports of the cor fin-
i s h e d i n e n o m e l . R i n s e w i t h w o t e r i m m e d i o t e l y
ony contominoted spots.
13.3 ALTERNATOR
The olternotor is o three-phose generotorwith
o built-in semiconductor rectifier for feeding
electricol devices ond the bottery with direct
current.
Alternotor lnstollotion ond Generol lnstructions
They opply to both olternotor models. The
following principles should be observed:
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