Piper Cherokee SIX 260 - Coupling Torques; Spark Plugs.

k.
With
all high
tension
terminal
grommets
seated
against
the
ferrules
in
the
cover,
attach
the bottom
capacitor
lead to
the
right
main
breaker
and
then
the
top capacitor
lead
to
the left
main
breaker.
Position
the cover
on
the magneto
and secure.
Torque
cover
screws
to 30-35 inch-pounds.
1. Carefully
route
the
high tension
spark
plug
leads
away
from any
hot
spots
such
as
manifolds
and
sharp
edges
which
might
cause
heat
damage
or
chafing.
Check
leads
for
proper
location
in
clamps
so when
clamps
are
tightened
the
leads
will
not be
crushed.
Leads
should
be
taut
to prevent
chafing
due to
vibration,
but not
so taut
as
to produce
undue
strain
or
leads.
m.
After
all
leads
have
been properly
routed
and
secured
to
the
engine,
recheck
all
clamp
securing
screws
for
tightness.
Fasten
coupling
nuts
to proper
spark
plugs
and torque
as
specified
in Table
VIIA-II.
Do not
allow
ferrules
to turn
while
torquing
nuts.
TABLE
VIIA-II.
COUPLING
TORQUES
Spark
Plug
Torque
Coupling
Threads
(lb.-in.)
5/8-24
90-95
3/4-20
110-120
7A-47.
SPARK
PLUGS.
7A-48.
REMOVAL
OF
SPARK
PLUGS.
a.
Loosen
the coupling
nut
on
the harness
lead
and
remove
the
terminal
insulator
from
the
spark
plug
barrel
well.
NOTE
When
withdrawing
the ignition
cable
lead connection
from
the
plug,
care must
be
taken
to pull
the
lead straight
out and
in line
with
the centerline
of the
plug
barrel;
otherwise
a
side
load
will be
applied,
which frequently
results
in damage
to
the
barrel
insulator
and
connector.
If the
lead cannot
be
removed
easily
in
this manner,
the resisting
contact
between
the neoprene
collar
and
the barrel
insulator
will be
broken
by
a rotary
twisting
of
the
collar.
Avoid
undue
distortion
of the
collar
and
possible
side loading
of the
barrel
insulator.
b. Remove
the
spark
plug from
the
engine.
In the
course
of engine
operation,
carbon
and other
combustion
products
will
be deposited
on the
end
of the
spark
plug
and will
penetrate
the
lower
threads
to some
degree.
As a result,
greater
torque
is frequently
required
for
removing
a
plug than
for
its installation.
Accordingly,
the torque
limitations
given
do
POWER PLANT
Added:
7/28/75
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
217