Piper Comanche PA-24 Service Manual page 434

1 CONTACT SPRING
2 RETAINING SPRING
3 DISTRIBUTOR BLOCK
• BREAKER COMPARTMENT
5 LEAD WIRE
PIPER COMANCHE SERVICE MANUAL
6
CAPACITOR
7 BREAKER ASSEMBLY
8 BREAKER CAM
9 IMPULSE COUPLING
10 FLYWEIGH1S
FIGl·RE 7·8. MAGNETO INSPECTION
11
RIVETS
12 LEAD CIRCUIT
13 CONTACT SPRING
14 INSULATOR
15 VENT PLUG
9
•
I
Inspect impulse coupling (21 magneto) Ovweights for excessi\·e 100sene'S of the axles Design
couplings having 927 inch thick bod\ should be checked with I 8 inch drill Couplings with 974 inch
thick bod, are checked "ith a:'\o 18 drill If drill fits between cam and flyweight the fit is too loose and
coupling should be replaced (Refer to Figure 7·10.)
J
Check impulse coupling for excess wear on the contact edges of body and Oyweights
k Check that the impulse coupling Oyweight axle rivets are tight and there are no cracks in bod\".
I.
Check lead conduits for frayed or broken areas of braid due to excessive wear and replace where
deemed necessarv
m. Check the springs for breaks. corrosion. or deformation. If possible. check continuity from block
with tester or light
n Check insulators for cracks. breaks or deterioration due to age. Ascertain insulators are clean
o Timing and ventilator plugs Ventilator has drilled holes and should be in lowest hole in magneto
to serve also as drain for excess water or oil. Solid plug is used in other hole· or in location exposed to rain
or water
REVISED: 4/10/81
"'OTE
The magneto service instructions in this manual are to cover minor
repairs and timing For further repairs and adjustments of the
magnetos. it is recommended that the manufacturer's service
instructions be follo"ed
2B8
•
POWER PLANT