Prime Jets; Fuel Flow Gauge Damper (Fuel Injection System) - Piper PA-24 Comanche Service Manual

PIPER COMANCHE SERVICE MANtAL
e.
To
reins~all
pump. insert the pump body through
~he
panel. install the piston assembly and s e c .
the face nut. Position the pump and secure the locknut behind the panel. Connect the supply lines.
8-~4. Prime Jets.
a. To remove the prime jets. disconnect the supply line from each jet. With a deep socket and light
pressure.
remove
the jet from the cylinder.
b. To clean the jet. soak in a carbon remover solution long enough to loosen any dirt and blow clean
\\ ith air pressure. Do not use sharp objects or wire brush to clean the jet tube.
c. Install the jet finger tight to assure that the threads are not crossed and then torque 60 to I
~5
inch-pounds. Align and install the fuel supply lines. tighten to a snug fit.
~OTE
Should further fuel stoppage of the primer system exist. check the
supply lines for stoppage. bent or collapsed walls.
~-~5.
Fuel Flow Gauge Damper (Fuel Injection System). There are two locations along the fuel flow gauge
pressure line which have a damper installed. One is between the fire wall and the gauge. while the other
i..
between the flow divider and the engine baffle. The dampers consist of stainless steel wire installed inside
the line at the two locations described above. These dampers are in the line to prevent surging of the flo"
gauge. and must not be removed except for cleaning purposes only.
8-~6.
Troubleshooting. Troubles peculiar to the Comanche fuel system are listed in Table VIII-I\'
along with their probable causes and suggested remedies. When troubleshooting. check from the
fu.A
supply to the items affected.
Jf
no trouble is found by this method. the trouble probably exists
insi~
individual pieces of equipment: they may then be removed from the aircraft and an identical unit or
units. tested and 'known to be good. installed in their place. Troubleshooting the fuel quantity indicator
may be found in Section Xl. Instruments. The electrical diagrams for each fuel system may be found in
Section IX. Electrical System.
Fl'EL 5\,51[.
2J16