Dacia Pick-Up 1304/1305/1307. 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

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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