Piper Comanche PA-24 Service Manual page 592

PIPER
COMA~CHE
SERVICE MANt:AL
222
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FIGlRE K·8. Fl:EL AIR BLEED I'OlZLE
7C·44
Fuel Air Bleed I'ozzles.
7C -45 Removal Of Fuel Air Bleed Nozzle •. The nOllles must be carefully remo\ed as the\ or the c\ IInde"
ma~ be damaged
a
b
c
d
e
I
Remo\e the top engine
CO\\
1
DI..;connecl \e'nt line from
~hroud b~
('xpanding clamp and remO\ ing line
Disconnect the fuel line from the
nOll
Ie
Remme the spring retamer. spnng and
~hroud
from the n077le
Carefull~
remo\c nonle.
uSing
the correct sile deep socket
Clean and in.;;pecl the n017le as giu'n in paragraph 7C-4ti
7C -46 Cleaning And Inspeelion Of Fuel Air Bleed Nozzle.
a Clean the nOllle \\ilh acetone or
Meth~lelhylki:tone
(MEK) and blo" out all foreign particles \\ith
c()mprc ... sed air in the direction opposite that of fuel
f10v.
Do not us(" "ire or other hard objects to clean
orifice: ..
b
In ... peel the o017le and cylinder threads for nicks. '!)tripping or cross-threading and banered or
rounded hexagons
c In'rect and replace nozzle O-rings found to he cracked. brittle or di .. toned Refer
to
Lycoming
Sen ice Instruction '\'0 1275 for detailed test procedure of air bleed nOllie'!)
7C
-47 Inslallation Of Fuel Air Bleed I'ozzles.
a
It is important for the
nOll
Ie .. to be correctly positioned with the bleed hole facing. upv.ard
b In'tall the n011les and torque to Nllnch·pounds
c A'!)cenain that the O-rings are
propt:rl~
in"ilalled on the non Ie stem and install the nonle shroud
(Refer to FIgure 7C-R I
d Connect the \ent
to
the n071le shroud
~
In,tall the ... pring and '!)pring retainer on the nOllle stem
f Connect the fuel hne to the n017k and ad.lu.,t the connecling. "enl line to align and centt:r the
Inieclor
nOll
Ie \\ith Ihe injector
nOll
Ie .. hroud and secure with Clamps
g Install the top engine cowl
ISSl:ED: 8/18/72
2HIO
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