PIPER
COMANCHE
SERVICE
MANUAL
e
To
reinstall
pump.
insert the
pump
body
through
the panel. install the piston assembly
and
secura
the face
nut.
Position the
pump
and
secure the locknut behind the panel Connect the supply lines. _
8-34.
Prime
Jets.
a
To
remove the prime jets. disconnect the supply line from each jet With a deep socket
and
light
pressure.
remove the jet from
the
cylinder
b
To
clean the jet. soak
in
a
carbon
remover solution long
enough
to loosen any dirt
and
blo"
clean
"ith
air pressure
Do
not use
sharp
objects
or
wire brush to clean
the
jet
tube
c.
Install the jet finger tight
to
assure
that
the
threads
ar:
not crossed
and
then
torque
60 to
125
inch-pounds Align
and
install the fuel supply lines. tighten
to
a
mug
fit.
>';OTE
Should
further fuel stoppage
of
the primer system exist. check the
supply lines for stoppage. bent
or
collapsed walls
8-35
Fuel
Flow Gauge
Damper
(Fuel
Injection System). There are two locations along the fuel flow gauge
pressure line which have a
damper
installed
One
i,
between the fire wall
and
the gauge. while the other
is
between the flow divider
and
the engine baffle
The
dampers
consist
of
stainless steel wire installed inside
the line at the two locations described
above. These
dampers
are in the line to prevent surging of the flow
gauge.
and
must not be removed except for cleaning purposes only
8-31>
Troubleshooting.
Troubles peculiar to the
Comanche
fuel system are listed
in
Table VIII-IV
along
with their
probable
cause,
and
suggested remedies When troubleshooting. check from the
fU.
supply to the items affected. If no trouble
is
found by this method. the trouble probably exists insi
individual pieces of equipment.
they may then
be
removed from the aircraft and
an
identical unit 0
units. teSled
and
kno\\n
to be good. installed in their place
Troubleshooting
the fuel quantity indicator
may
be
found in Section XI. Instruments
The
electrical diagrams for each fuel system may
be
found
in
Section IX. Electrical System
2J16
FliEL
SYSTEe
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