Piper Arrow IV Turbo Maintenance Manual page 221

5. 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 24-38.
6. 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.
7. On PA-28RT-201 install spacer, woodruff key, fan, pulley, lockwasher and nut. Torque the nut to 35
foot-pounds, using a strap wrench to hold the pulley.
8. Install the brush and holder assembly and retaining screws. Spin the rotor and check for interference
between the brush holder and rotor. Check between the field terminal and ground with an ohmmeter. The
ohmmeter must indicate the amount of rotor resistance listed with Alternator Service Test Specifications.
TESTING OF ALTERNATOR.
1. Wiring connections for bench testing the alternator are shown in Figure 24-39. Refer to the individual
specification pages for output test figures. Adjust the carbon pile if necessary, to obtain the specified voltage.
2. After bench testing the alternator, install the safety wire and install the alternator on the engine.
Always refer to the wiring diagram when installing the alternator
or testing the alternator.
Do not test alternators used on PA-28RT-201T at full rated output
for more than 30 seconds unless adequate air pressure for
cooling is supplied.
ALTERNATOR SERVICE TEST SPECIFICATION.
Prestolite specifications for the 14-volt alternators installed on PA - 2 8 RT- 2 0 1 T. Prestolite alternators are
also used on PA-28RT-201 airplanes equipped with air conditioning.
EFFECTIVITY:
PRESTOLITE ALTERNATOR
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—NOTE—
—CAUTION—
1J5
24-33-09
Page 24-34
Revised: July 13, 1983