Piper Cherokee Six - Page 439

1.
Loosen
rotor
holding
tool
and
move
the
rotor
back
a
few
degrees;
then
move
it
forward.
Both
lights
should
go
out
to
indicate
opening
of
the
main
breakers
when
the
timing
pointer
is
indicating
within
the
width
of
the
"R"
mark
and
the
red
painted
teeth
are
centered
in
timing
windows.
m.
If
breaker
timing
is
not
correct,
loosen
cam
securing
screw
(refer
to
Figure
7A-34)
and
unseat
main
breaker
cam
from
taper.
Using
11-3031
Retaining
Ring
Pliers
inserted
in
holes
in
cam,
rotate
main
breaker
cam
in
direction
of
rotation
until
left
main
breaker
points
just
open
and
press
cam
onto
taper.
Tighten
screw
to
seat
main
breaker
cam.
n.
Loosen
rotor
holding
tool
to
turn
rotating
magnet
back
a
few
degrees;
then
turn
rotating
magnet
in
normal
direction
of
rotation.
Timing
light
should
go
out
when
timing
pointer
is
aligned
with
"R"
("E"
gap)
mark.
Lock
rotating
magnet
in
position
where
points
just
open.
o.
Loosen
right
main
breaker
securing
screws
and
position
breaker
so
cam
follower
is
pressed
against
cam
with
points
closed.
Tighten
contact
assembly
securing
screws
to
prevent
contact
assembly
from
bouncing
back
when
moved.
Using
a
small
mallet
and
drift,
tap
right
breaker
in
until
points
just
open.
p.
Turn
rotating
magnet
back
a
few
degrees;
then
turn
rotating
magnet
in
normal
direction
of
rotation.
Both
timing
lights
should
go
out
within
one
degree
or
half
the
width
of
"R"
mark
on
rotor.
If
breakers
are
not
properly
synchronized,
reset
right
breaker.
q.
Check
right
main
breaker
contact
for
0.016
±
.004
inch
point
opening
and
torque
right
breaker
contact
securing
screws
to
20-25
inch-pounds.
If
point
opening
is
out
of
limits,
repeat
timing
procedure
setting
left
main
breaker
opening
at
.016
+
.002
inch.
If
right
contacts
open
beyond
.020
inch,
set
left
contacts
closer
to
.018
inch.
If
right
contacts
open
less
than
.012
inch,
set
left
contacts
closer
to
.014
inch.
r.
Using
timing
light,
recheck
timing
to
insure
main
breakers
open
within
one-half
the
width
of
"R"
mark
and
that
retard
breaker
opens
at
correct
degree
setting.
Using
a
wire
feeler
gauge,
check
left
main
breaker
for
.016
±
.002
inch
point
opening
and
right
main
breaker
and
retard
breaker
for
.016
±
.004
inch
point
opening.
NOTE
If
correct
breaker
timing
cannot
be
achieved,
remove
magneto
and
have
it
overhauled.
s.
Check
capacitors
for
looseness
in
the
magneto
cover
of
the
harness
assembly
and
for
any
physical
damage.
The
capacitors
should
be
checked
for
capacitance,
series
resistance
and
leakage.
Capacitance
should
be
0.34
to
0.41
microfarads.
The
use
of
a
Bendix
condenser
tester,
part
number
11-1767-1,
-2
or
-3
or
equivalent
will
simplify
this
test.
Replace
defective
capacitors
and
torque
securing
nut
to
60-70
inch-pounds.
NOTE
Spring
in
capacitor
outlet
may
cause
an
indication
of
a
short
to
ground
if
adapter
lead
is
not
used.
(Refer
to
Paragraph
7A-39,
Step
c,
Note.)
POWER
PLANT
Revised:
7/28/75
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
2H19