Cessna 177 SERIES Service Manual

one
end
of which,
is a rheostat
wiper.
The
verti-
labeled
"LEFT,
BOTH
ON and
RIGHT."
Valve
re-
cal motion
of
the fuel
causes
angular
travel
of
the
pair
consists
of replacement
of seals,
springs,
balls
float
which
increases
and/or
decreases
the amount
and
other
detail
parts.
Figure
12-6
illustrates
the
of electrical
resistance
in the
circuit.
The resis-
proper
relationship
of parts
and
may be
used as
a
tance
regulates
the amount
of
needle
deflection
which
guide
during
disassembly
and assembly.
indicates
fuel
level.
Incorrect
fuel
quantity
indica-
tion
could
result
on some
early
aircraft,
caused
by
12-28.
REMOVAL
AND INSTALLATION.
contacting
the
transmitter
float arm
with
the
fuel
a. Completely
drain
all
fuel from
wing
bays,
fuel
nozzle.
Single-Engine
Service
Letter
SE69-25
de-
strainer,
lines
and valve.
(Observe
the
precautions
scribes
a redesigned
fuel
quantity
transmitter
which
in paragraph
12-3.)
is
available
from
the
Cessna
Service
Parts
Center.
b.
Remove
access
plates
in
floorboard
and
fuselage
This
transmitter
locates
the
float
arm
further
inboard
skin
in area
of selector
valve.
from
the filler
neck
opening
where
it cannot
be
reach-
c.
Remove
selector
valve
handle
and
cover.
ed with
a fuel
nozzle.
Later
aircraft
are equipped
d. Disconnect
and
cap or
plug
all fuel
lines
at sel-
with
a filler
neck
guard
which
extends
further
into
ector
valve.
the
fuel
bay to
protect
the float
arm.
e.
Remove
screws
attaching
valve
to support
brac-
ket
and remove
valve
through
access hole.
12-22.
REMOVAL
AND
INSTALLATION.
Refer
to
f. Reverse
the preceding
steps
for
installation.
Section
15
for removal,
installation
and
calibration
of
Prior
to
reinstalling
access
plates,
service
fuel
bays
the fuel
quantity
transmitters.
and
check
for
leaks.
12-23.
FUEL
RESERVOIR
TANK.
12-29.
FUEL
SHUT-OFF
VALVE.
12-24.
DESCRIPTION.
A fuel
reservoir
tank
is in-
12-30.
DESCRIPTION.
The fuel
shut-off
valve
is
a
stalled
in
the lower
right
fuselage
immediately
aft
two
position
ON-OFF
valve
located
forward
of the
of the
firewall.
The
tank has
three
fuel line
con-
pedestal
immediately
aft of the
firewall.
The
valve
nections;
one
from the
fuel selector
valve, one
to the
control
knob
is
located
at the top
left of
the pedestal
fuel
shut-off
valve
and
one teed
into
the right
fuel
bay
directly
below
the instrument
panel
and is
safetied
vent
line.
A drain
plug/valve
is installed
in
the bot-
to its
mounting
bracket
in
the "ON"
position
with
.018
tom
of the
tank
for draining
trapped
water
and sedi-
inch
diameter
mild
steel
safety
wire
which
will break
ment from
the fuel
system.
easily
if knob
must
be pulled
"OFF"
in an
emergency.
Valve repair
consists
of replacement
of seals,
12-25.
REMOVAL
AND
INSTALLATION.
(See
fig-
springs,
balls
and
other
detail
parts.
Figure
12-6
ure 12-2.
)
illustrates
the proper
relationship
of parts and
may
a. Completely
drain
all fuel
from
wing
bays,
fuel
be
used
as a guide
during
disassembly
and
assembly
strainer,
valves
and
reservoir
tank.
(Observe
pre-
of these
valves.
cautions in
paragraph 12-3.
)
b.
Remove
pedestal
cover.
12-31.
REMOVAL
AND INSTALLATION.
c.
Remove
rudder
bar shields.
a.
Completely
drain
all fuel
from
wing bays,
fuel
d. Slack
off
cable tension
by
loosening
rudder
cable
strainer,
lines
and valve.
(Observe
the
precautions
turnbuckles
and disconnect
cables
from
rudder
bars.
in
paragraph
12-3.)
e. Remove
the
bolts
through
the
rudder
bar
bearing
b.
Remove
control
from
valve
arm.
blocks
and pull
the
rudder bar
assembly
aft
for access
c. Disconnect
and cap
or plug
fuel
lines at
valve.
to reservoir.
d. Remove
bolts
attaching
valve
to firewall
and
re-
f.
Disconnect
and
cap
or
plug
all fuel
lines
at
res-
move
valve.
ervoir.
e.
Reverse
the
preceding
steps for
installation.
g.
Remove screws securing
reservoir to
floorboard Service
fuel bays and check
for leaks.
and lift
out reservoir.
h. Reverse
the
preceding
steps
for
installation.
12-32.
FUEL
STRAINER.
Prior
to reinstalling
equipment
removed
for
access,
service
fuel
bays
and check
for leaks.
12-33.
DESCRIPTION.
The
fuel strainer
is
mounted
i. Refer
to Section
10
to rig rudder
system.
on
the firewall
in
the engine
compartment
and is
en-
closed by
a cooling shroud.
The
strainer
is equip-
12-26.
FUEL
SELECTOR
VALVE.
ped
with a quick-drain
valve
which
provides
a means
of draining
trapped
water
and sediment
from the
fuel
12-27.
DESCRIPTION.
A three
position
fuel selector
system.
The
quick-drain
control
is operated
through
valve
is
located
in
the floor
area
between
the
pilot
an
access
door
in the
upper
aft right
cowl.
and
copilot positions.
The
positions
on the valve
are
12-12
Change
5

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)