Piper Comanche PA-24 Service Manual page 530

PIPER COMANCHE SERVICE MANUAL
n-Io. lJIIIaIlatioD Of PropcIlcr. (Refer to Fipre 7B-I.)
&.
Politioa dle spinDer bulkhead
(7)
opiDst dle staner
rinI
par
IIIppOrt (8) so that oa arrow lines up
with the Tel on the &oa. face of <he IIIppOrt.
b. Secure the spinner bulkhead .0 the saner ring
gear
SUppOrt with 1% bola. aua aDd Z4 washen.
(Oae meier the bol. head and one under each au •• ) Carefully
tiJbtcD
DUD
unifonaly to torque limia shown
in Table VII-I.
c. C1 ..... the propeUer aDd CDgine
f1anaes.
d. ObSft'le the staner
rinI
sear
.0
make
111ft
i< is mounted properly oa the enpe crankJhatt f\ange.
The c:nnkJhah
flanse
is
swnped with aD "0" awl< aDd the staner ri"l
par
is
likewise
identified by an
"0" 1IWk. Upon iDsWIation of the .........
ring
par.
the
marItinJS
sball be maced
.0
imure proper
iJII<alJation.
e. IIIK&ll "0"
rinI
(6) aDd shim
(5)
oa the
.,.me
sbaf •.
CAUTION
I. is absolutely ...... tia.I <hat
sbim
(5)
be insWled
u
failure to do
so
may raul. in failure of the mountillJ bola due to relative movcmea. of
dle twO flanges.
f.
RaiJc
the propeUer intO positioa widl the enpe .... d slide <he propeUer on.o the propeller
mouatillJ bushinp.
g.
Insall the mountillJ bola (4) in the propeUer hub and secure propeUer to engine flange.
h.
Torque bola to specification given in Table VIlB-I and safety.
1.
Check blade
cradr. pet
puqraph 7B-II.
J.
Install propeUer spinner and secure to bulkhead with screws.
n-II. Blade T .... k. Blade track is <he lbility of one blade tip to foUow the other. while rotating. in
almos. the same plane. Excessive difference in blade track • more than .06%5 inch • may be an mdication of
bent blades or improper propeUer installar:ion. Check blade u foUows,
a.. With the engine shut down and blades vertical. secure to the aircraft a. smooth board
JUSt
under tbe
tip of the lower blade. Move the tip fore aDd aft
throllJh
iu fuU "blade-shake" tnvcl. making small marks
with a pencil
at
each position. Theil cen.er the tip between these marks and scribe a line on the board for
.he fuU width of the tip.
b. CarefuUy rotate propeUer by hand to bring the opposi.e blade down. Center the tip and SCribe a
pencil line u before and check
<ha.
lines arc not separated more than .06Z5 inch.
c. PropeUers having excess blade track should be removed and inspecrcd for bent blades or for pam
of sheared "0" ring. or foreign particles. which have lodged between hub and crankshaft mounting face •.
Bent blades will require repair and overhaul of :wembly.
POWER PLANT
ISSUED: 8118n2
2
E24