Belt Driven Alternator - Wisconsin vg4d Repair Manual

Test 7.2 CONTINUITY with DF 83 Analyzer
TEST
NO.
4
ANALYZER ANALYZER ANALYZER
RED BLACK WHITE
LEAD TO: LEAD TO: LEAD TO:
Stator
Ground --
Black Lead
Stator Other
Ground --
Black Lead
Ground Stator --
Red Lead
Ground Stator --
Black Lead
Ground Stator Other --
Black Iw.ad
LIGHT
INDICA-
TION
ON
ON
ON
ON
ON
TERMINAL
~
¢
YBSI
PLUG
'
YB82
If light indication is other than shown, stator is defective. If
stator checks out good, perform voltage test 7.3.
Test 7.3 STATOR RUNNING VOLTAGE
With the engine stopped, unplug all connectors between
modules and stator. Start the engine and run at operating
speed. Perform the following tests with an AC voltmeter:
TEST
NO.
1
To Stator
Black Lead
METER METER STATOR
RED LEAD BLACK LEAD DEFFX;TIVE IF:
To Ground
To Other
Stator
Black Lead
To Ground
Either Reading
is O
or
Readings Vary
:more than 10%
BELT DRIVEN ALTERNATOR
The 12 volt - 37 Amp Automotive type Alternator is
optionally available in place of the Flywheel Alternator.
No maintenance or adjustments are required other than
periodically checking for loose, broken or dirty wire-
terminal connections, and for proper drive belt tension.
Bearings are pre-lubricated, no additional lubrication is
necessary. The Regulator is an all electronic transistorized
devise, therefore no mechanical contacts or relay adjust-
ments are necessary for voltage regulation.
The alternator is wired into the engine electrical system per
Fig. 47.
IMPORTANT
This is a Negative Ground system. Charging compo-
nents will be damaged if grounded wrong in connecting or
jumping batteries.
Cbaution: Handle battery carefully to prevent acid
urns. Avoid sparks near battery - gas given off by
battery is explosive.
PRECAUTIONS to be exercised in the use of belt driven
alternator:
1. Observe proper polarity when installing bat-
tery; negative battery terminal must be
grounded. Reverse polarity will destroy the
rectifier diodes in alternator.
2. As a precautionary measure, disconnect
ground battery terminal when charging battery
in vehicle. Connecting charger in reverse will
destroy the rectifier diodes in the alternator.
3. DO Not, under any circumstances, short the
field terminal of the alternator to ground, as
permanent damage to the regulator may occur.
4. DO Not, remove the alternator from the vehicle
without first disconnecting the grounded bat-
tery cable.
5. Do Not, operate engine with battery discon-
nected, or disconnect the alternator output lead
while the alternator is operating, as damping
effect of the battery will be lost. The voltage
will rise to an extreme value and permanent
damage to the regulator may occur.
6. DO Not, disconnect the voltage regulator
while the alternator is operating, because the
large voltage transient that occurs when dis-
connection takes place may damage the regu-
lator.
7. Caution: Output wires from Alternator to
Ammeter, and from Ammeter to battery termi-
nal on starting solenoid must be of sufficient
size for charging 37 amps. Use No. 10 gage
stranded wire, or larger.
35