Piper PA-24 Comanche Service Manual page 413

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PIPER COMANCHE SERVICE MANUAL
d.
After filling with preservative oil. the injector should be protected from dust and dirt and Jiven
such protection apinst moisture
IS
climatic conditions at the paine of stance requite. In mose cases.
searing the unit in a dry
ala
will be sufficiene.
e. If the. unit is eo be stored
neg
or shipped over sale .wacer. the foUowiJII precautions should be
observed.
1.
Spray the txterior of the injectOr widl
aD
approved pmctVacive oil.
2. Pack
in
a dusrproof cOllcaiDcr. wrap the concaiacr with moimare and vapor-proof material and
seaL Pack the wrapped unit
in
a suitable sbippinl casc. Pack a one-ha!f pound
bac
of silica
pi crystaLs
in the
dustproof conainer with injector. The baI.must noc touch the injeC'tOr.
CAtmON
Exueme caution should be acrciscd wben handlin, or working uound
the injector to prevent oil or fuel from enteri.n& the air sections of the
injector. As cxpWacd prcv1ously,
dam.
to the air diaphrapn will
result. Fluid c:u
easily
enter the air section of the injector throlllh the
impa.et tuba or the annular sroove around the venturi. For this rnson.
a procective plate should be insta1lccl on the scoop mountin. flange
when pcrfonnin. routine maintenance on the enaJne. such
IS
wuhina
dawn the rnpne and air scoop. seMl."ing tbe
air
filter (surplus oil on the
clemenc). or when injcctinl pracrvative intO the ename prior eo scoriDl
or sbippinl'
78-29. Preparation Of Fuel Injector For Service. Fuel injectors thu have been prepated for scorage should
underlo the foUowiJta procedura before bcm, placed in $CIVice.
a. Remove and clean the fuel inlet strainer uscmbly and reinsuJl.
b. Inject dean fuel inca the fuel inlet connectioll with the fuel oudea uncapped until clean fuel flows
from the oudets, 00 noc exceed IS psi iDlet prcuurc.
iB-30. InscaUadoa Of Fuel InjectOr.
a.
Innall fuct injeCtor with psket
on mouncinl pad.
b. Install air box bracket on the
twO
lower injector mounting studs .utd secure bracket and injector
unic with wuhcn. nuts and pallocknuu.
c. Connect {uellines to fuel injector unit.
d. Connea throttle and mixture control cabin to contrOl arms and adjust per puagraph 18-31.
e.
Install air box clamp uambly and back place on fuel injector inlet.
f. Secure back plate to support bracket and clamp assembly with
SCRWS
and safety.
i.
Secure c1a.mp at the injector inlet with 2 bolts. washcn. :tuts, and cotter pins.
h.
Install filter and air box on back plate and secure with esmloc fasteners.
I.
Connect and secure air intake hose and drain, if removed.
J. Install bottom l:owling.
POWER PLANT
ISSUED: 8/18172
2
F9