INSPECTION AND REPAIR OF PUMP.
1. Disassemble the pump.
2. The filter usually comes off with the cover; it may stick inside the fuel pump. Carefully remove the filter
and replace it, if distorted.
3. Check cover gasket and replace if deteriorated.
4. Check the O-ring seal and plunger spring and replace if worn.
ASSEMBLY OF PUMP. (Refer to Figure 21-15.)
1. Insert the plunger into the tube with the buffer spring end first. Check fit by slowly raising and lowering
the plunger in the tube. It should move fully without any tendency to stick. If a click cannot be heard, the
interrupter assembly is not functioning properly in which case the pump should be replaced.
2. Install the plunger spring, cup valve, O-ring seal and washer.
3. Compress spring and assembly retainer with ends of retainer in side holes of tube.
4. Place the cover gasket and magnet in the bottom cover and assemble the filter and cover assembly.
5. Twist the cover by hand to hold in position on pump housing. Using a 5/8 inch wrench, securely tighten
the bottom cover with the bayonet fittings on the pump body and install safety wire.
INSTALLATION OF HEATER FUEL PUMP.
1. Position the fuel pump on the forward bulkhead assembly and secure in place with bolts.
2. Connect the regulator to the pump outlet and the fuel line to the pump inlet.
3. Connect the electrical lead from the pump.
4. Operate the heater to make sure the unit is functioning properly.
5. Replace nose cone and secure.
DUCT SWITCH. (Refer to Figure 21-19.)
1. Removal:
A.
Disconnect the electrical leads from the terminals on the exposed face of the switch and mark to
facilitate installation.
B.
Remove the two attaching screws and washers from the duct switch bracket.
C.
Carefully lift out the switch and gasket (if gasket is used).
2. Cleaning and Inspection:
A.
Brush off any dust or lint from the switch operating mechanism (exposed inside the duct) and wipe
the external surfaces with a clean cloth.
3. Installation:
A.
Insert the switch carefully with gasket (if used) into the ventilating duct opening and secure with
the two attaching screws and washers.
B.
Connect the two electrical leads to their respective terminals on the face of the switch as marked
during removal.
C.
Operate the heater with the duct switch set above ambient temperature to check operation.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 4 3 - 3 3
Page 21-31
Revised: May 15, 1989
1F22
PIPER AIRCRAFT
Summary of Contents for SEMINOLE PA-44-180
Page 38: ...CHAPTER DIMENSIONS AND AREAS 1B14...
Page 49: ...CHAPTER LIFTING AND SHORING 1C1...
Page 53: ...CHAPTER LEVELING AND WEIGHING 1C5...
Page 58: ...CHAPTER TOWING AND TAXIING 1C10...
Page 62: ...CHAPTER PARKING AND MOORING 1C14...
Page 65: ...CHAPTER REQUIRED PLACARDS 1C17...
Page 70: ...CHAPTER SERVICING 1C22...
Page 98: ...CHAPTER STANDARD PRACTICES AIRFRAME 1E2...
Page 108: ...CHAPTER ENVIRONMENTAL SYSTEM 1E12...
Page 189: ...CHAPTER AUTOFLIGHT 1H21...
Page 192: ...CHAPTER COMMUNICATIONS 1H24...
Page 202: ...CHAPTER ELECTRICAL POWER 1I10...
Page 228: ...CHAPTER EQUIPMENT FURNISHINGS 1J12...
Page 233: ...CHAPTER FIRE PROTECTION 1J17...
Page 238: ...CHAPTER FLIGHT CONTROLS 1J24...
Page 304: ...2A18 CHAPTER FUEL...
Page 325: ...2B17 CHAPTER HYDRAULIC POWER...
Page 357: ...2D1 CHAPTER ICE AND RAIN PROTECTION...
Page 414: ...CHAPTER LANDING GEAR 2F13...
Page 479: ...2I6 CHAPTER LIGHTS...
Page 488: ...2I16 CHAPTER NAVIGATION AND PITOT STATIC...
Page 503: ...2J7 CHAPTER OXYGEN...
Page 524: ...2K6 CHAPTER VACUUM...
Page 535: ...2K19 CHAPTER ELECTRICAL ELECTRONIC PANELS AND MULTIPURPOSE PARTS...
Page 546: ...INTENTIONALLY LEFT BLANK PA 44 180 180T AIRPLANE MAINTENANCE MANUAL 2L6 PIPER AIRCRAFT...
Page 547: ...2L7 CHAPTER STRUCTURES...
Page 582: ...CHAPTER DOORS 3A18...
Page 593: ...CHAPTER STABILIZERS 3B8...
Page 604: ...CHAPTER WINDOWS 3B22...
Page 611: ...CHAPTER WINGS 3C10...
Page 624: ...CHAPTER PROPELLER 3D1...
Page 643: ...CHAPTER POWER PLANT 3D21...
Page 667: ...CHAPTER ENGINE FUEL SYSTEM 3F1...
Page 681: ...CHAPTER IGNITION 3F16...
Page 712: ...CHAPTER ENGINE INDICATING 3H1...
Page 730: ...CHAPTER EXHAUST 3H19...
Page 734: ...CHAPTER OIL 3I1...
Page 743: ...CHAPTER STARTING 3I11...
Page 755: ...CHAPTER TURBINES 3J1...