13
TEST 3 - Isolate Control Panel
A “No Output” condition may or may not be related to the
alternator windings. To help isolate where the issue is, follow
these steps:
1. With the engine OFF, disconnect the power lead
harness from the back of the control panel.
2. Set meter to measure AC volts.
3. Connect the test leads to the stator wires #11 and #22
located in the control panel connector. Polarity does
not matter.
4. Start the engine and measure the voltage output.
5. Shut off the engine.
• A voltage output of 120VAC indicates the alternator
is functioning, and the no output condition is likely in
the control panel. Disassemble the control panel and
inspect for any indication of what may cause no output.
Refer to the unit wiring diagram to verify connections.
• A low voltage output indicates the alternator needs to
be tested. Proceed to
Check Alternator.
Check Alternator
Alternator Disassembly
The alternator can be diagnosed without complete disassem-
bly. To access the power winding, disconnect the connector
from the back of the control panel. The Brush Rectifi er (
D
)
is mounted inside the rear bearing carrier (
E
, Figure 7). To
access the brush rectifi er, remove the four screws (
A
) and
remove the plastic, rear bearing cover (
B
).
Remove the two screws (
C
) and carefully pull out the
brushes. Disconnect wires #2 and #6 (excitation winding).
Once removed, the rotor slip rings can be accessed through
the area where the brushes were mounted.
NOTICE:
The brushes are made of a carbon material and
can easily break. Use care when removing and installing the
brushes.
Figure 7
A
C
B
D
E
Summary of Contents for 030430
Page 20: ...20 BRIGGSandSTRATTON COM Generator Wiring Diagram ...
Page 21: ...21 Generator Schematic ...
Page 22: ...22 BRIGGSandSTRATTON COM Notes ...
Page 58: ...58 BRIGGSandSTRATTON COM Main Unit ...
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