PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 13
Nov 30/06
4J11
71-00-00
4. Engine
A. Removal (Refer to Figure 1.)
CAUTION: PLACE A TAIL STAND UNDER THE TAIL OF THE AIRPLANE BEFORE REMOVING
THE ENGINE.
(1) Turn off all electrical switches in the cockpit and then disconnect the battery ground wire at the
battery.
(2) Move the fuel selector lever in the cockpit to the OFF position.
(3) Remove the engine cowlings by releasing the cowl fasteners and the attachment screws. Be
certain that all electrical leads are disconnected prior to removal of the cowl.
(4) Remove the propeller per 61-10-00.
CAUTION: IDENTIFY (TAG) ALL HOSES, LINES AND WIRES AS THEY ARE
DISCONNECTED AND SEPARATED TO FACILITATE INSTALLATION. CAP ALL
OPEN FUEL, OIL AND VACUUM LINES AND FITTINGS TO PREVENT
CONTAMINATION.
(5) Disconnect the starter positive and ground leads at the starter and their attachment clamps.
(6) Disconnect the cabin heat and defroster tubes from the muffler.
(7) Disconnect the primer line at the tee connection.
(8) Disconnect the throttle and mixture cables at the carburetor and carburetor heat control. The
carburetor may be removed if it is desirable.
(9) Disconnect the mechanical fuel pump supply line at the pump.
(10) Disconnect the engine oil cooler lines from the cooler.
(11) Disconnect the magneto “P” leads at the magnetos. Insert a protective cover over the
connection.
(12) Disconnect the engine oil temperature lead at the aft end of the engine.
(13) Disconnect the tachometer drive cable from the rear of the engine.
(14) Untie the ignition harness, hoses and lines at the aft end of the engine.
(15) If installed, disconnect the vacuum pump lines at the pump.
(16) Disconnect the oil pressure line from the rear of the engine.
(17) Disconnect the generator or alternator leads and the cable attachment clamps.
(18) Attach a one-half ton (minimum) hoist to the hoisting straps and relieve the tension from the
mounts.
(19) Check the engine for any attachments remaining to obstruct its removal.
(20) Drain the engine oil, if desired, and close the drain.
(21) Remove the four engine mount assemblies and swing the engine free, being careful not to
damage any attaching parts.
B. Installation (Refer to Figure 1.)
NO
TE: Ensure that all hex nuts on the exhaust stack flanges are tightened until the underside of
the flange contacts its mating surface at all four locations. Then torque hex nuts to 110-115
inch pounds.
(1) Prior to installing the engine, be certain that all components of the engine such as exhaust
stacks, carburetor, etc, are installed.
(2) Attach a one-half ton (minimum) hoist to the engine hoisting straps and swing the engine into
alignment with its attaching points.
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