Piper PA-28-161, Maintenance Manual

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PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 3
Nov 30/06 2K3
28-20-00
B. Installation
(1) Position fuel pump to engine mount frame and secure with bolts, washers, and nuts.
(2) Connect fuel lines to pump. Connect fuel inlet line to pump. Connect the main fuel and fuel
primer outlet lines to tee fitting.
NOTE: Before connecting fuel inlet line, ensure that the stainless steel sleeve on the inlet
tube assembly has been sprayed with MS122DF lubricant. Take care to ensure that no
lubricant is sprayed on the threads of the nut.
(3) Connect electrical leads to pump.
(4) Turn fuel shutoff on and operate fuel pump. Check all fuel line fittings for leakage.
(5) Install cowling.
C. Disassembly (Refer to Figure 2.)
Pump repair is limited to fuel reservoir area only, since the electrical system is sealed. Disassemble
fuel pump as follows:
CAUTION: DO NOT DAMAGE THE SCREEN WHEN REMOVING IT FROM THE PUMP
HOUSING.
(1) Cut safety wire and remove bottom cover, gasket, magnet, and filter screen from pump.
CAUTION: DO NOT REMOVE BUFFER SPRING AND VALVE FROM PLUNGER
ASSEMBLY.
CAUTION: DO NOT TAMPER WITH SEAL (CENTER OF MOUNTING BRACKET) AT THE
SIDE OF THE PUMP. IT RETAINS THE DRY GAS SURROUNDING THE
ELECTRICAL SYSTEM IN THE UPPER PORTION OF PUMP.
(2) Use thin nose pliers to spread and remove retainer ends from plunger tube. Remove retainer
spring from tube.
(3) Remove washer, O-ring seal, cup valve, and plunger assembly from pump.
Electric Fuel Pump
Figure 2