Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 141 / 881

Figure 21-15. Heater Fuel Pump
DISASSEMBLY OF PUMP. (Refer to Figure 21-1S.)
1. Remove the safety wire that secures the bottom cover to the pump.
2. Using a 5/8 inch wrench, release the bottom cover from the bayonet fittings. Twist the cover by hand to
remove it from the pump body.
3. Remove the filter, magnet and cover gasket.
4. Remove the retainer spring from the plunger tube using thin nose pliers to spread and remove ends of
retainer from tube.
5. Remove washers, O-ring seal cup valve, plunger spring and plunger from the tube.
CLEANING OF PUMP.
1. Wash all pans in cleaning solvent and blow out with air pressure.
2. If plunger does not wash clean or if there are any rough spots, gently clean the surface with crocus cloth.
3. Slosh the pump assembly in cleaning solvent and blow out with air pressure.
4. Swab the inside of the tube with a cloth wrapped around a stick.
TOP
1. PUMP, BODY 7. O-RING
2. TUBE, PLUNGER 8. WASHER
3. FILTER 9. RETAINER
4. PLUNGER 10. MAGNET
5. SPRING 11. GASKET, COVER
6. CUP VALVE 12. COVER
BOTTOM
2
1
A932
3 4 5 6 7 8 9 10 11 12
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 4 3 - 2 9
Page 21-30
Revised: May 15, 1989
1F21
PIPER AIRCRAFT