Piper SARATOGA PA-32-301 Maintenance Manual page 499

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
GENERAL.
DISTRIBUTION.
FUEL. INJECTOR
The Bendix RSA type fuel injection system is based on the principle of measuring air flow and using the
air flow signal in a stem type regulator to convert the air force into a fuel force. This fuel force (fuel pressure
differential) when applied across the fuel metering section (jetting system) makes fuel flow proportional to air
flow. Fuel vaporization takes place at the intake ports.
FUEL
INJECTOR MAINTENANCE.
1.
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:
A. Check tightness and lock of all nuts and screws which fasten the injector to theengine. torquing
all nuts to 135-150 inch-pounds.
B. Seat the pal type locknuts and fingertighten them against the plain nuts. After this has been done
tighten the locknuts an additional 1 3 to 1 2 turn.
C. Check all fuel lines for tightness and evidence of leakage. A slight fuel stain adjacent to the air
bleed nozzles is not cause for concern.
D. Check throttle and mixture control rod ends and levers for tightness and lock.
E. Remove and clean the injector inlet strainer at the first 25 hours of operation and each 50 hour
inspection thereafter. Check the screen for distortion or openings in the strainer. Replace for either of these
conditions. Clean screen assembly in solvent and dry with compressed air. Damaged strainer O-rings should
be replaced. To install the screen assembly, place the gasket on the screen assembly and install the assembly in
the throttle body and tighten to 35-40 inch-pounds torque.
FUEL-AIR BLEED NOZZLE. (PA-32-301.)
REMOVAL OF FUEL-AIR BLEED NOZZLE. (PA-32-301.)
The nozzles must be carefully removed as they or the cylinders may be damaged.
1. Remove the lower engine cowl.
2. Disconnect the fuel line from the nozzle.
3. Carefully remove the nozzle, using the correct size deep socket.
4. Clean and inspect the nozzle as given in the next paragraph.
73-10-04
Page 73-01
Revised: August 9. 1984
2J16