Flywheel Alternator Components; Static Tests; Regular Tests; Regulator Ground - Wisconsin VH4D Repair Manual

Problem: Low/No Charge
Possible Cause & Remedy
Test 2.0
2.1
2.2
Proceed with Test
1.0 and 1.1. It is
necessary to
slightly discharge
battery t o make
system work.
With engine running
at full I~P~.~,, check
bat tery voltage
with DC Voltmeter.
If the charge rate
increases --
2.3 If system does not
charge
2.4
2.5
If charge rate in-
creased with re-
gulator disconnect-
ed.
If the charge rate
does not increase
with regulator dis-
connected.
2.2 Alternator functioning
properly. [+attery was
fully charged.
2.3 Operate engine with
regulator disconnect-
ed (continue withTest
2.4).
2.4 Regulator was at fault.
I~eplace regulator
module, - static check
regulator per Test
No. 5.1.
2. 5 Regulator not at fault.
Check Rectifier
per
Test 3.0, 3.1 or static
check per Test 6.0.
Problem: Low/No Charge
Possible Cause & Remedy
Test 3.0
3.1
3.2
3.3
Test conditions
and procedure the
same as 1.0 and
1.1 it is neces-
sary to slightly
discharge bat-
tery to make
system work.
Plug new Rec-
tifier in system.
Run engine at full
RPM.
If the charge rate
increases with
new rectifier in
system.
If the charge rate
does not increase
with new Recti-
fier --
3.2 Rectifier module was at
fault. Permanently in-
stall new rectifier
module.
3.3 Rectifier not at fault.
Check Stator per Test
4.0.
FLYWHEEL ALTERNATOR COMPONENTS
STATIC TESTS
The following test equipment is required:
DF83 Analyzer - Wisconsin Part, Fig. 44
DFS1 Flashlite Tester - Wisconsin Part, Fig 44
VOLT-OHM-MILLIAMMETER Simpson 260 or equal.
The DF83 Analyzer was developed for testing the solid
state ignition and flywheel alternator components as fur-
nished on Wisconsin engines. It is very efficiently and
economically powered by four transistor radio type 9 volt
batteries. The DFS1 Flashlite Tester is used primarily for
checking continuity.
RED LE~
~+
BLLEAAC~ ~(
[I -~ INDICATOR
DF83 ANALYZER
DF81 FLASHLITE TESTER
Problem: Low/No Charge Possible Cause & Remedy
Test 4.0
4.1
With engine stop-
ped, unplug all
connectors be-
tween modules
and stator. Start
engine and run at
2400 RPM. W|th
AC voltmeter
check voltage be-
tween each of the
black stator leads
and ground.
If one of the two
voltages is zero
or they are over
10% apart. --
4. 1 The stator is defective
and should be replaced.
Static check stator per
Tests 7.0, 7.1, 7.2.
Fig. 44
REGULATOR TESTS
Test 5.0 REGULATOR GROUND
The YJ 60 Regulator module must be mounted to a
metal surface for grounding purposes. Check for con-
tinuity with a VOM (R x 1 scale) or test light.
TESTER
TESTER
RED LEAD
BLACK LEAD
RESULT
To Regulator
To Ground DF 83-Light On
Body DF 81 -Light On
VOM- Continuity
3O