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4.
Check field coil resistance as per specification given in A-6.
5.
Insufficient cooling of the generator.
Ambient air enter ing the
generator should not exceed 104·F (40·C).
Operating efficeincy of the generator decreases as the ambient air
temperature entering the generator end bell increases above 104·F.
Generators
in
confined
areas
may
require
the
ducting
of
cool
outside air into the compartment and directed toward the inlet at
the generator end bell.
6.
Check condition of brushes for wear and contact with slip rings on
armature.
Insure brushes are not sticking in holders.
High Voltage Output
1.
Verify voltage at generator output leads.
No load voltage
126 - 130 volts (Generator Hot)
61 - 61.6 Hertz
(51 - 51.5 Hertz)
2.
Check internal wiring of generator leads attached to brush rig and
leads from brush rig feeding AC to br idge rectifier.
Refer to
Internal wiring schematics.
These internal wiring diagrams are
applicable to related 50 Hertz units as well.
137
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