PIPER
SENECA II
SERVICE MANUAL
NUT
LOCKWASHER
FLATWASHER
FIBERWASHER
INSULATOR
RECTIFIER MOUNTING PLATE
TERMINAL STUD
OUTPUT (+)
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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