PIPER
COMANCHE SERVICE MANUAL
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1.1'
FIGURE 7-5. HARTZELL PROPELLER GOVERNOR ADJUSTMENT POINTS
7-20
Adjustment
of
Propeller
Governor.
(Hartzell) (Refer
to
Figure 7-5 )
a
Start
the
engine
in
accordance
with
the
directions gi\'en in
the
Owners
Flight
Manual
and
allow
to
warm up
b.
Push the
"PROPELLER"
cockpit
control
as far
as
it
will
go
At
this position
the
go\ernor
speed
adjusting
control
lever will be against the hi-rpm fine adjustinll screw
c.
Observe engine speed Adjust the
governor
by means
of
the
fine
adjustment
screw for 2700 rpm
To
do
this. release
the
fasteners
and
lift the side engine cowling
Loosen
the fine
adjustment
screw locknut
and
turn
the
hi-rpm
fine
adjustment
screw in a clockwise direction
to
decrease engine speed
and
a counter-
clockwise
rotation
to
increase engine speed One revolution
of
the
fine
adjustment
screw increases
or
decreases
the
propeller
speed
approximately
15
RPM
d After setting the engine
rpm
at
2700.
run
the self-locking
nut
on
the fine
adjustment
screw against
the base projection
to
lock.
e
With
the
high
RPM
adjustment
complete.
the
control
system
should
be
adjusted
so that the
gO\ernor
control
arm
will
contact
the
high
RPM
stop
when the
cockpit
control
is
062
of
an
inch from its
full
forward
stop
To
adjust
the
control
travel. disconnect the
control
cable end from
the
governor
control
arm.
loosen
the cable end
jam
nut
and
rotate the end
to
obtain
the desired
control
clearance. Reconnect the
cable
end
and
tighten
jam
nut
f
It
is
usually only necessary
to
adjust the high R PM setting
of
the
gO\
ernor
control
system, as the
action
automatically
takes care
of
the
positive high pitch setting
g Fasten
the
cowling
on
both
sides.
ISS (jED:
8/18/72
2A22
POWER
PLA!\<_
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