PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 1
Nov 30/06
4K9
73-10-00
DISTRIBUTION
1. Engine Primer Pump (Refer to Figure 1.)
A. Removal
(1) Disconnect the fuel lines from the primer behind the instrument panel.
(2) Loosen the locknut (12) from behind the panel.
(3) Unscrew the knurled face nut (10), and withdraw the pump handle (9) and piston (7) from the
cylinder (5).
(4) Remove the remaining portion of the primer.
B. Disassembly, Cleaning, and Assembly
(1) To disassemble primer
(a) Remove the retainer screw (3) from the end of the cylinder housing.
(b) Remove ball spring (2) and check ball (1) from the end of the cylinder housing.
(2) Clean the primer parts with acetone or a dry type solvent.
(3) To assemble primer:
(a) Install new O-rings to the piston (7) and lubricate with light motor oil.
(b) Install check ball (1), ball spring (2) and screw (3) to the cylinder housing.
(c) Insert the pump handle (9) and piston (7) into the cylinder (5) end. Finger tighten the
knurled face nut (10).
(4) Immerse the pump in gasoline and operate several times to insure proper operation.
C. Installation
(1) Remove the pump handle (9) and piston (7) by unscrewing the knurled face nut (10).
(2) Insert the cylinder assembly through the back side of the panel.
(3) Insert the piston into the cylinder (5) and tighten the knurled face nut.
(4) Position the primer and tighten the locknut (12) on the cylinder behind the panel.
(5) Connect the fuel lines to the primer.
(6) Disconnect the primer line inside the engine compartment.
Engine Primer
Figure 1
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