Piper PA-24 Comanche Service Manual page 347

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PIPER COMANCHE SERVICE MANUAL
iA·23. Propeller Goventar.
7A·24. Rcmoval Of Propellcr Governor.
I. Lift the left side panel of the engine cowling.
b. Disconnect control cable from governor control ann.
c.
Remove the governor mounting stud nua. It will be necessary to raise the ,overnor
as the nuts Ire
beinl removed before the nua can be completely removed.
d.
Remove the mounting guket. If the governor
is
to be removed for
a
considerable len,m of time
Ind mother unit is not substitutcd. it is advisable to covet
the
mountin.
p,ad to prevent darnqe caused by
foreign marter.
7
A' 25.
Inlta1Jation
Of
PropcUa'
Govcmor.
a. Clean the mounM, pad thoroughly making
very
ccruin that there
are
no forelgn
particles
in the
recess around die drive shaft.
b. Place the governor mounting lasket in position
with
the raised po"ion of the screen facing
away
from the elt(ine.
c. Alip the splines on the governor shaft·with the eriline drive Ind slidc the governor in position.
d. Raise governor off mounting pad enough to install washers IJSd
Start
mounting nuts. Torque nuts
evenly.
e. Connect the control cable end to the governor control ann.
E- Adjust governor control per p&taJt'lph
i
A·26 or 7A-27.
i A-26. Adjustment Of Propeller Govcmor. (Woodward) (PA-24-250) (Refer to Figure i A·5.)
I.
Start
the engme in accordance
with
the directions liven in Owner's Operating .\\an'.1l1 and 'allow to
warm up.
b. Push the "PROPELLER" cockpit control as far forward
as
it will go. At this position the governor
sp"d :Ldjusting control lever
will
be against the hi-rpm fine adjulti"' screw.
c. Observe engine speed. Adjust the governor speed by means of the fane
~d.bmnent
screw for 25iS
rpm. To do this. release the f&Stenen and lift the sidc e"linc cowling. Relcase the speed control lever damp
screw (...) and move the lever relative to the covet serrations. Once serration movement m a clockwise
direction produces a decrease in spced of 100 rpm; one sern.tion counter<lockwisc increases the speed 100
rpm. Onc revolunon of the hi-rpm fine adjllStment screw
in
a dOl:kwisc directicn decreases eng-lne speed 2S
rpm. counter-clockwise roration increases engine speed 25 rpm. for each revolution of the screw.
d. After
SCttlnj
the engine rpm at 2575. tilhten the l:ontrol lever clamping screw. and run the
self-locking nut on the fine adjustment screw against the stOp ri"l projection. Then safery,wlre the head of
the screw to the projection.
e. Fastcn cowling on both sides.
POWER PLANT
ISSUED: 8/18172
2
C15