Fiat 411 R Service Manual page 43

$..
' * - ' - " g ' . z , § - L , - * , , , ; g * \ ' : . " ' - 1 . ' ) - . < | H 'I 5§~m~. ; am; ' _ E H "
3
'<'l
.5 .
Q
3.
ii
4 \
'x
§=3~
iii
.1.
- ' - u m;
_l
.-':5
2 - v . n , 5 : , | : m - . m
\ . N § 1 u l E \ : r l u
ii
. » _ . . _ = -
: . . . 1 . : - 1 2 1 - m a c 1 . ¢ . | . 1 : . t . . i . . v . u - 4 : s ; I . - I - > ' ~ ' - ~
.»
a _ . . _ ® _ . - _ 1
I T
®—F _ _ . .
mi}
30 3! 5? SS
Fig. 1-£3. — Eiectricai diagram for testing the out-out reiay
closing voltage.
M. Motor 01' test bench - 6. Generator - V. Voitrneter.
33671
0
I
P—- I Ul
..|.
3.'
....-/
to
+ ' or 51
7&7?"
Z
. _ 1'
Fig. $44. - Electricad diagram for testing the inversion
current.
M. Motor of test bench - G. Generator W A. Ammeter -
V. 'voltmeter.
(iafieries are connected in series and must be fuity charged,
at a capacity of 60 Ah).
Voltage regulator.
=~
Current regufator.
5
313 3'! 6? 51
-Hr a a ifi
*_o--
5 +*
K .
-._
ili.,,¢---J I
Fig. 145. - Electrical caonnecfion diagram for the check-
ing of the voltage regulator and of the current regulator.
M. Motor of the '(est bench - G. Generator - V. Voitmeiar -
A. Ammeter.
-- check the vohfmeter vaiue when cut-out relay
closes; it must he read at the moment the lamp
of 24 V, 5 W, lights; insert lamp between terminal
39 and ground.
Closing value must be 25,1 to 25,9 V, for both
pre-rnodification and post»moo'ification groups.
Checks shouid be made when cold, before col}
temperature increases.
2) Back current at 25¢ F0" C (F73 50° F),
Wiring should be made according to Fig. 144 and
generator run to 2000 R.P.M. during about 5 minutes.
making sure that voltmeter reads at least 29 2/, than
decrease the generator speed.
The ammelfer pointer which was indicating a certain
charging current will decrease and approach 50 gem
and begin to show the inverted current value.
As the generator progressively slows down the
ammeter dial will show increased vaiues, up in a ¢@,-
tain iirnit; after that a sudden fall to zaro v/ii! be
observed, due to the opening of the cut-out relay
points. Such a current value will be not larger
than 3 A for groups having production number up
to 088917 and within 5 to 10 A for groups from
number 088918 up.
Note. - Such a test should be carried out quiclrly
to avoid battery discharge. When repeated, start
from a stopped generator.
Regulation voltage at hair' load on batteries, at
566313306 (.12:?i37.4°F).
Close the cover and connect it according to the dia-
gram of Fig. 145 and operate the group until the coil'
temperature reaches 41" to 53° C (11? to 127'" F).
Start the generator and siowly run it up to the speed
rate of 2000 l?.P,M.;
adjust rheostat so that generator delivers a current
of 4 A fhalflload currenz');
Check that at such current value, the voltage is
about 28,? to 29,7 V.
Limitation current on batteries.
Connect group according to wiring of Fig. 145, and
check the limitation current on batteries immediateiy
after the foregoing test, using the same instruments;
proceed as follows:
-— rheostat should be set at its maximum resistance
value;
-— resistance shall then be reduced until the current
limitation value of 5 to 5,5 A has been reached,
for groups up to No. 088917', and of 4,75 to 5,25 A
for groups from No. 088918 up (corresponding
voltage: 28 V); '
-~ said currents should not decrease when resistance
is reduced, and on the contrary, voltage should
go down nearly to 24 V (for groups up to No.
088917').
93
. . . - ~ » - » _ . . . . . . - . - - - . = . . ~ = . . < . . . _ . . , P W V