Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 238

PIPER CHEROKEE WARRIOR SERVICE MANUAL
8-2a. STANDARD PRACTICES - ENGINE.
The following suggestions should be applied wherever they are needed when working on the power plant.
a. To insure proper reinstallation and or assembly, tag and mark all parts, clips, and brackets as to
their location prior to their removal and or disassembly.
b. During removal of various tubes or engine parts, inspect them for indications of scoring, burning,
or other undesirable conditions. To facilitate reinstallation, observe the location of each part during removal.
Tag any unserviceable part and or units for investigation and possible repair.
c. Extreme care must be taken to prevent foreign matter from entering the engine, such as lockwire,
washers, nuts, dirt, dust, etc. This precaution applies whenever work is done on the engine, either on or off the
aircraft. Suitable protective caps, plugs, and covers must be used to protect all openings as they are exposed.
Dust caps used to protect open lines must always be installed
OVER the tube ends and NOT IN the tube ends. Flow
through the lines may be blocked off if lines are inadvertently
installed with dust caps in the tube ends.
d. Should any items be dropped into the engine. The assembly process must stop and the item
removed, even though this may require considerable time and labor. Insure that all parts are thoroughly clean
before assembling.
e. Never reuse any lockwire, lock washers, tab locks, tab washers, or cotter pins. All lockwire and
cotter pins must fit snugly in holes drilled in studs and bolts for locking purposes. Cotter pins should be
installed so the head fits into the castellation of the nut, and unless otherwise specified, bend one end of the pin
back over the stud or bolt and the other end down flat against the nut. Use only corrosion resistant steel lock-
wire and or cotter pins. Bushing plugs shall be lockwired to the assembly base or case. Do not lockwire the
plug to the bushing.
f. All gaskets, packings and rubber parts must be replaced with new items of the same type at
reassembly. Insure the new nonmetallic parts being installed show no sign of having deteriorated in storage.
g . Use only a plastic or rawhide hammer when installing engine parts which require the use of a
h a mmer to facilitate assembly or installation. .
h. A n t i-seize lubrication should be applied to all loose-fit spline drives which are external to the
engine and have no other means of lubrication. For certain assembly procedures, molybdenum disulfide in
either paste or pondered form mixed with engine oil or grease may be used.
Ensure that Anti-seize compounds are applied in thin even
coats, and that excess compound is completely removed to
avoid contamination of adjacent parts.
i. Temporary marking methods are those markings which will ensure identification during ordinary
handling, storage and final assembly of parts.
8-3. TROUBLESHOOTING.
Troubles peculiar to the power plant are listed in Table VIII-II, at the end of this section, along with
their probable cause and suggested remedies. When troubleshooting the engine, ground the magneto primary
circuit before performing any checks on the engine.
Revised: November 30, 1982
NOTE
CAUTION
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Island Enterprises
POWER PLANT