Fuel Injector Maintenance; Fuel Injector - Piper ARROW III Service Manual

CHEROKEE ARROW III SERVICE MANUAL
Never wash the filter element in any liquid or soak it in oil. Never attempt to
blow off dirt with compressed air.
c. The filter housing can be cleaned by wiping with a clean cloth soaked in a suitable dry type solvent.
When the housing is dry, reinstall and seal the filter element.
8A-18. ALTERNATE AIR DOOR. The alternate air door is located in the induction bracket mounted on the
fuel injector. The door provides a source of air to the engine should there be an air stoppage through the filter
system. The following should be checked during inspection:
a. Check that air door seals are tight and hinge is secure.
b. Ascertain that the spring tension of the door is tight enough to allow the door to remain closed at full
engine RPM, yet should there be an air stoppage, it will be drawn open.
c. Actuate the door by pushing in on it with the fingers to determine that it is not sticking or binding.
d. Check the cockpit control cable for free travel.
e. Check that when the control lever in the cockpit is in the open position, the cable is adjusted to allow
approximately .0625 to .125 of an inch between the actuating arm roller and the door when fully
closed.
8A-19. FUEL INJECTOR.
8A-20. FUEL INJECTOR MAINTENANCE.
a. In general, little attention is required between injector overhauls. However, it is recommended that the
following items be checked during periodic inspection of the engine.
1. Check tightness and lock of all nuts and screws which fasten the injector to the engine, torquing all
nuts to 135-150 inch-pounds.
2. Seat the pal type locknuts and finger tighten them against the plain nuts. After this has been done
tighten the locknuts an additional 1/3 to 1/2 turn.
Revised: 11/21/80
Figure 8A-5. Fuel Injector
CAUTION
2D8
POWER PLANT - LYCOMING