Piper Cherokee Six - Page 405

Hub,
Model
Blade,
Model
Diameter
Blade Angle
Propeller RPM
Setting
Propeller
Torque
Limits
PIPER
CHEROKEE SIX
SERVICE MANUAL
TABLE VIIA-I. PROPELLER
SPECIFICATIONS
HC-C2YK-1 ( )or HC-C2YK-1 ( ) F
8475D-4.
F8475D-4. 8475R-0
or F8475-0
80 in.
Low
Pitch (High
RPM)
13.5° +
0.2°
High
Pitch (Low
RPM)
34.0
°
1.0° (1)
Engine Static High
RPM
2700 RPM max.
Description
Required
Torque
(Dry)
Propeller
Mounting Nuts
60-70 foot-pounds
(2)
Fwd. Bulkhead Attachment
Bolts 30-35
inch-pounds
Spinner Attachment
Screws
20-25
inch-pounds
(1)
MEASUREMENT
TAKEN
AT
30 INCH
RADIUS
(2)
FIXED
PITCH AND
CONSTANT
SPEED
d. Observe
the
starter ring
gear
to make
sure it
is mounted
properly
on the
engine
crankshaft
flange.
One of the
bushings on
the crankshaft
is stamped
with an "O"
mark and
it must
be inserted
in
the starter
ring gear
hole.
likewise
identified
with an
"O" mark.
e. Wipe
crankshaft
and propeller
pilot to
assure that
no chips or
foreign matter
enter
the propeller
mechanism.
f. Check interior
of propeller
hub for proper seating
of "O" ring. Wipe
inside of hub
to
remove
any traces
of dirt. Check
to see
that "O" ring
is covered
with grease.
g. Install rear spinner bulkhead.
h. Slide propeller
carefully over
pilot, taking care
that "O" ring is
not damaged.
i. Install
the six
hexagon head
propeller
hub mounting
bolts and
torque per
Table
VIIA-I.
j.
Check propeller
blade
track as given
in Paragraph
7-9.
k.
Safety the
propeller
mounting
bolts with
MS20995-C41
safety
wire.
1.
Install the
forward
spinner
bulkhead
and torque
bolts
per Table
VIIA-I.
Safety bolts
with MS20995-C41
safety wire.
m. Install
spinner and spinner cuff. Torque all
attachment screws per Table VIIA-I.
7A-7. BLADE
TRACK.
Blade track
is the ability
of one blade
tip to follow
the other.
while
rotating.
in almost
the same plane.
Excessive
difference
in blade track
- more than
.0625 inch -
may be
an indication
of bent blades
or improper
propeller
installation.
Check blade
track
as follows:
a. With the
engine shut down
and blades vertical.
secure to the aircraft
a smooth board
just under
the tip
of the lower
blade. Move
the tip
fore and aft
through its
full
Revised:
11/4/83
POWER
PLANT
2G9