Blade Track; Propeller Governor Removal; Propeller Governor Installation - Piper PA-24 Comanche Service Manual

•
•
•
PIPER COMANCHE SERVICE MANUAL
1-15. Blide Track. Blade tn.Ck is the ability of one blade tip to foUow the omer. while rouMg. in almost
the same plane. Excessive difference in blade track • more than .0625 inch • may be
aD
indication of bent
blades or improper propd1cr iJm&lla.tion. Check blade
aack as
foUows:
a. With
the eDJine shut down and blade, vertical.
scauc
to the
aircra.ft
a smooth boud
jun
under the
tip of the lower blade ..\tove the tip fore &Dd aft
throup
its full "bladHbake" ttlvcl. making smaJ1 marks
with
a
pencil at each position. Then c:en"r the tip between tIlac marks aDd scribe a line on the board for
the full width of the tip.
b. Carefully route propeller by hand to brinl the opposite blade doW'll. Cmter the tip and scribe a
peneillinc as bctore and check that Iincs are not
sepan.tcd
more than .0625 inch.
e.
PropeUers havilll excess bl.adc track should be removed md iDlpcCftd for bent blades or for partS
of sheared "0"
rinI.
or fomp particles. which have
lodted
berwCCD
hub and cnnJuhaft mounting faces.
Benr blades will require rq>air aad overhaul of aacmbly.
i -16. Propeller Governor.
i ·17. Removal Of Governor.
a.
Life both engine cowl side panels by loolCDinJ the
,ix
fastmers.
b. Disconnect control able from govemor collII'ol arm.
c. Remove control able from cable bracket by
mnO¥inlluul. wuhcrs. screws
and clamp.
d. Remove the governor
mOlllltinJ
stud Dua. It
will
be
llCeaaty
to
nisc
the lovcmor
as
the nuts are
being
removed before the nuts
can
be completelY
removed.
e. Remove we mountinr guker. If the govcmor
is
to be removed for a considerable length of time
and another unit
is
not substituted. it is advisable to cover the
mountin,
pad to prewnr damace caused by
f oreilJ'l rnaner.
7·18. IftIU11alionOf Governor.
a. Clean the mounting pad thoroughly making very certain that there are no fOreign particle, in the
recess around the drive shaft.
b.
Place the governor mounting ,asker in position with the
raised
portion of the screen facing away
from the enJine.
c. Insull the control cable bracket on the governor.
d. Align the splines on the governor shaft with the cnpne clriveand slide the governor into position.
e. Ra.isc governor off mountiq pad enough to
instaU
washers and
start
mounting nuts. Torque nuts
evenly.
i.
Connect the control cable end to the governor contrOl ann.
g. Secure control cable to cable bracket.
h. Adjust governor control
per
paracrapb 7-19.
POWER PLANT
ISSUED: 8/18/72
2
A20