Piper Cherokee Six Service Manual page 451

k. With all high tension terminal grommets seated against the ferrules in the cover,
attach the bottom capacitor lead to the right main breaker and then the top capacitor lead
to the left main breaker. Position the cover on the magneto and secure. Torque cover screws
to 30-35 inch-pounds.
1. Carefully route the high tension spark plug leads away from any hot spots such as
manifolds and sharp edges which might cause heat damage or chafing. Check leads for
proper location in clamps so when clamps are tightened the leads will not be crushed. Leads
should be taut to prevent chafing due to vibration, but not so taut as to produce undue
strain or leads.
m. After all leads have been properly routed and secured to the engine, recheck all
clamp securing screws for tightness. Fasten coupling nuts to proper spark plugs and torque
as specified in Table VIIA-II. Do not allow ferrules to turn while torquing nuts.
TABLE VIIA-II. COUPLING TORQUES
Spark Plug
Torque
Coupling Threads
(lb.-in.)
5/8-24
90-95
3/4-20
110-120
7A-47. SPARK PLUGS.
7A-48. REMOVAL OF SPARK PLUGS.
a. Loosen the coupling nut on the harness lead and remove the terminal insulator from
the spark plug barrel well.
NOTE
When withdrawing the ignition cable lead connection from
the plug, care must be taken to pull the lead straight out and
in line with the centerline of the plug barrel; otherwise a side
load will be applied, which frequently results in damage to
the barrel insulator and connector. If the lead cannot be
removed easily in this manner, the resisting contact between
the neoprene collar and the barrel insulator will be broken by
a rotary twisting of the collar. Avoid undue distortion of the
collar and possible side loading of the barrel insulator.
b. Remove the spark plug from the engine. In the course of engine operation, carbon
and other combustion products will be deposited on the end of the spark plug and will
penetrate the lower threads to some degree. As a result, greater torque is frequently required
for removing a plug than for its installation. Accordingly, the torque limitations given do
POWER PLANT
Added: 7/28/75
PIPER CHEROKEE SIX SERVICE MANUAL
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