Selector Valve Disassembly; Selector Valve Cleaning, Inspection And Repair - Piper PA-44-180 SEMINOLE Maintenance Manual

1113
3 8 6
13 18 15 14 5
4 21 16-19 9
20
SECTION
DISASSEMBLY OF SELECTOR VALVE. (Refer to Figure 28-5)
1. Remove the four screws and washers that attach the cap assembly to the valve body.
2. Pull the cap assembly straight from the valve body.
3. Push the spool from the valve body.
4. To disassemble the cap assembly, remove the roll pin that secures the gear on its shaft by driving the pin
with a 3/32 straight drift punch.
5. Remove the gear and spacer from the shaft.
6. Remove the four screws that secure the packing and seal cover. Remove the cover.
7. Remove old O-rings and seal.
8. If fitting is removed, replace O-ring packing.
CLEANING, INSPECTION AND REPAIR OF SELECTOR VALVE.
1. Clean the valve components in a dry cleaning solvent.
2. Inspect the valve for the following:
A. Check that the friction surfaces of the valve are free from nicks, dents and burrs.
B. Check that the teeth of the gear and spool are not damaged.
C. Check that the threaded surfaces are not stripped or cross-threaded.
D. Check that the selector detent mechanism is operating properly.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE 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, FLAT HEAD
14. SCREW, SLOTTED
15. WASHER, LOCK
16. PACKING, PREFORMED
17. PACKING, PREFORMED
18. PACKING, PREFORMED
19. SEAL
20. ROLL PIN
21. GEAR
Figure 28-5. Fuel Selector Valve
2B12
2 10 17
7
1
12
Revised: May 15, 1989
11
2 8 - 2 2 - 0 3
Page 28-17