Piper SARATOGA PA-32-301 Maintenance Manual page 532

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
234
Figure 74-32. Removing Spark Plug Frozen to Bushing
-NOTE-
When withdrawing the ignition cable lead connectionfrom the plug,
care must be taken to pull the lead straight out and in line with the
center line 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. A void
undue distortion of the collar and possible side loading of the barrel
insulator.
2. 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 thread, to
some degree. As a reult. greater torque is frequently required for removing a plug than for its installation
Accordingly. the torque limitations given do not apply to plug removal and sufficient torque must be used to
unscrew the plug. The higher torque in removal is not as detrimental as in installation, since it cannot stretch
the threaded section. It does. however. impose a shearing load on this section and may. if sufficiently serve.
produce a failure in this location.
74-20-05
Page 74-25
Revised: August 9. 1984
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