PIPER
COMANCHE
SERVICE
MANUAL
d.
Aher
falling
with preserv:ati.., oil.
the
inje"",r
should be protected from
dust
""d
dirt
""d
given
suc:h
protection
apinst
moisture as
c:Wn&ac
conditions
at
the
point
of
It0rate: require:.
tn
most
c:ases,
storin,
the
.nit
in • dry
ua
will be mfficient.
e. If
the
unit
is
to
be
stoml
ncar
or
shipped over salt water.
the
foUowing p<ecaations should be
observed,
1.
Spray
the
exterior
of
tbe
inje"",r
with aD approved preservative oil.
2. Pack in • dustproof container. wrap
the
concWter with moisture and
vaporl'roof
materiLI and
seal.
Pick
the
wrapped
unit in I suitable shippinJ
.....
Pack • one-half
pOUDd
bOJ
of
silica
Jd
crystals in
the
dustproof
cont:aiDer with injector.
The
bq-must
IIOt
touch
the
inje"",r.
CAUTION
Extreme caution should be exercised
wh.,.
handling
or
workiDg
around
the
injector to prevent oil
or
fuel from entering
tbe
&ir
..
etions
of
the
injector. As explained previously.
damage
to
tbe
&ir
diaphnp
will
result. Fluid can easily
enter
the
&ir
oeetian
of
the
injector through
the
impact tubes or
the
annular groove around
the
YCfttun.
For
this reason.
a protective
plate should be instaUed
On
the
scoop mounting flange
when performing rou.tine maintenance
011
the
engine. such
:as
washing
down
the engine
and
&ir
scoop.
servicinJ
tbe
&ir fUter (surplus oil
on
the
dement),
or wben injecting preservative into
the
engine prior
to
storing
or
shipplDll·
78·19. Preparation
Of
Fuel injectOr
For
Service. Fuel injectors
thot
have been prepared for storage should
undergo the foUowinJ procedures before beinJ placed
in service.
..
Remove and clean toe fuel inlet strainer assembly and reinstall.
b. Inject clean
fud
into
the
fuel inlet connection with
the
fuel outletS uncapped until clean fuel flows
from
the outlets. Do
not
exceed 1 S psi inlet pressure.
n·lO.
Installation
Of
F.d
InjectOr.
I.
Install fuel injector with gasket on
mountinJ
pad.
b.
Install air
box
bracket on the [wo lower injector mounting studs
J.nd
sccure bracket and injector
urut
WIth
washen,
nues and
pallocknuu.
c.
Connect fuel lines to fuel injector unit.
d. Connect
thronle
and
mixture
control cables to control arms
""d
adjust per paragraph 78·31.
c.
InstaU &ir
box
clamp assembly and back plate on fuel injector inlet.
f. Secure back plate
to
suppOrt
bracket
and
clamp assembly with screws and safety.
g.
Secure cla.mp at the injector inlet with 2 boltS. washen. nuts. and
cotter
pins.
h.
Install filter and air box
on
back pla.te and Kcure
with
carnloc fasteners.
I.
Connect and secure
~r
intake hose and drain.
if
removed.
J.
Install
bottom
cowling.
POWER PLANT
ISSUED:
8/18/72
2
F9
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