Piper Comanche PA-24 Service Manual page 699

e.
f.
g.
PIPER COMANCHE SERVICE MANUAL
Do not short across or ground any of the terminals on the alternator or regulator.
Do not attempt to polarize the alternator.
External power should not be connected to or removed from aircraft with master switch on.
9-61e. Overbaul 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. How-
ever 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.
9-6 If. Disasstmbly 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 nul. The pulley must be removed with a puller. Remove thefan. 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 !---d.
d. Remove the nuts. lock washers. flat wasi ; and insulators from the output and auxiliary terminal
studs. Note carefully the correct assembly of the insulator washers and bushngs. Using the special tools shown
in Figure 9-27c. 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 pulley as shown in Figure 9-27d. Do not remove the bearing unless replacement is
necessary.
Figure 9-27c. Removal of Rectifier
Figure 9-27d. Removal of Slip Ring End Bearing
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ELECTRICAL SYSTEM
ISSUED: 8/18/72