Piper Comanche PA-24 Service Manual page 500

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FIGURE 7A-19_ TIMING PLATE INSTALLED
ON BREAKER COMPARTMENT
PIPER COMANCHE SERVICE MANUAL
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"UIUI
FIGURE 7A-za. BREAKER COMPARTMENT WITH
CAST TIMING MARKS
b. Find nlNtni position of the m .... cto drive by rowinl cIriYe couplinl in a left lland dirccnon unc.!
the red or white chamfered tooth on the disaibutor drive gear appears
through the timing inspection hole.
At the same location, the dri .. should feci to bave fall ...
ineo
a notch
or
neutral position.
c. Hold the mqneto dri ..
111
the neutral position and bend the
cimini
poinm until it indicates
O·
on
the timing plate or in the breakct compartment. _
d. Rotate the drive coupling ftom neutnl in a left hand direction 10·. Appear through the tuning _
hole and iIign the chamfered tooth of the distributor gear with the white line of the dismbutor block.
Ascertain that the maIn breaker poiDa open at this POUlE md the pOinter' indica.tes 10
0
on the place or "E"
gap in the breaker compartment.
e, Without moving the dnvc coupling from the "E" gap or 10· after.neutnl position, bend the points
ba.ck to the 0
0
mark.
f. Using Data Table VilA-II dctcnnine the degree rcurd of the mqnctO being checked. Normally the
correct retard setting will be lUmped in bottom of breaker companmenr for convenience.
g. Tum the drive coupling in the left hand direction unril the poinrer reaches the required number of
degeccs rewd, The retard breaker points should open at thIS point.
h.
Rotate dri\'c coupler until cam foUower is on the high point of the cam lobe .. \teasu~
canuct
clearance. It must be 0.018 : 0.006 or the points m ..... be replaced.
CAUTION
If C2l11 screw wa.s removed. be sure to reinstall and torque to 25 Inch
pounds.
POWER PLANT
ISSUED: 8118n2
2
D22