Piper PA-24 Comanche Service Manual page 442

P'PER COMANCHE SERVICE MANUAL
2. The low pitch ROp adjusancnt is made by
a
screw
in the DOse of the ptopdlcr cylinder.
Rotatin, the screw clockwise iJlerases the low pitcb aDd reduces the staae RPM by about 100 RPM for
each
half
nun;
or vice
vasa.
b. Alter the low pitcb Rap hu been adjlllttd for propu blade
q1e.
the JOYemOr should then be
adjusted to obcain
maximum rared
cacmc
RIM
dUriJII akc-off climb
as dacribcd ill pU'IfDpb 7C·17.
1C-13. Blade Track. Blade
cnc.:k is
tbe ability of oae blade tip
to
foUow tbe other. wbile rocatin,.
in
almost thc samc plane. Excessive diffcrnce.in blade tn.ek • more
thaD .062'
inch •
may be
aD
indfeation of
bent blades or impropcrpropcUcr iDsallMioa.Cbeckblade aICk u follows:
a. With the eJIIine shllt
down IUId blada
vertic::a!. secure to the aircraft" smooth
boatel JUSt
under the
tip of the lower blade.
~O¥e
the tip fore aDd aft duoUfb iu fuB "bLadc1bakc" mYel. makin, small marlc.s
with a pencil at eacb position. Then center the tip becween thae
lIW'ks &lid
scribe " line on the bovd for
the
full
width of the tip.
b. Cudully !'Otlce ptopc11cr by haDd co
brill,
the opposite
bWl.
do'Wll. Center the tip and
scribe
a
penci11inc as before and chcc.k that 1iacs
&rC
not scpuatcd more chaD
.062'
incb.
c. Propcllcn baviq excess blade track should be removed
aDd
inlpected for bent blades or for pans
of sheated "0"
rinI.
or forcip panicles. wbich bave lodpd bctwea bub a.Dd cnnkshalt mOllnting faces.
Benc blada will
require
repair and overhaul of assembly.
1C-l~.
PropcBcr GOftftlOr.
•
1C·15. Removal Of PropcUcr Govcmor. •
a. Lift the !eft side panel of the CftIiae cowlin,.
b. Disconnect control cable from governor control ann.
c.
Remove the governor mOllntiftJ stUd Dilts. It will be neccssuy eo raise the ,overnor u the nuts arc
bem! removed before the nllts can be completely removed.
d. Remove ehe mounnn, gasket. If the covemor is to be rcmowd lor a considcnblc leftJth of rime
and Uloehcr lUlie is noe sllbstituted. ie is advisable to coYer the cnountinl pad to prewnt damage caused by
foreign matter.
7C·16. InstaUaQon Of PropcUerGovernor.
1.
Clean the mounting pad thoroughly makin,
very
certain that
thCfC
are no forciJn panicles in the
recess around the drive shafe.
b.
PI"ce the IOvcmor mounting gukcc ill position with the raised ponion of the screen facinl away
from the cnline.
c. Align the splines on the govcmor shafe with the enline drive and slide the IOvcmor in posicion.
d. Ra.isc governor off mounting pad enollsh to insull washers and sun: mountinl nutS. Torque nuts
evenly.
e. Connect the control cable end to the JOVemor conuol urn.
f.
AdjuR gov.crnor concrol per parqnph 1e·17.
POWER PLANT
ISSUED: 8/18/12 •
2
G14