Piper Cherokee Six - Page 421

PIPER CHEROKEE SIX SERVICE MANUAL
Figure 7A-9.
Rotor Holding
Tool Figure
7A-10. Timing
Kit Installed
Installed
7A-29. TIMING PROCEDURE (Internal Timing).
a.
Remove the cover to the
contact(s), distributor block,
etc.
b. To internally time the contact assembly of the single-breaker magnetos,
proceed as follows:
1. Loosen the nut securing
the drive plate to the magneto
shaft sufficiently
in order to install
the Scintilla 11-8465 Rotor Holding
Tool under the nut and flat
washer as shown
in Figure 7A-9. Tighten
the nut securely.
2. Remove the timing inspection
plug from the top of the
magneto. Turn
rotating
magneto to proper neutral position.
This position is determined
by lo-
cating keyways on drive end of
magnet shaft at 12 o'clock with
respect to name
plate on housing.
Tighten adjusting knob of 11-8465
Rotor Holding Tool until
pressure is applied on
housing flange preventing magnet
from turning.
3. Loosen and rotate cam untilcam
follower of contact assembly
rests on
highest point
of cam lobe.
Adjust contact
assembly to obtain
the clearance
of
0.016 of an
inch. Tighten contact assembly
securing screws to 20 to 25 inch
pounds.
4. Install the 11-8693
Timing Plate Assembly
and the 11-8149 Pointer As-
sembly
of the 11-8150
Scintilla Timing
Kit to breaker
compartment
of magneto.
(Refer to Figure 7A-10) Alignpointerassembly
with the 0
°
mark
on timing plate.
Loosen
adjusting knob of 11-8465 Rotor
Holding Tool and turn rotating
magnet in
normal direction of rotation
until pointer indexes with the
respective E gap mark
(15
°
± 2°).
Tighten adjusting knob of 11-8465
Tool andremove the 11-8149 Point-
POWER PLANT
Issued: 8/17/72
2H1