Dacia Pick-Up 1304/1305/1307. Service manual — part 31
STARTING AND CHARGING
16
16 - 16
R
EMOUNTING
Check the new diode.
Press the new diode in the diode support observing the marking : red for “ + “ , black
for “ - “.
Mount the diode support on the alternator.
CHECKING OF THE RECTIFYING BRIDGE
After dismounting the diode support perform a visual checking of the diodes to avoid
defects ( short circuits, broken ) as well as the connections state.
A. CHECKING OF THE POSITIVE DIODES
Place the red terminal ( positive cable )
of the ohmmeter on the support , in “ d “
point then the black terminal ( negative
cable ) in sequence in “ a “ point , “ b
point and “ c “ point. After reversing the
cables and repeating the checking the
ohmmeter needle must not deviate
( resistance = ).
B. CHECKING OF THE NEGATIVE DIODES
Place the negative terminal of the ohmmeter on the support, then on “e” point,after
that, the red terminal in sequence ,on “a” point , “ b” point and on “c “ point.
For a correct operation, the ohmmeter needle must deviate. After reversing the cables
and repeating the checking on the mentioned points , the ohmmeter needle must not
deviate ( resistance = ).
ALTERNATOR
16
STARTING AND CHARGING
16 - 17
CHECKING OF THE ALTERNATOR STATOR
After visual checking of the coils which must not show heating or oxidation traces,check
the resistance and the insulation of the coils.
A.CHECKING OF THE COILS INSULATION
After placing the ohmmeter terminals on chassis ground , on “ I point and on one of the
three terminals marked with “ f “ , “ g “ , “ h “ , the ohmmeter needle must not deviate
( resistance = ).
B. CHECKING OF THE COIL RESISTANCE
Place in sequence ,the terminals on the coils extremities: “ f “ and “ g “ ; “ g “ and “ h “;
“ f “ and “ h “, the values of the measured resistances must be equal in the three cases , the
maximum allowed variation being of + / - 5 %.
ALTERNATOR
STARTING AND CHARGING
16
16 - 18
CHECKING OF THE ALTERNATOR ROTOR
After the visual checking of the coiling (without heating or oxidation traces), check the
collecting rings for defects (sometimes it is recommended their polishing with very fine
granulation sandpaper).
A. CHECKING OF THE COILING INSULATION
Place the ohmmeter terminals on
chassis ground, on 1 and on one of the M
or N collector rings. The ohmmeter needle
must not deviate ( resistance = ). If it
deviates, there is a short circuit between
the rotor collector rings or current leakage
between coiling and shaft.
B. CHECKING OF THE COILING RESISTANCE
To check the coiling resistance place the ohmmeter terminals on M and N collector
rings; the measured resistance must be 4,6 +/- 0,1 Ù at 20
o
C
. If the value of the resistance
is very high the rotor coiling is burnt and if the resistance is zero, there is a short circuit.
VOLTAGE REGULATOR – RELAY
The pick-up vehicles equipped with alternator type 1114.200 have the voltage regulator
fixed on the left front inner wing ;the alternator type 1180 is provided with incorporated
voltage regulator (type 1180.120).
Their characteristics are the followings :
C
HARACTERISTICS
A
DJUSTMENT
RANGE
Adjusted voltage [ V ]
13,8 - 14,5
Adjusted voltage at low charge of the alternator [V]
14,1 - 14,5
Adjusted voltage at high charge of the alternator [V]
13,8 - 14,1
Voltage difference between the two adjustment steps [V]
0,2 - 0,6
Maximum IF excitation current [ A ]
5
ALTERNATOR
16
STARTING AND CHARGING
16 - 19
VOLTAGE REGULATOR
( alternator type 1114.200 )
D
ISMO UNTING
Disconnect: the battery, the ( + ) supply cable and the excitation wire of the voltage
regulator by unscrewing the fixing nut.
Unscrew the right side nut, loosen the left side one and dismount the relay.
R
EMO UNTING
Place in its place the regulator and tighten the fixing screws.
Connect :
- the supply cable;
- the excitation wire by tightening the nut;
- the battery.
ALTERNATOR
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