Cessna 177 SERIES Service Manual

I5-70.
WING
LEVELER.
THRU
AIRCRAFT
17702049
15-72.
RIGGING.
:Refer
to tirure
i5-8.)
(Refer
to figure
15-8.)
a. Rudder
controls
and
rudder
rust
be
in
neutral
position
before
clamps
(3i
are
secured
to
cables.
15-71.
DESCRIPTION.
The
wing
leveler
control
b.
While
maintaining
servos
i2)
in their
neutral
system.
consisting
of a
turn
coordinator,
pneu-
position.
remove
slack
from
servo
cables
by movinz
matic
servos.
connecting
cables
and
hose
mav
be
clamps
(3! a:,
on rudder
cables
until
servo
cables
installed.
The
turn
coordinator
,gro senses
changes
become
taut.
then
secure
clamps
(3'
to cables.
in roll
attitude,
then electrically
meters
vacuum
c.
Connect
springs
(4)
to cable
ends,
then
pull
power
from
the
engine-driven
vacuum
pump
to the
cables
through
clamps
(3) until
servos
are
fully
cylinder-piston
servos.
operating
ailerons
for
lateral
extended
but
not
stretched.
stability.
In addition
to aileron
servos,
two
servos
d. Position
pen
union
clamps
(5)
on rudder
cables
are
connected
to
the
rudder
cables
and provide
vaw
8.00
inches
aft of
clamp
[3)
and
secure.
Torque
stability
that prevents
excessive
changes
in
heading
clamps
to
80 pound-inches.
in turbulent
air.
Manual
control
of
system
is
afford-
e. Aileron
servos
require
no
rigging
if components
ed
by the
roll
trim
knob.
Roll
trim
should
not be
are installed
as
illustrated
in figure
15-8.
used
to correct
faulty rigging
or
"wing heaviness."
Manual
override
of system
may be
accomplished
15-73.
ECONOMY
MIXTURE
INDICATOR.
without
damage to aircraft
or
system. The
ON-OFF
valve
controls
vacuum
supply
to distributor
valve,
15-74.
DESCRIPTION.
The
economy
mixture
indi-
but
does
not
affect
electrically
operated
turn
coor-
cator
is an
exhaust
gas temperature
(EGT)
sensing
dinator
gyro.
Installation
of
wing
leveler
does
not
device
which
is used
to aid
the
pilot in
selecting
the
change
vacuum
relief
valve
settings.
Refer
to
most
desirable
fuel-air
mixture
for
cruising
flight
appropriate
publication
issued
by
the manufacturer
at
less
than
757 power.
Exhaust
gas
temperature
for
trouble
shooting
procedures.
(EGT)
varies
with
ratio
of fuel-to-air
mixture
enter-
ing
the
engine
cylinders.
Refer
to
the Owner's
Manual
for operating
procedure
of the
system.
15-75. TROUBLE SHOOTING.
TROUBLE
PROBABLE
CAUSE
REMEDY
GAGE
INOPERATIVE
Defective
gage,
probe
or
Repair
or
replace
defective
circuit.
part.
INCORRECT
READING.
Indicator
needs
calibrating.
Calibrate
indicator
in
accordance
with
paragraph
16-57.
FLUCTUATING
READING.
Loose,
frayed
or
broken
Tighten
connections
and
re-
lead.
permitting
alternate
pair
or
replace
defective
make
and
break
of
circuit.
leads.
15-76.
CALIBRATION.
When a
new EGT
gage
or
NOTE
probe
is
installed
accomplish
the following
steps:
a.
Before
flight
remove
the decorative
cover
on
The
4/5 scale
increment
setting
provides
right
hand
instrument
panel
and
temporarily
install
the
reference
indicator
point
for relative
the
EGT indicator
with
one,
screw.
temperature
indications
for normal
cruise
b.
Test
fly the
airplane
and
establish
75%
power
power
settings
within
range
of instrument
in
level
flight.
Carefully
lean
the
fuel
mixture
to
scale.
achieve peak
EGT. Remove
the
EGT indicator
from
the
panel
and
adjust
the
screw
on the
back
of
the
c.
After
flight
reinstall
indicator
and
decorative
instrument
beneath
the
plastic
cap
with
a small
blade
cover.
screwdriver
to place
the EGT
indicator
hand
over
the
The
yellow
adjustable
hand
on
indicator
is for
use
to
4/5
scale
increment
of
the
indicator
scale.
Turning
mark
a
reference
temperature
setting.
the
screw clockwise
increases
the
reading and
coun-
terclockwise
decreases
the reading.
The adjusting
15-77
REMOVAL
AND
INSTALLATION.
Removal
screw
has
a adjustment
range
of
approximately
600°F
of
the indicator
is
accomplished
by removing
the
or
2 increments
in either
direction.
Stops
are
pro-
mounting
screws
and disconnecting
the leads.
Tag
vided
on the
adjust
screw which
control
the
above
leads
to facilitate
installation.
The
thermocouple
and
should
not
be forced
past
stops
as it
will affect
probe
is secured
to the
exhaust
stack
with
a
clamp.
calibration
of the
Unit
Scale.
-
When
installing
probe.
tighten
clamp
to 45
pound-
inches
and
safety
as
required.
Chanre
7
15-27/(15-28
blank)

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)