Piper PA-24 Comanche Service Manual page 375

•
PIPER COMANCHE SERVICE MANUAL
•
1 CONTACT SPRING
2
RETAINING SPRING
3
DISTRIBUTOR BLOCK
4
BREAKER COMPARTMENT
S
LEAD WIRE
6
CAPACITOR
7
BREAKER ASSEMBLY
8
BREAKER CAM
9. IMPULSE
COUPLING
10 FLYWEIGHTS
Figure 7A·14. Magneto Inspection
11. RIVETS
12. lEAD QFlCUlT
13.
CONTACT SPRING
1.
INSULATOR
15
VENT PLUG
•
6. Inspect capacitor visually. If pOSlible. test for Ink• • capacity and series resistance. Remember,
an electrical failure of an airaaft capacitor is
rare.
7. Adjustment of breaken must be correct for proper internal timinl of magneto. (Refer to
pU'Faph iA·71.)
8. Check if breaker am
is
clean
and
smooth. if am screw is acht CZ5 in.
lbs). If nC'W points
are
installed. blot
a
little oil on
cam.
9. Inspect impulse couplin,
(-n
mllfteto) flywqhts for excessive looseness on the axles. Design
couplinrs
havinJ
.927 inch thick body should be checked with
1/8
inch drill. Couplings with .974 inch
thicle. body are checked with a No. 18 Crill. If drill fiu betWeen cam and flywei&ht. the fit is too loose and
coupline should be replaced. (Refer to Fipre 7 A-16.)
10. Check impulse couplinC for excess wear on the contact ed,es of body and flyweilha.
11. Check that the impulse coupliq flYWeilbt axie
rivetS
are tifht and there are no cracks
in
body.
12. Check lad. conduits for &ayed or broken
areas
of braid due to exc:essive
wear
and replace where
deemed necessary.
13. Check the sprinp for breaks. corrosion. or defonnation. If possible. check continuity from block
with tester or litht.
14.
Check insulato" for cracks, breaks or deterioration due to ace. Ascertain insulators are clean.
15. Timine and ventilator plup. Ventilator has drilled holes and should be in lowest hole in magneto
to serve also as dwn for excess water or oil. Solid plug is used in other hole - or in location exposed to rain
or water.
REVISED: 4/10/81
2D19
POWER PLANT