Briggs & Stratton 86262GS, Familiarization & Troubleshooting Manual

Page: 74 / 128

Test 5
: — Check Stator Excitation (DPE) Windings
NOTE:
The excitation wires may be colored or
numbered.The numbered wires are #2 and #6.The
colored wires are blue and red. Be sure not to
confuse the colored excitation wires with the
colored power wires.The excitation wires are the
wires connected to the bridge rectifier or voltage
regulator.
• Set the VOM to its “OHM” scale.
• Connect the test leads to the stator excitation wires
(Figure 3.24).
Measure the resistance and compare it to the nominal
resistance from the appropriate table
(Briggs & Stratton Power Products
®
“Portable Generator
Rotor/Stator Resistance Tables Pub. #87971 Rev 6 or later).
A reading of infinity or high resistance indicates an opening
in the excitation winding.
A low reading indicates a shorted stator
winding.
• Connect one test lead to a stator power wire. Connect
the other test lead to one of the stator excitation wires
(Figure 3.25).
A reading of infinity should be measured. A reading other
than infinity indicates a power winding
shorted to an excitation winding.
• Connect one test lead to an excitation wire. Connect
the other test lead to a good metal ground.
(Figure 3.26)
A reading of “infinity” should be measured. A reading other
than infinity indicates a winding
shorted to ground.
72
Section 3 • Generator Diagnostics and Adjustments
Portable Generator Familiarization & Troubleshooting Guide
Replace Stator
Replace Stator
Replace Stator
Figure 3.24 —Checking DPE Resistance
Figure 3.26 — Checking DPE “Short To Ground”
Figure 3.25 — Testing For Short Between Windings