Preparatin For Storage; Installation Of Fuel Injector - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
8-62. PREPARATION FOR STORAGE. Any unit taken out of service, or units being returned for
overhaul, must be flushed with preserving oil (Specification MIL-O-6081, Grade 1010), using the following
procedure:
a. Remove plugs and drain all fuel from the injector. If available, apply 10 to 15 psi air pressure to
the fuel inlet until all fuel is discharged from the injector.
b. Replace plugs and apply flushing oil filtered through a 10 micron filter at 13-15 psi to the
injector fuel inlet until oil is discharged from the outlet.
c. Replace fuel inlet shipping plug.
CAUTION
Do not exceed 15 psi air pressure as internal damage to the
injector may result.
d. After filling with preservative oil, the injector should be protected from dust and dirt and given
such protection against moisture as climatic conditions at the point of storage require. In most cases,
storing the unit in a dry area will be sufficient.
e. If the unit is to be stored near or shipped over salt water, the following precautions should be
observed:
1. Spray the exterior of the injector with an approved preservative oil.
2. Pack in a dustproof container, wrap the container with moisture and vapor-proof material,
and seal. Pack the wrapped unit in a suitable shipping case. Pack a one half pound bag of silica gel crystals
in the dustproof container with injector. The bag must not touch the injector.
CAUTION
Extreme caution should be exercised when handling or working
around the injector to prevent oil or fuel from entering the air
sections of the injector. As explained previously, damage to the air
diaphragm will result. Fluid can easily enter the air section of the
injector through the impact tubes or the annular groove around
the venturi. For this reason, a protective plate should be installed
on the scoop mounting flange when performing routine
maintenance on the engine, such as washing down the engine and
air scoop, servicing the air filter (surplus oil on the element), or
when injecting preservative into the engine prior to storing or
shipping.
8-63. INSTALLATION OF FUEL INJECTOR.
a. Move the injector inlet plenum aft enough to allow the injector with gasket to be installed. Install
attachment nuts, torque (Refer to Lycoming Torque Specs) and secure with pal-locknuts.
b. Install and secure the hose between the injector and turbocharger.
c. Connect the hoses and links that were disconnected from the turbocharger.
d. Connect the fuel inlet, flow, pressure and discharger lines to the injector.
e. Connect the throttle and mixture control cables to the injector. Rig controls per paragraph 8-64.
f- Replace cowling per paragraph 8-8.
g. Adjust idle speed and mixture per paragraph 8-65.
Reissued: 9/23/80
POWER PLANT
2110