Overhaul Of Alternator; Disassembly Of Alternator; Removal Of Rectifier View; Removal Of Slip Ring End Bearing View - Piper Navajo Chieftain PA-31-350 Service Manual

Figure 11-5. Removal of Rectifier
Figure 1-6. Removal of Slip Ring End Bearing
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.
11-11. 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 operations may be used as required.
11-12. DISASSEMBLY OF ALTERNATOR.
a.
Remove the two Number 10-24 screws holding the brush holder assembly in the slip ring end
head. Remove the brush and holder assembly from the end head.
b.
Remove the safety wire from the through bolts. Hold the pulley with a strap wrench and remove
the pulley nut. The pulley must be removed with a puller. Remove the fan, woodruff key and spacer from
the shaft.
c.
Remove the four through bolts and tap the drive end head lightly to separate the drive end head
and rotor, as a unit, from the stator and slip ring end head.
d.
Remove the nuts, lock washers, flat washers and insulators from the output and auxiliary
terminal studs. Note carefully the correct assembly of the insulator washers and bushings. Using the special
tools shown in Figure 11-5, support the end head and press out the three negative rectifiers. The end head
can now be separated from the stator assembly.
e.
To remove the slip ring end bearing and grease seal, it will be necessary to have a hook type or
impact type bearing puller as shown in Figure 11-6. Do not remove the bearing unless replacement is
necessary.
Reissued: 9/23/80
ELECTRICAL SYSTEM
NAVAJO CHIEFTAIN SERVICE MANUAL
3C22