Brush Installation; Internal Wiring Diagram - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
371
C455
ALTERNATOR
END VIEW
SIDE VIEW
Figure 11-29. Brush Installation
Figure 11-30. Internal Wiring
Diagram
uity check to be sure the brushes are seated against the slip rings.
d. Drive Pulley. Torque the drive pulley retaining nut to 35 foot pounds.
e. Ventilation:
These units use a slip ring end cover that has a hose type
connection
for air pressure ventilation. Remove this cover when bench testing
the alternator.
11-36. ALTERNATOR SERVICE TEST SPECIFICATIONS. PRESTOLITE Specifications
for the 28 volt alternators installed as standard equipment on PA-31 series airplanes are as
follows:
Alternator Model
Voltage
Rated Output
ALU8403 or ALU8421
24-volts
70 amperes
Ground Polarity
Negative
Reissued: 10/12/79
Effectivity
PRESTOLITE
ELECTRICAL SYSTEM
4C1