Installation Of Bearing View; Installation Of Rectifier View; Terminal Assembly (Prestolite) View - Piper Navajo Chieftain PA-31-350 Service Manual

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Figure 1 1-11. Installation of Bearing
Figure 11-12. Installation of Rectifier
c. Reassemble the rectifier mounting plate studs and insulators, making sure they are in the correct
order. (Refer to Figure 11-13.)
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.
Correct assembly of bearing, seal, inner race and spacer is shown in Figure 11-14. Stake the seal in place.
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. Install spacer, woodruff key, fan, pulley, lock washer and
nut. Torque the nut to 35 foot-pounds, using a strap wrench to hold the pulley. Do not install the blast
tube assembly until after the unit has been bench tested.
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 the Alternator Service Test Specification
paragraph.
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NUT
LOCKWASHER
FLATWASHER
FIBERWASHER
END HEAD
INSULATOR
RECTIFIER MOUNTING PLATE
AUXILIARY
TERMINAL
STUD
OUTPUT (+)
TERMINAL TERMINAL
Figure 11-13. Terminal Assembly (Prestolite)
Revised: 10/15/82
ELECTRICAL SYSTEM
NAVAJO CHIEFTAIN SERVICE MANUAL
3D1