Piper PA-24 Comanche Service Manual page 404

PIPER COMANCHE SERVICE MANUAL
7B·IO. lua1Wioa
Of PropcUcr.
(Refer to Fipre 78·1.)
L
Position the spiJmer buJkhead (7) apiftIc
the swter
rin,
Jat
suPPOrt (8) so thar on arrow lines up
with the TCI
on the front face of the support.
b. Secure the spinner
bulkhad
to the saner
rina
gear suppon: with 12 bola.
IUlCI
aDd
24 washen.
(One under
the bolt head and one
wuler cadi nut.) CaftfuUy
tiptCD
nuts
uniformly to
torque
limits
shown
in
Table VIJ.l. .
c.
Clean
the propdIcr aDd
CDJine
flutes.
d. Observe
the starter
rinI
par
to make
JUre
it
is
mounted properly
on the
cnJiae amkshaft fIante.
The
cnakshaft
fIanp
is swnped with
III
"0" mark uad the saner riftJ
par is likewise
identified
by
an
"0"
mark.
Upon iDsuJ1ation -
of the
stamf
riJII
aar.
the mariUnp
sball
be ma:ed to insure
proper
installation.
c. Install "0"
rint
(6) and
shim
(5)
on the
eaFnc
sbat't.
CAUTION
it is absolutely
CSSCDtial
that
shim
(5)
be insta11cd
u
failure to
do
so
may
rault in f&i1urc of
the mournin,
bola
due
to reLative movement of
the
two
a&fIICS.
•
f.
Raise the propeUer
into
posicion
with
the enpc.nd slide the propeUer
onto
thc propeUer
mountinJ
bushiDp.
,. Install
the
mountiJlt bola (4) in
the
propeUer hub
and
secure propeller
to
engifte
flange.
h.
Torque
bola to
specification
liven in
Table VIlB·1
and safety. •
i. Check blade
track per pancnPh
78·11.
j. Install propeUcrspinner
and
secure to bulkhead
with
screws.
7B-l1. Ba.Ie Track. Blade track is the
ability
of
one blade
tip
to
foUow the other. while
routing.
in
almost the same plane. Excessive difference in blade traCk • more than .0625 inch· may be an indication of
bent
blades or
improper propeller installuion. Check blade u foUoWl:
a.
With thc cnJine
shut
down and blades vertical. secure to the aircraft a smooth board just under tbe
tip
of
the
lower
blade. Move the tip fore and aft
throup iu fuU
"bladc1hakc" m.vel. makin. small marles
with a pencil at each position. Then
center
the tip between these marks and scribe a line on the board
for
the full width of
the
tip.
b.
CarcfuUy route propcUcr by
hand
to
brinl the
opposite
blade
down. Center
the
tip
and scribe a
penc:illinc
u
before and check that lines arc not lCparated morc than .0625 inch.
c. Propellcn
haviDi excess blade m.ck should be removed and inspected for bent blades or for partS
of sheared "0"
rinI.
or forcip
particles. which have lodpd
bctwccn
hub and cnnkshaft
mountinJ
faces.
Bent blades
will require
repair and
overhaul of uscmbly.
POWER PLANT
ISSUED: BI1an2
2
E24
•