Piper SARATOGA PA-32-301 Maintenance Manual page 184

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
ALTERNATOR NOMENCLATURE.
I. Bearings. These units have a sealed ball bearing at the drive end and a two-piece roller bearing at the
slip ring end. The inner race is pressed onto the rotor shaft and the rest of the bearing is in the slip ring end head.
When the unit is assembled. the inner race aligns with the bearing. When the bearing is replaced, the new inner
race must be installed on the rotor shaft.
2. Lubrication:
The slip ring end bearing should be lubricated whenever the alternator
is disassembled.
The bearing should be thoroughly
cleaned and repacked with Shell Alvania No. 2 or an equivalent bearing
lubricant. The cavity behind the bearing should be packed one-third to one-half full with the same lubricant.
3. Brushes: These units have a separate brush holder assembly that is installed after the alternator
has
been assembled. The brush holder has a small hole that intersects the brush cavities. Use a pin or a piece of
wire. as shown in Figure 24-14 to hold the brushes in the holder during assembly. Remove the pin after the
brush holder retaining screws have been tightened. Make a continuity check to be sure the brushes are seated
against the slip rings.
4. Drive Pulley: Torque the drive pulley retaining nut to 35 foot-pounds
(minimum) to 40 foot-pounds
(maximum).
ALTERNATOR
SERVICE TEST SPECIFICATIONS.
CHART 2403. ALTERNATOR SPECIFICATIONS
(PRESTOLITE)
Alternator Model
Voltage
ALY 6422
12-volts
Rated Output
Ground Polarity
60 amperes
Negative
Rotation
Bi-Directional
Rotor: (70- to 30 F
Current Draw
Resistance
Output Test: (70 to 80)
Volts
Amperes Output
Alternator RPM
2.4 to 4.0 amps
@
12.0-volts
3.5 to 5.0 ohms
14.0
13.0
2000 min.
14.0
47.0
4000 min.
EFFECTIVITY: PRESTOLITE
24-31-11
Page 24-19
Revised: August 23. 1982
1H16