Piper PA-24 Comanche Service Manual page 467

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PIPER COMANCHE SERVICE MANUAL
RET....O TERMIN"'L
FIGURE 7C·12. ALIGNING TIMING MARKS
SINGLE CONTACT ASSEMBLY MAGNETO
FIGURE 7C·13. FORMING LEADS IN
BREAKER COMPARTMENT
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3. Secure distributor block to housiq with studs Uld washen. TiJhteD studs tinter titht. Loosen
the 1HI465 Rocor HoldiDl Tool and tum rotatinc
mqDft
in revcnc direction of rotation Wltil timine light
indicatcs main contaCt UICIIlbly
has
just opened lAd check to make cettain
rimiDJ
marits &li(n within
tolerance indicated
~ve.
Tilhten block
sccuriDI
scuds.
fltSC
to ...
inch pOWlds torque and then final
torque to 20 inch pounds.
~.
Inscrc the tip of yOUl small fqer
throu,h
timinI
hole in housm. and apinst Iarp distributor
,car teech. Rock distribucor par back and forth sliIhtly. There must
be perceptible backlash between teeth
of 1 . and small
san.
This check should be made at three different points. 120
0
apart on
gear.
If
ba.ck1uh
is
not evident. replace Iarp distributor
sur.
,. Install the breaker cover and completc reassembly of the magneto. Refer to manufacrurer's
publications for completc disulcmbly &ad rcaaembly procedurcs.
f.
lnscall and time mapeto. removed from enpne. ill accordance with paracraph 7C·B.
J. Secure extema1 switch and retard leads
to
the breaker cover termiDals. Connect harncss assembly
to the
mllDno.
7C·S3, last.aUadoa And
Timial
l'roadun.
(TiaIiq
MapeuJ
to
Eope.)
a. Remove a
spark
piua
from No.1 cylindcr and tum cranksh&ft in direction of normal rotation until
the compression strOke is resched.
NOTE
The advance
cimina
mark on the tOP face of the starter ring ,ear is
marked at both 2rf
and 25" BTC. t.."sc only the 2,0 BTC marie. when
tuning the rnqncros to the enginc.
POWER PLANT
ISSUED: 8/18/12
2
H15