Piper Navajo PA-31 Service Manual page 492

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1.RETAINER
2. SPRING
3
3. CAP
4. O" RING
5. "O" RING
6. NOZZLE
4
Figure 8-9.
Fuel-Air Bleed-Nozzle
8-47. FUEL AIR BLEED NOZZLE.
8-48. REMOVAL OF FUEL-AIR BLEED NOZZLE. The nozzles must be carefully
removed as they or the cylinders may be damaged.
a. Clean the nozzle with acetone or equivalent and blow out all foreign particles. Do not
use wire or other hard objects to clean orifices. (Refer to the latest revision of Lycoming Ser-
vice Instruction No. 1275.)
b. Inspect and replace nozzle "O" rings if found to be cracked, brittle or distorted.
c. A test procedure for air bleed nozzles is described in the latest revision of Lycoming
Service Instruction No. 1275.
8-49. CLEANING AND INSPECTION OF FUEL-AIR BLEED NOZZLE.
a. Clean the nozzle with acetone or equivalent and blow out all foreign particles. Do
not use wire or other hard objects to clean orifices. (Refer to Lycoming Service Instruction
No. 1275.)
b. Inspect and replace nozzle "O" rings if found to be cracked, brittle or distorted.
c. A test procedure for air bleed nozzles is described on Lycoming Service Instruction
No. 1275.
8-50. INSTALLATION OF FUEL-AIR BLEED NOZZLE.
a. It is important for the nozzles to be correctly positioned with the bleed hole
upward.
b. Install the nozzles and torque to 60 inch-pounds.
c. Ascertain that the "O" rings are properly installed on the nozzle stem and install the
nozzle shroud. (Refer to Figure 8-9.)
Revised: 9/24/81
POWER PLANT
PIPER NAVAJO SERVICE MANUAL
2118