er
Assembly
from
magneto.
Using
a
timing light, adjust contact points to
just
open. This
adjustment
shall
be
made by rotating
cam, in opposite
di-
rection
of rotation until contacts
just
open.
While
holding
cam in
this
exact
position, push cam on
magnet shaft as
far as possible
with
the fingers.
Ex-
treme care
must be exercised
in this
operation.
If cam
adjustment is chang-
ed
in the slightest
degree,
the
timing
of
the magneto
will be thrown
off.
Do not
drive
cam on shaft with
a mallet or other
instrument.
Tightenthe
securing
screw
thereby
drawing
the
cam down,
evenly
and tightly.
Torque screw to
16-20 inch
pounds. Loosen the 11-8465 Rotor
Holding
Tool adjusting
knob and return
Figure 7A-11.
Aligning Timing
Marks
rotating
magnet to
neutral position.
Re -
install the 11-8149
Pointer Assembly
over 0° mark
on timing plate.
Rotate mag-
net shaft in
normal direction
of rotation and
check for opening
of main contact
points at
E gap setting
(15
°
+ 2°).
c. If
the distributor
block was not
removed from the
housing, the
internal
timing may
be checked by
turning the magneto
in the normal
rotation to number
one firing position (keyway up
and points just opening). At this position,
the ref-
erence line on the distributor block should line up between the L and LB marks
on the gear. On
single contact magnetos the line
should favor the L mark, if
possible.
d.
If the distributor block was removed
from the housing, the distributor
gear
alignment and
internal check
may be accomplished
as follows:
1. Turn rotating magnet
in direction of rotation until
it is located in firing
position
(keyway up and points just opening).
Tighten adjusting knob of
11-8465
Rotor Holding Tool. Apply a light coating of Bendix Grease P/N 10-27165 to teeth
of distributor gear, if needed. The large distributor gear incorporates four tim-
ing marks, L and LB for left hand rotation and R and RB for right hand rotation.
2. With distributor gear assembled to block, turn gear until raised rib on
block lines up between the L and LB marks. Assemble block and gear into hous-
ing, meshing the distributor gears together. The rib should favor the L mark,
if possible. (Refer to Figure 7A-11.)
3. Secure distributor block to housing with studs and washers. Tighten
studs finger
tight. Loosen the 11-8465 Rotor
Holding Tool and turn rotating mag-
net in reverse direction of rotation until timing light indicates contact assembly
POWER PLANT
Issued: 8/17/72
PIPER CHEROKEE
SIX SERVICE
MANUAL
2H2
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