Generac Power Systems MC - Manual (Page 40)

TEST 34:- EXCITATION WINDINGS
Remove the
assembly. alternator front panel Disconnect the white connector plug
from its receptacle on the stator
can. On the receptacle, locate Pin
No. 2 and 6 to which Wires No. 2
and 6 attach. Set VOM to ”+DC’' and
to "Rxl” scale, then zero the meter.
Connect one meter test probe to re­
ceptacle Pin No, 2, Connect the re­
maining test probe to receptacle Pin
No. 6. Meter needle should swing up­
scale and read approximately 1,1
Ohms, This is the resistance of the
excitation winding,
RESULT;- Meter needle does not move.................... Replace stator
Windings check good.............. ,,,Continue diagnostic tests
TEST 35:- CARBON DEPOSITS
Excessive carbon buildup in the engine combustion section can serious­
ly affect engine power. Carbon deposits should be removed every 500
operating hours, whenever the cylinder head is removed, or when prob­
lems are encountered. Refer to the engine section of Manual for cylin­
der head removal and installation procedures. Cylinder head bolts must
be properly located and properly torqued.
RESULT:- Power output is normal.................... Discontinue tests
Problem is still encountered,......Continue diagnostic tests
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