Cessna T188C - Removal and Installation

MODEL 188
& T188 SERIES
SERVICE
MANUAL
NOTE g. Using all new O-rings, install bowl (13). Note
that
step-washer at
bottom of bowl
is installed
so
The fuel strainer can be disassembled. that step seats against O-ring. Install strainer drain
cleaned and reassembled without remov- tube.
ing
the assembly from the aircraft.
h. With
shut-off valve in "ON" position,
check for
(Refer to
paragraph 12-46.)
leaks and proper
operation of quick-drain
valve.
i. Safety
wire
bottom
nut
to top
assembly.
Wire
12-45. REMOVAL AND INSTALLATION. must have right hand wrap, at least 45 degrees.
a. Remove plate
immediately
aft of hopper
on the
lower fuselage
skin for access.
12-47.
AUXILIARY FUEL
PUMP.
WARNIN 12-48. DESCRIPTION. The electric auxiliary fuel
pump
is a 35 gallon-per-hour
pump,
supplying
a
Refer to procedures outlined on page vi prior pressure of 23 - 24 psi. On metal tank installations,
to performing maintenance to fuel system the pump is mounted on the aft side of the firewall.
components.
On rubberized cell installations,
the pump is located
in the lower
fuselage, immediately
forward
of the
b. On aircraft thru serial 1880572 place shut-off rudder pedals. An integral bypass and check valve
valve in "OFF" position and
drain fuel from strainer
incorporated in the pump assembly
permits fuel flow
and lines with quick drain
control.
through the pump, even
when the pump is not oper-
c. Disconnect all
fuel lines and controls from
ating, but prevents
reverse flow. A separate over-
strainer.
board
drain line from the pump prevents
entry of
d. Disconnect all fuel lines and electrical connec- fuel into the electric motor in the event of an internal
tions from fuel
pump.
leak.
e. Remove
screws
securing strainer.
f. Loosen clamp securing pump. 12-49. REMOVAL AND INSTALLATION. (METAL
g. Remove
pump and strainer as a
unit.
TANK INSTALLATION).
h. Reverse
the preceding steps for installation.
a. Remove
side panels just aft of
firewall.
i.
Beginning with aircraft 18800573
drain fuel from b.
With shut-off valve in "OFF"
position, drain
wing cells
at cell drain plugs.
fuel from pump
and lines with strainer drain
control.
j. Place shut-off valve in "ON" position, drain c. Disconnect all fuel lines and electrical connec-
fuel from reservoir
tank and lines with strainer
tions
from pump.
drain control. To
expedite fuel draining, remove
d. Loosen
clamps securing pump.
plug from bottom
of reservoir tank.
e. Remove fuel pump.
k. Disconnect control and fuel line from shut-off f. Reverse the preceding steps for installation.
valve.
1.
Disconnect control from strainer.
12-50.
REMOVAL AND INSTALLATION.
(RUBBER-
m. Remove
screws securing strainer.
IZED CELL INSTALLATION).
n. Disconnect all fuel lines and electrical connec- a Remove plate immediately aft of hopper on the
tions from fuel pump. lower fuselage skin for access.
o. Loosen
clamp
securing
pump.
p. Remove shut-off valve, fuel strainer and pump WARNING
from aircraft as a unit.
q. Reverse the preceding steps for installation. Refer to procedures outlined on page vi prior
to performing maintenanc to fuel system
12-46. DISASSEMBLY
AND ASSEMBLY.
(See fig-
components.
ure 12-9).
a. With shut-off
valve in "OFF" position,
drain b. On aircraft
thru serial 1880572 place
shut-off
fuel
from bowl and lines with quick-drain
control. valve in
"OFF" position and drain fuel
from strainer
and lines
with quick
drain control.
WARNING
c. Disconnect all
fuel lines and electrical
connec-
Refer to procedures outlined
on page vi prior
tions
from fuel pump
Refer to procedures outlined on page vi prior d. Disconnect all fuel lines and control from
to performing
maintenance
to fuel system
strainer.
components.
e. Remove screws securing
strainer and loosen
clamp
securing
pump.
b. Remove
plate immediately
aft of
hopper on the
f. Remove
pump and
strainer from
aircraft as a
lower
fuselage skin
for access.
unit.
c. Remove
drain tube,
safety wire, nut,
and
g. Reverse
the preceding
steps for installation.
washer
at bottom of filter bowl and
remove bowl (13). h. Beginning
with aircraft 1880573
drain fuel from
d. Carefully
unscrew
standpipe
(11) and remove.
wing cells
at cell drain
plugs.
e. Remove
filter (9)
and gasket (8).
Wash filter
i. Place
shut-off valve
in "ON" position,
drain fuel
and
bowl in solvent (Federal Specification
P-S-661, from
reservoir tank and lines with
strainer drain
or equivalent) and dry with
compressed air.
control. To expedite fuel draining,
remove plug fror.
f. Using
a new gasket between
filter and top assem-
bottom of reservoir
tank.
bly, install
filter
and standpipe.
Tighten
standpipe
j. Disconnect
control
and fuel
line from
shut-off
only
finger tight.
valve.
12-24
Revision
1