Piper COMANCHE PA-24-180 Service Manual page 538

PIPER COMANCHE SERVICE MANUAL
BLAST TUBE
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COMMUTATOR
TERMINALS
BALL BEARING
OIL SEAL
A 13
COMMUTATOR
END FRAME
DRIVE END FRAME'
FIELD COIL
0
FIGURE 9-2. SECTIONAL VIEW OF GENERATOR
generator output. Excessive belt tension will cause rapid belt and bearing wear. Check the tension
of a new belt 25 hours after nstallation. Proper adjustment should allow, at midpoint between
pulleys. a depression of approximately 1/4 - 3/8 of an inch. If the depression in the belt does not
fall within the given limits, readjust. Thereafter, the belt tension should be checked every 100
hours.
9-8. Shunt Generator Output. The maximum output of shunt generators is determined by the cur-
rent setting of the current regulator with which the shunt generator is used. Checking of this
setting is discussed in the applicable regulator bulletin.
9-9. Checking DefectiveGenerators. If thegenerator-regulator systemdoes notperform according
to specifications (generator does not produce rated output or produces excessive output), and the
trouble has been isolated in the generator itself by following the procedure outlined in paragraph
9-5, the generator may be checked further as follows to determine the locaton of trouble in the
generator.
9-10. No Output.
a. II the generator will not produce any output, remove the cover band and check the commu-
ELECTRICAL SYSTEM
ISSUED: 11//72
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3 A16