Service Procedures; Overhaul Of Alternator - Piper SENECA II Service Manual

PIPER SENECA II SERVICE MANUAL
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Figure 11-2. Removal of Slip Ring End Bearing
Figure 11-3. Removal of Rectifier
h. Check the field circuit by the following procedure:
I. On lead connected to
(F
1) terminal, connect a voltmeter to the field lead and to ground. If
voltmeter indicates any voltage, the circuit is operational.
i.
If
voltage is indicated at both the battery lead and field lead, the alternator should be checked for
possible malfunction. (Refer to Paragraph 11-9 .)
11-8. SERVICE PROCEDURES. Since the alternator and regulator are designed for use on only one
polarity system, the following procedures must be observed when working on the charging circuit. Failure
to observe these service procedures will result in serious damage to the electrical equipment.
a. When installing a battery, always make absolutely sure the ground polarity of the battery and the
ground polarity of the alternator are the same.
b. When connecting a booster battery, make certain to connect the negative battery terminals
together and the positive battery terminals together.
c. When connecting a charger to the battery, connect the charger positive lead to the battery
positive terminal and the charger negative lead to the battery negative terminal.
d. Never operate the alternator on open circuit. Make absolutely certain all connections in the
circuit are secure.
e. Do not short across or ground any of the terminals on the alternator or regulator.
f. Do not attempt to polarize the alternator.
11-9. OVERHAUL OF ALTERNATOR. When repairing the alternator, complete disassembly may not be
required. In some cases, it will only be necessary to perform those operations which are required to effect
the repair. However, in this section, the complete overhaul is covered step-by-step to provide detailed
information on each operation. In actual service practice, these operatiom may be used as required.
Reissued: 10/11/79
ELECTRICAL SYSTEM
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