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13-8
GROUP
13-CHARGING SYSTEM
FIG. 8 - Bosch Alternator Terminals
FIG. 9- Lucas Alternator Terminals 14 ACR Shown
stat or the switched lamp bank to the
battery terminals. (Ensure that the
load control is in the off position).
9. Connect a tachometer to the
engine.
10. Start the engine and slowly
increase engine speed to 2400 R.P.M.
(6000 R.P.M. alternator speed).
11. Adjust the carbon pile or lamp
bank until a constant 14 volts is
achieved.
12. The
ammeter
should
now
register a 40 amp output.
13. Reduce engine speed to idle
R.P.M. and remove the battery load.
CAUTION: Never remove the battery
load while the engire
is
running at speed
14. Switch off the engine and re-
move the battery earth cable.
15. Remove the test meters and
the test connector and replace the
original wiring to the alternator.
16. Replace the battery earth
cable.
Should the alternator fail to pro-
duce the rated output it must be
removed from the vehicle for further
tests and repairs.
LUCAS
14ACR - all 8 cyl. vehicles. Has
integral regulator.
14AC - All 6 cyl. vehicles fitted
with air-conditioning. Has remote
regulator.
NOTE: When testing the output of
the Lucas 14ACR alternator on the
vehicle the regulator, the field F
terminal is not accessible. To isolate
the regulator, earth the power tran-
sistor to the alternator body by using
a small screwdriver between the
transistor case and the slip ring end
head.
1. Ensure that the ignition is
switched off.
2. Disconnect the battery earth
cable.
3. Remove the wiring plugs from
the alternator (Fig. 9).
4. Install the main terminal of the
test connector to the
+
terminal of
the alternator (Fig. 11).
5. Connect one lead of the test
connector to the IND terminal of
the alternator.
6. Connect one lead of the test
connector to the positive lead of a
0
-
60 amp moving coil ammeter.
Connect the .negative (Black) lead of
the ammeter to the
+
terminal of the
wiring harness.
7. Connect the positive lead of a
good quality voltmeter to the test
connector and the negative lead to
ground.
14AC only: connect a jumper
lead from the F terminal to ground.
14ACR only: earth the power
transistor case to the slip ring end
head.
8. Replace the battery earth cable.
9. Connect the carbon pile rheo-
stat or switched lamp bank across the
battery terminals. (Ensure that the
load control
is
in the off position).
10. Connect a tachometer to the
engine.
11. Start the engine and slowly
increase the engine speed to give
approximately 6000 alternator R.P .M.
Refer to specifications for engine
R.P.M. chart.
12. Adjust carbon pile or lamp
bank untill3.4-13.6 volts is achieved.
Rated output should now be regis-
tered on the ammeter. Do not allow
voltage to exceed 15V.
13. Reduce the engine speed to
idle R.P.M. and remove the battery
load.
CAUTION: Never remove the battery
load while the engine is running at
speed.
14. Switch off the engine and re-
move the battery earth cable.
15. Remove the test meters and
the test connector and replace the
original wiring to the alternator.
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