Piper COMANCHE PA-24-180 Service Manual page 318

12
3
1 CONTACT SPRING
6 CAPACITOR
11 RIVETS
2 RETAINING SPRING
7 BREAKER ASSEMBLY
12 LEAD CIRCUIT
3 DISTRIBUTOR BLOCK
8 BREAKER CAM
13 CONTACT SPRING
4 BREAKER COMPARTMENT
9 IMPULSE COUPLING
14 INSULATOR
5 LEAD WIRE
10 FLYWEIGHTS
15 VENT PLUG
FIGURE 7-8. MAGNETO INSPECTION
i
Inspect impulse coupling (21 magneto) flyweights for excessive looseness of the axles Design
couplings having 927 inch thick body should be checked with 1 8 inch drill Couplings with 974 inch
thick body are checked with a No 18 drill If drill fits between cam and flyweight the fit is too loose and
coupling should be replaced (Reler to Figure 7-10.)
J
Check impulse coupling for excess wear on the contact edges of body and flyweights
k
Check that the impulse coupling flyweight axle rivets are tight and there are no cracks in body.
1.
Check lead conduits for frayed or broken areas of braid due to excessive wear and replace where
deemed necessary
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 serxe also as drain for excess water or oil. Solid plug is used in other hole - or in location exposed to rain
or water
NOTE
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 followed
REVISED: 4/10/81
2B8
POWER PLANT
2B8
PIPER COMANCHE SERVICE MANUAL
IC