Piper Cherokee Six - Page 402

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
SECTION
VIIA
POWER
PLANT
(PA-32-300
and PA-32R-300)
7A-1.
DESCRIPTION.
The
PA-32-300
and
PA-32R-300
are
powered
by a
Lycoming
engine
of
300
horsepower.
(Refer
to Power
Plant
Specifications
in Table
II-I.)
The
engine
is
furnished
with
a starter,
60 ampere,
12-volt
alternator,
voltage
regulator,
shielded
ignition
system,
vacuum
pump
drive,
fuel pump,
fuel
injector
and
a
dry paper
type
induction
air
filter.
In
the event
of
air
stoppage
through
the
filter
an alternate
air
source
can
be opened
when
selected
manually
by
the
use of
a lever
in the
cockpit.
The
exhaust
system
for
the PA-32-300
is
stainless
steel
directing
gases
inboard
to
mufflers
located
directly
under
the engine.
The large
muffler
with a
heater
shroud
provides
heat for
both
the cabin
and defrosting.
The
exhaust
system
for
the PA-32R-300
consists
of
three individual
mufflers
combined
into
one unit.
Each
set of
opposing
cylinders
feeds
into
one muffler.
A heat
shroud
encircles
the
complete
unit
to provide
heat for
both
the cabin
and
defrosting.
The
engine
is
provided
with
a
constant
speed
propeller
controlled
by
a governor
mounted
on
the engine
supplying
oil
through
the
propeller
shaft at
various
pressures.
7A-2.
TROUBLESHOOTING.
Troubles
peculiar
to
the
power
plant
are
listed
in
Table
VIIA-I
along
with
their
probable
causes
and
suggested
remedies.
When
troubleshooting
the
engine,
ground
the magneto
primary
circuit
before
performing
any checks
of
the
engine.
7A-3.
PROPELLER.
7A-4.
REMOVAL
OF PROPELLER.
a.
Insure
master
and
magneto
switches
are
off.
b.
Move
fuel
selector
to off
position.
c.
Place
mixture
control
in
idle
cut-off.
d.
Note position
of
components
to
facilitate
reinstallation.
e. Remove
screws
attaching
spinner
cuff
and
spinner
assembly
and
remove
spinner.
f.
Remove
the
safety
wire
from
the
six propeller
mounting
bolts
and
remove
the bolts
and
propeller.
g.
Place
a
drip
pan
under
propeller
to
catch
oil
spillage,
remove
propeller.
h.
It is
recommended
that for
severe
damage,
internal
repairs
and
replacement
of
parts,
the
propeller
should
be referred
to the Hartzell
Factory
or Service
Station.
i. Grease
blade
hub through
zerk
fittings.
Remove
one of
the two
fittings
for each
propeller
blade,
alternate
the
next
time. Apply
grease
through
the
zerk
fitting until
fresh
grease
appears
at the
fitting hole
of the
removed
fitting.
Care should
be taken
to avoid
blowing
out
hub
gaskets.
POWER
PLANT
Revised:
7/28/75
2G6