LANCE
II SERVICE
MANUAL
TABLE
VIII-I.
PROPELLER
SPECIFICATIONS
Hub,
Model
HC-C2YK-1BF
Blade, Model
F8475D-4
Diameter
80 in.
Blade
Angle
Low Pitch (High
RPM)
13.5
± 0.2
°
()
High Pitch (Low
RPM)
34.0
°
1.0
°
(1)
Propeller
RPM
Engine
Static
High RPM
2700
RPM max.
Setting
Propeller
Torque
Description
Required
Torque
Limits
(Dry)
Propeller Mounting
Nuts
60-70 foot-pounds
Fwd. Bulkhead
Attachment
Bolts
30-35
inch-pounds
Spinner
Attachment
Screws
20-25
inch-pounds
(1) MEASUREMENT
TAKEN AT 30
INCH RADIUS
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 "0" mark and
it must
be inserted in the starter ring gear
hole, likewise identified with an
"0" 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 "0" ring.
Wipe inside of hub to
remove
any traces of dirt. Check to
see that "O" ring is covered with
grease.
g. Install prop with blades
aligned with mounting bolt hole
marked "O".
h.
Install rear spinner
bulkhead.
i.
Slide propeller
carefully over pilot,
taking care that
"O" ring is not
damaged.
j. Install the six
hexagon head propeller
hub mounting
bolts and torque
per Table
VIII-I.
k.
Check propeller
blade track
as given
in Paragraph
8-7.
1. Safety the propeller
mounting bolts with
MS20995-C41 safety wire.
m. Grease blade
hub through
zerk fittings. Remove
one of the two
fittings for each
propeller
blade, alternate
the next time.
Apply grease through
the zerk fitting
until fresh
grease appears
at the fitting
hole of the removed
fitting. Care should
be taken to
avoid
blowing out hub gaskets.
n. Install
the
forward
spinner bulkhead
and torque
bolts per
Table
VIII-I. Safety
bolts
with
MS20995-C41
safety wire.
o. Install spinner and spinner
cuff. Torque all attachment
screws per Table VIII-I.
8-7. 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:
9/2/78
POWER PLANT
2A13
To Next Page
Loading...
Need help?
General