Piper Comanche PA-24 Service Manual page 600

PIPER COMANCHE SERVICE MANUAL
7C·57. Jlalo¥III Of S -
a. DiscolllleCt the
clamps that
oecure the wires to the
.,.me
&ad
&cceslDria.
b.
LDOKD
the coup!int aua at the
spuk plup aDd _ the iasWaron from the sparl< plUI barrel
welL
Ule cautioa "beD widlcinwinl the iDJDI&tor DOt to
damose
the iasWaror SPriDl.
c. Place.
pard ~
the IwDesI iDlWaror.
d. Remove the IwDesI aucmbly tcnniDaI platc from the 1IIII"ftO.
e. Remove the ...... baffle platc that receifts the bamea aaembly.
f. Remove the harDca from the airplane.
7C·'8.
1 . . .
I"do. Of
a.....
Before iamlliDi bamea
aD .......
ftO.
c:heck matiag surfaces
for cIroali",."
Spray entire face of gromlllC't with • 1iBbt COat of Plutie Mo1cl
Spray.
SM~~·TH
Silicoae Spray or
equivoleat. This will preveat bam ... grommet from
stic:kial
to IIIII"ftO dilaibutor b1oc:k.
a. Place the barn ... tcrmiJIai plate oa the ....... etO &ad
tighteD
aua around the plate alternately to
.... caver squarely "a
1DIfDOtD.
Torque screws to 18 to
ZZ
inch pouads.
b. Route ipition wira to their respective cy'
len.
e.
Clamp the bam ... auembly in position &ad replace the engille baffle plate.
d.
CODDect rbe leads to the sparl< plup.
7C·'9.
Span.
Pi .....
7C-OO. Removol Of Spork
PIlIp.
a. Loosen the cOllpq alit oa the bam ... lead and remove the terminal insulator from the sparl< plug
barrel
well.
NOTE
When withcinwing the ignition cable lead connection from the plug.
cate
must be talc.en to pu.l.l the lead straicht out and in line with the
center line of the plug barrel; otherwioe. a side load will be applied
w,ich frequendy resI1Ia in
damace
to the barTel insIlI&cor &ad
conneceor. If tbe lead canaot be removed easily in tIIis manner. the
resistiaJ coatact betw .. n the neoprene coUu and the barrel insIlI&tor
will
be broken by a rotary twisting of the coUu. Avoid IlDdue distortion
of the coUar and poaible side loading of the bartel insulator.
b. Remove the spark plug from the engine. In the coune of engine operation. carbon and other
combustion prodllca will be deposited on the eDd of the spark plllg and will penetrate the lower threads to
some degree. A •• result. greater torque is freqllendy required for retnoving a plug than for iu in.uIIanon.
Accordingly. the torque limitations given do not apply to plug retnovol and ",fficent torque mll$t be .... d
to unscrew the plug. The higher torque in removal
is
not as detrimental as ir. insLillation, since it cannot
stretch the threaded section. It don. however. impose a.
sheanng load on this section and ma.y. If
sufficiently severe, produce a. failure
IJl
this location.
POWER PLANT
ISSUED: 8118n2
2
H18