Cessna 177 SERIES Service Manual

13-6.
INSTALLATION.
(Refer
to figure
13-1.)
support.
The
bulkhead
must
be
positioned
so the
*~IV~
~~~WARNINO~
ppropeller
blades
will
emerge
from
the spinner
with
WUARNINGI
ample
clearance.
g. Install
spinner.
Be
sure magneto
switch
is in
OFF position
before
turning
propeller.
NOTE
a.
If the
starter
ring gear
support
assembly
(9)
was
Shims
(7) must
be installed
with bevel
edge
removed,
clean
the
mating
surface
of
support
assem-
next to
aft spinner
bulkhead.
bly
and engine
crankshaft.
b.
Place
alternator
drive
belt
in the
pulley
groove
h. Adjust
alternator
drive
belt
tension
as
outlined
of
the
starter
ring
gear
support.
Fit
support
assem-
in
Section
16.
bly over
propeller
flange
bushings
of the
crankshaft.
13-7.
CONSTANT-SPEED
PROPELLER.
The
con-
NOTE
stant-speed
propeller
is a
single-acting
unit in
which
governor-regulated
oil
pressure opposed
by the
nat-
Make
sure
the
bushing
hole
in the
ring
gear
ural
centrifugal
twisting
moment
of
the
rotating
blades
support
that
bears
the
identification
"O,
" is
and
the force
of an
internal
spring
is
used
to obtain
assembled
at
the "0"
identified
crankshaft
the
correct
pitch
for the
engine
load.
Engine
lubrica-
flange
bushing.
This
bushing
is
marked
"0"
ting oil
is
supplied
to
the power
piston
in the
propel-
by an
etching
on
the crankshaft
flange
next
ler hub
through
the
engine
crankshaft.
The
amount
to the
bushing.
The
starter
ring
gear
must
and
pressure
of the
oil supplied
is controlled
by the
be located
correctly
to assure
proper
align-
engine-driven
governor.
An increase
or
decrease
in
ment
of the timing
marks
on
the ring
gear.
throttle
setting
or
a change
in aircraft
attitude
will
affect
the balance
which
maintains
a given RPM.
If
c.
Clean
mating
surfaces
of the
propeller
and
the
throttle
is
opened
further,
or if
the aircraft
speed
starter
ring
gear support
assembly.
is increased,
the engine
RPM
will
try
to increase.
d.
Locate the
top center
(TC)
mark
on the
aft face
The governor
senses
this
and directs
oil
pressure
to
of the
starter
ring
gear
support.
Locate
one
of the
the forward
side
of the piston.
The blades
will be
propeller
blades
over
the TC
mark,
rotate
the pro-
moved to
a higher
pitch
and engine
speed
will
remain
peller
clockwise
(as
viewed from
front
of engine)
constant.
Conversely;
if the throttle
opening
or
the
to the first
bushing
and
install
propeller
and forward
aircraft
speed
is decreased,
the engine
RPM
will
try
spinner
bulkhead.
to
decrease.
The governor
senses
this
and allows
e. Tighten
propeller
mounting bolts
evenly and
oil to drain
from the forward
side of the
piston.
torque
bolts
to 45 lb-ft.
-
Spring
tension
and centrifugal
twisting
moment
will
f. Install
bolts,
washers,
shims
and nuts
attaching
move
the blades
to
a lower pitch
to maintain
the
the
rear spinner
bulkhead
to
the starter
ring
gear
selected
engine
speed.
SHOP
NOTES:
Change
6
13-3

Cessna 177 SERIES Specifications

General

Manufacturer	Cessna
Engine Type	Piston
Wingspan	35 ft 6 in (10.82 m)
Seating Capacity	4
Number Built	4, 295
Engine	Lycoming O-360
Horsepower	180 hp
Maximum Takeoff Weight	2, 500 lb (1, 134 kg)