Section
VIII
Handling,
Serv
and
Maint
CAUTION
BEECHCRAFT
Duchess
76
The entire system should
be
inspected and the
malfunction determined and corrected before re-
setting the overheat switch.
Every 500 hours of heater operation, the heater should be
removed
from
the airplane and disassembled. All parts
should be thoroughly inspected, necessary repairs made and
parts
replaced.
(Refer
to the Duchess 76 Maintenance
Manual.)
ALTERNATORS
Since the alternators and electronic voltage regulators are
designed
for
use on only one polarity system, the following
precautionary measures must
be
observed when working on
the charging circuit
or
serious damage
to
the electrical equip-
ment will result:
1.
When installing a battery, make certain that the ground
polarity of
the
battery and the ground polarity of the alternator
are the same.
2.
When connecting a booster battery,
be
sure
to
connect
the
negative battery terminals together and the positive bat-
tery terminals together.
3. When using a battery charger, connect the positive lead
of
the charger to the positive battery terminal and the nega-
tive lead of the charger to the negative battery terminal.
4.
Do
not operate
an
alternator
on
open circuit. Be sure all
circuit connections are secure.
5. Do not short across or ground any of the terminals on
the alternator or electronic voltage regulator.
6.
Do not attempt to polarize
an
alternator.
8-24
January
1978
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