PIPER
SENECA
II
SERVICE
MANUAL
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TERMINAL
AUXILIARY
TERMINAL
Figure 11-7. Terminal Assembly
d.
After the slip ring end head
is
completely assembled, the stator and rectifier leads must be
secured
to
the rectifier mounting plate with epoxy. Make sure the stator leads are positioned
so
that
they
do
not
interfere with the rotor.
e.
Install the slip ring end bearing and oil seal. Make sure the lip
of
the oil seal
is
toward the bearing.
Stake the seal in place. Correct assembly
of
bearing, seal, inner race and spacer
as
shown in Figure 11-8.
f.
Assemble the alternator and install the through bolts. Spin the rotor to make sure there
is
no
mechanical interference. Torque the through bolts to 30
to
35 inch-pounds. Safety wire should be installed
after the unit has been bench tested for output.
g.
Install the brush and holder assembly and retaining screws. Spin the
rotor
and check for
interference between the brush holder and rotor. Check across the field terminals with an ohmmeter.
The ohmmeter must indicate the amount
of
rotor resistance listed in Table XI-II.
11-13. TESTING ALTERNATOR. The alternator should be tested
to
determine
if
it
is
capable
of
delivering its full rated output.
CAUTION
The flange mounted alternator requires a source of ventilation. Do
not test these alternators at full rated output for more than
30
seconds unless adequate air pressure for cooling
is
supplied.
a.
Wiring connections for bench testing the alternator are shown in Figure 11-9.
Output
test
specifications are given in Table
XI-II.
Adjust the carbon pile
if
necessary to obtain the specified voltage.
b. After bench testing the alternator, install the alternator on the engine, making sure all mounting
surfaces are free
of
corrosion or foreign materials. Torque the alternator retaining bolts to the specifications
listed in the engine manufacturer's manual.
Reissued: 10/11/79
ELECTRICAL
SYSTEM
2G6
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