Piper Cherokee Six - Page 570

1240
Figure
10-24a.
Exploded
View
of Alternator
b. The
slip
ring end
head
provides
the
mounting
for
the
rectifiers
and
rectifier
mounting
plate,
output
and
auxiliary
terminal
studs,
and
the brush
and
holder
assembly.
The slip
ring
end head
contains
a roller
bearing
and
outer
race assembly
and a grease
seal.
c. The
rectifiers
used
in
these units
are
rated
at 150
peak
inverse
voltage
(P.1.V.)
minimum
for transient
voltage
protection.
Three
positive
rectifiers
are mounted
in the
rectifier
mounting
plate
while the
three
negative
rectifiers
are
mounted
in the
slip ring
end
head.
Each
pair of
rectifiers
is connected
to a stator
lead
with high
temperature
solder.
The
stator
leads
are
anchored
to the
rectifier
mounting
plate
with
epoxy
cement
for vibration
protection.
d.
The stator contains
a special
lead which
is connected
to the center
of the
three phase
windings.
The stator
has
been
treated
with a
special
epoxy
varnish
for high
temperature
resistance.
e. The
rotor
contains
the slip
ring
end bearing
inner
race
and spacer
on
the slip
ring end
of
the shaft.
The
rotor
winding
and winding
leads
have
been
specially
treated
with
a high
temperature
epoxy cement
to
provide
vibration
and
temperature
resistance
characteristics.
High temperature
solder
is used
to secure
the
winding
leads to
the slip
rings.
f.
The drive
end head
supports
a sealed,
prelubricated
ball
bearing
in which
the drive
end of
the
rotor
shaft rotates.
10-27f.
OVERHAUL
OF ALTERNATOR.
When
repairing
the
alternator,
complete
disassembly
may not
be required.
In
some cases
it will
only be necessary
to
perform
those
operations
which
are required
to effect
the repair.
However,
in this
section,
the complete
overhaul
is covered
step-by-step
to provide
detailed
information
on each
operation.
In actual
service
practice,
these
operations
may
be used
as required.
ELECTRICAL SYSTEM
Issued:
8/17/72
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
3B18