Piper Comanche PA-24 Service Manual page 570

PIPER COMANCHE SERVICE MANUAL
2. The low pi.ch stOp adjusanell.
is
awle by
a
screw
in the
IIOIe
of die propeller cylillder.
RotuiDs the
screw
clockwise iIu:rases die low pi.ch IIId reduces die RUic RPM
by abou. 100
RPM
for
each half
tIIm;
or vice vasa.
b.
After the low pitch stOp bu beea adjlllted for proper blade qle. die s o - r sboWd th ... be
adjllSted
'0
obtain maximwn rated ..... e RPM dllriDa tlke-off climb u
described
ill pansraph 7C·17.
7C·13. 8IIde TrKk. Blade trad is
die ability of
ODe
blade tip ro follow die other ... bile rorating. ill
aim .... die same plane. ExcOIIi ... cliffere!lCe..in blade track -more tbm .0625 inch- may be III inclfcation of
ben. blacla or improper propeUer
inrtaUatiOIl.
Check blade track u follows.
•. Wid! the
eftIine
shur down and blacla vertical.
RCIIft
rO
the aircraft
a _oadl board just
under the
tip of the lower blade. Move the tip fore and aft tbro"lb in fuU "blade-sb"'e" travel. 1DIkia.1IIIlll marks
with • peacil
at
each poaitioll. Tben center the tip bera .... dlae marIu &Dd scribe a liae 011 die board for
the fuU width of die tip.
b. CarefWly rowe propeller by hllld
.0
briIIJ die opposite blade' down. Cellter the tip and ICribc a
peacilline u before and check that lines are
DO'
,.arated more dI ... . 0625 inch.
c. Propellers haviac excess blade track, • ..:.1 be removed and inspected for ben. blades or for pans
of shared "0" ring. or fore.,. particles. which ha ... lodp between bub IIId crankshaft mounting fac ...
Ben. blad .. will require repair and overhaul of aascmbly.
7C·14. PropeUcr Go ...... or.
7C-15. RcmOYlli Of PropeUer Go¥aDor.
&.
Lif. the left side panel of the ""line cowling.
b. Dileonne .. control cable from governor control arm.
c.
Remove the aovcmor mounting stud nuts. It will be necessary to raise the governor as the mits an:
bemg removed before the
DUll
can be comple.ely removed.
d.
Remove the rnounrinB gasket. If the IOYerIlOr
is ro be removed for a considerable length of time
and ano.her uni, is no. substitu,ed. i. i. advisable
'0
cover the mounting pad
to
p ..... n. damage caused by
foreign nutter.
7C·16. InstaUaaon Of PropeUcr Governor.
&.
Clean the mounting pad thoroughly making very ccruin that there are no foreign particle. in 'he
re .... around the drive shaf ••
b.
Place the governor mountins guket ill position with the raiKd portion of the screen facing away
from the engine.
c. Align ,he splines on ,he governor shaft with the engine drive and slide the govcmo, in posi,ion.
d. RUse governor off mounting pad enough to insull washers aDd
st.art
mounting nuts. Torquc nuts
evcnly.
c. Conncct the conaol cable end to the governor conuol ann.
f.
Adjust goyernor control per parognph 7C·17. -
2
G14
POWER PLANT
ISSUEO: 8/18172