Tecumseh HH100 Handbook page 51

Before performing the following tests see page 48, A through F.
NOTE: Tests must be followed in their order of listing. EXAMPLE: Test No. 1 must be completed before
proceeding to Test No. 2. Replace any defective part.
B+ TERMINAL WIRE
D.C. VOLTMETER LEADS
REGULATOR-RECTIFIER
A.C. VOLTMETER LEADS
TEST NO. 1 (NO CHARGE TO BATTERY)
Disconnect B+ at battery lead (NOTE: Keep test to a minimum with B+
wire disconnected from the battery) and check D.C. voltage between
B+ regulator lead and case:
1. 2500 RPM 13.0 volts min.
3000 RPM 16.0 volts min.
3600 RPM 20.00 volts min.
2. If less than above voltages but
greater than 0 volts.
3. If 0 volts at any above speeds.
TEST NO. 2 (NO CHARGE TO BATTERY)
With battery connected, check B+ to ground voltage with D.C. voltmeter.
1. 2500 RPM: If 11.0 volts or higher
place load (head lights) on battery
to reduce battery voltage to 10.0
volts. 3000 RPM: If 20.0 volts
or higher place load (head lights)
on battery to reduce battery
voltage to 11.0 volts. 3600 RPM:
If 13.5 volts or higher place load
(head lights) on battery to reduce
battery voltage to 12.0 volts.
a. If charge rate increases.
b. If charge rate does not increase.
TEST NO. 3 (NO CHARGE TO BATTERY)
Disconnect plug from regulator-rectifier and test A.C. voltage at plug.
1. 2500 RPM: Voltage reads less
than 16 volts.
2. Voltage reads over 16 volts.
3. 3000 RPM: Voltage reads less
than 19 volts.
4. Voltage reads over 19 volts.
5. 3600 RPM: Voltage reads less
than 24 volts.
6. Voltage reads over 24 volts.
10 AMP ALTERNATOR TEST
1. System okay. Check for
defective ammeter.
2. Check for possible defective
regulator-rectifier.
3. Check for defective stator or
regulator-rectifier.
System okay. Battery was charged
fully.
Check for defective stator or
regulator.
1. Defective stator
2. Defective regulator-rectifier.
3. Defective stator
4. Defective regulator-rectifier.
5. Defective stator
6. Defective regulator-rectifier.
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