Piper Cherokee Six - Page 572

363
364
Figure
10-24d.
Removal
of
Drive
End
Head
Figure
10-24e.
Removal
of
End
Head
Bearing
f.
To
remove
the
drive
end
head
from
the
rotor
shaft,
use
a
puller
that
grips
on
the
bearing
retainer
plate
as
shown
in
Figure
10-24d.
Do
not
attempt
to
remove
by
supporting
the
end
head
and
pressing
on
the
shaft,
as
this
may
result
in
distortion
of
the
end
head
or
stripping
of
the
retainer
plate
screws.
Remove
the
three
retainer
plate
screws
and
press
the
bearing
out
of
the
end
head.
(Refer
to
Figure
10-24e.)
10-27h.
INSPECTION
AND
TESTING
OF
COMPONENTS.
Upon
completion
of
the
disassembly,
all
parts
should
be
cleaned
and
visually
inspected
for
cracks,
wear
or
distortion
and
any
signs
of
overheating
or
mechanical
interference.
a.
Rotor:
The
rotor
should
be
tested
for
grounded
or
shorted
windings.
The
ground
test
can
be
made
with
test
probes,
connected
in
series
with
a
110
volt
test
lamp,
an
ohmmeter
or
any
type
of
continuity
tester.
(Refer
to
Figure
10-24f.)
There
must
not
be
any
continuity
between
the
slip
rings
and
the
rotor
shaft
or
poles.
To
test
for
shorted
turns
in
the
rotor
winding,
connect
a
voltmeter,
ammeter
and
rheostat
as
shown
in
Figure
10-24g,
or
use
an
ohmmeter.
Rotor
current
draw
and
resistance
are
listed
in
10-27k,
Alternator
Service
Test
Specifications.
Excessive
current
draw
or
a
low
ohmmeter
reading
indicates
shorted
windings.
No
current
draw
or
an
infinite
ohmmeter
reading
would
indicate
an
open
winding.
b.
Rectifiers:
A
diode
rectifier
tester
will
detect
and
pinpoint
open
or
shorted
rectifiers
without
going
through
the
operation
of
disconnecting
the
stator
leads.
However,
if
a
tester
is
not
available,
test
probes
and
a
No.
57
bulb,
connected
in
series
with
a
12
volt
battery,
can
be
used
in
the
following
manner.
Touch
one
test
probe
to
a
rectifier
heat
sink
and
the
other
test
probe
to
a
lead
from
one
of
the
rectifiers
in
that
heat
sink.
Then
reverse
the
position
of
the
leads.
The
test
bulb
should
light
in
one
direction
and
not
light
in
the
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
3B20