Scott Fuel Selector Valve; Cleaning, Inspection And Repair Of Selector Valve (Scott); Assembly Of Selector Valve - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
1113 3 8 13 145
1.
PACKING, PERFORMED
2 10 1 17
A
2. BODY, VALVE
B
3.
ROLL PIN
5.
LEVER, SELECTOR
6. COVER
7 SPRING, DETENT
8.
SPACER
9.
CAP ASSEMBLY
10. PLATE
SERIAL
NOS 31
TO 31-7300951
INCLUSIVFITTING
12. S POOL, VALVE
13. SCREW, FLAT HEAD
14. SCREW, SLOTTED
15.
WASHER. LOCK
.
6. PACKING, PERFORMED
17 PACKING, PERFORMED
8.
PACKING, PERFORMED
4 21 16-19
20.
ROLL PIN
SECTON
A-A
21.
GEAR
SERIAL NOS. 31-
TO 31-7300951 INCLUSIVE
Figure 9-6. Scott Fuel Selector Valve
9-18. CLEANING, INSPECTION AND REPAIR OF SELECTOR VALVE (Scott).
a. Clean the valve components in a dry cleaning solvent.
b. Inspect the valve for the following:
1. Check that the friction surfaces of the valve are free from nicks, dents and burrs.
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 (11) was removed, install the "0" ring packing (17) and assemble the
fitting on the valve body (2).
b. Lubricate the "0" 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 "0" ring (16), and install in the cap assembly (9).
Reissued: 10/12/79
FUEL SYSTEM
3B12