PIPER
COMANCHE
SERVICE
MANUAL
7·15. Blade
TrKk.
Blade track is
dI.
ability
of
oa.
blad.
tip
to
foUow die ocher. ",bile
routiag.
iD
almost e
die
same plaae. Excessive
difftmICt
iD
blade track •
mort
tban
0615
iDch
• may
b.
&a
iDdicatioll
of
ben,
blades
or
improper
propelkr
iIIm",nQ'" Cbeck blade track
..
foUows,
L With the
encin.
shu,
doWlland blades vertical. secure
'0
the
aircraft a srnoodl b'>ard just
und.r
the
tip of the lower blade. Move the tip
fort
&ad
aft
<broach
ia
fuU
"b~ake"
trayel.
makiDs
smaU
marks
with
a pencil
at
each positio ...
Tben
ceater the tip between th
...
rrwi<. and
scribe
a
liDe
on the board for
the
fuU
width
of
the tip.
b.
CarefuUy rotate
propelkr
by band
'0
brill.
the opposite blade do
....
Ceater the tip
&nd
scnbe •
pencilliDe
..
before
and
check cba, lilies
are
aD, separated more dian .0615 inch.
c.
PropeUm
haYins
.xcess
blade track should
be
removed
&nd
inspected for bcDt blades
or
for parts
of
sheared
"0"
riDs.
or
fo....,
particles. which have
lodJcd
between hub
aDd
crankshaf, mountiag faces.
Bea,
blades
will
require
repair
ancI
overhaul
of
userably.
7·16. PropeUer
Go
.......
or.
7·17.
RcmoyalOfGovcmor.
•.
Life b'>th engine cowl side panels by
looseaiq
the six fasteners.
b.
DisconncC! c:onaol
able
from
SOverDor
conaol
arm.
c. Remove concrol
cabl.
from cable bracket
by
l'CDIoYins
Dua.
wuhers.
screws
aDd
clamp.
d.
Remove
'he
sovcrnor mountiag stud Dua.
It
wiD
be Deceuary
'0
rlIisc
the goveraor
..
the
DUt5
are
beinJ
removed before the
nua
....
be completely removed.
e. Remove the mountiag gasket.
If
die
governor is
'0
be removed for I conaidenble lensm
of
time
aDd
another unit is
no,
substituted.
i,
is
advisable
'0
cover the mounting pad
to
prevent damage caused by
fomp
maner.
7·18. IasWlation
Of
Goyeraor.
a. Clean the mounting pad thoroughly making very
cecuin
thac there are no
fomgn
particles
in
the
recess
around the drive shaft.
b. Place
the
governor mounting gasket
in
position
with
the:
raised.
panion
of
the screen
f&cang
away
from the engine.
c.
InsuU the
cODtrol
cable bracket
on
the governor.
d.
Align
'he
splines
on
the governor shaft with the engine drive and ,Iide
'he
governor
in'o
posiuon.
c.
Raise
,overnor
off
mountinl
pad enough to
inSt&ll
washen
and
start
mounting nutS. Torque nuts
evenly.
f.
g.
Connect the control cable end to the
lovemor
control arm.
Secure
control
,able
'0
cable bracker.
h.
Adjust governor
conaol
per
puagnph
7·19
POWER
PLANT
ISSUED:
8/18172
2
A20
e
e
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