Fuel Selector Valve (Scott) Diagram; Assembly Of Selector Valve (Scott) - Piper Navajo Chieftain PA-31-350 Service Manual

1. PACKING, PREFORMED
2. BODY, VALVE
3. ROLL PIN
4. SHAFT
5. LEVER, SELECTOR
6. COVER
7. SPRING, DETENT
8. SPACER
9. CAP ASSEMBLY
10. PLATE
11. FITTING
12. SPOOL, VALVE
13. SCREW, FLATHEAD
14. SCREW, SLOTTED
15. WASHER, LOCK
16. PACKING, PREFORMED
17. PACKING, PREFORMED
18. PACKING, PREFORMED
19. SEAL TEFLON
20. ROLL PIN
21. GEAR
NAVAJO CHIEFTAIN SERVICE MANUAL
1113
A
Figure 9-6. Fuel Selector Valve (Scott)
2. Check that the teeth of the gear and spool are not damaged.
3. Check that the threaded surfaces are not stripped or cross-threaded.
4. Check that the selector detent mechanism is operating properly.
c. Repair to the valve is limited to reconditioning of parts, such as smoothing out minor nicks and
scratches, and the replacing of O-ring packings and seal.
NOTE
Fittings (11) in valve are special. Do not use AN fittings.
9-19. ASSEMBLY OF SELECTOR VALVE. (SCOTT) (Refer to Figure 9-6.)
a. If either fitting (1 1) was removed, install the O-ring packing (17) and assemble the fitting on the
valve body (2).
b. Lubricate the O-ring packings (17) with a thin coat of stop-lock grease and install on the valve
spool (12).
c. Insert and center the spool in the valve body.
d. Lubricate the seal (19) and O-ring (16), and install in the cap assembly (9).
e. Ascertain that the shaft (4) is in place and install cover (6). Secure with screws (13).
f. Slide the spacer (8) and gear (21) on the shaft, with the pin holes aligned so that the gear teeth
are opposite the selector lever (5). Secure the gear with roll pin (3).
g. Install the O-ring packing (18) on the cap assembly.
h. Place the selector handle in neutral in relation to the cap and install the cap assembly in the valve
body. Secure the cap assembly with screws (14) and washers (15).
i. Check valve operation.
Reissued: 9/23/80 FUEL SYSTEM
2K16