Piper COMANCHE PA-24-180 Service Manual page 464

7C-44 Fuel Air Bleed Nozzles.
7C-45 Removal Of Fuel Air Bleed Nozzles. The nozzles must be carefully removed as the! or the clxhnders
ma\ be damaged
a
Remose the top engine covl
b
Disconnect vent line from shroud b! expanding clamp and remoming line
c Disconnect the fuel line from the nozzle
d
Remove the spring retainer. spring and shroud from the no77le
e
Caretully remote nozzle. using the correct size deep socket
Clean and inspect the nozzle as gisen in paragraph 7C-46
7C-46 Cleaning And Inspection Of Fuel Air Bleed Nozzle.
a
Clean the nozzle slth acetone or Methylethvlketone (MEK) and blow out all foreign particles with
compressed air in the direction opposite that of fuel flow Do not use wire or other hard objects to clean
orifices
b
Inspect the no77le and c!linder threads for nicks. stripping or cross-threading and battered or
rounded hexaeons
c
inspect and replace nozzle O-rings found to he cracked. brittle or distorted Refer to Lycoming
Service Instruction No 1275 tor detailed test procedure of air bleed nozzles
7C-47 Installation Of Fuel Air Bleed Nozzles.
a
It is important for the nozzles to be correctlx positioned with the bleed hole facing upuard
b
Install the nozzles and torque to 6) inch-pounds
c
Ascertain that the O-rings are properly installed on the nozzle stem and install the nozzle shroud
(Refer to Figure 7C-X )
d
Connect the vent to the nozzle shroud
e
Install the spring and spring retainer on the noz7le stem
f
Connect the fuel line to the no77e and adlust the connecting ent line to align and center the
inlector nozle .ith the inector nozzle shroud and secure Xlth clamps
g Install the top engine cowl
ISSUED: 8/18/72
POWER PL
O
PIPER COMANCHE SERVICE MANUAL
ZnlU