Mooney M20M - Page 279

MOONEY
AIRCRAFT CORPORATION
M20M SERVICE AND
MAINTENANCE
MANUAL
NOTE
CAUTION
All
rigging
to
match
governor
arm
location.
Do
Recheck
safety
wire,
security
and
thread
not
adjust
governor
high
RPM
stop
to
match
engagement
on
all
engine
controls
after
rigging. adjustment
rigging
or
assembly.
61-20-20
PROPELLER GOVERNOR
NOTE
CONTROL
RIGGING
Vernier controls friction
can
be
adjusted
by
i.
Disconnect
propeller
governor
control rod.
loosening
the
lock
nut
on
back
side
of
panel
and either
tighten
the
nut
on
front of
panel
to
A.
Remove
cotter
pin,
nut,
bolt
and washers from
increase friction
or
loosen the
nut to
decrease
rod
end at
propeller
governor
control
arm.
friction.
Retighten
the
lock
nut
on
back side
to
B.
Disconnect
control rod
from
governor
control
secure
cable
to
the
panel.
arm.
61-2030
-GOVERNOR ADJUSTMENT
2.
Adjust
control
arm
spring
to
minimum tension
i.
Fly
aircraft
and
record
maximum
RPM
at
takeoff
or
which
will
return
control
arm
to
maximum RPM.
cruise
flight
at
full
power.
NOTE
3.
Push
propeller
control
in
cockpit
full
forward.
Pull
No
adjustment
can
be
done
before
a
test
flight
control
back
approximately
1/8
inch
and
lock in
this
is
done
to
obtain
maximum
governor
RPM.
position.
2.
Remove
upper
engine
cowl
for
access
to
4.
Place
governor
control
arm
against high
RPM
stop
govemor.
screw.
3.
Loosen
high
RPM
screw
jam
nut.
5.
Adjust
propeller
control
rod
end
to
coincide
with
the
governor
arm
position.
4.
Turn
screw
in
(CW)
or
out
(CCW)
to
match
RPM
recorded
during
governor
test
flight.
One
full
tum
of
6. Attach
control
rod
end
to
governor
arm
and
screw
equals approximately
25 RPM.
replace
cotter
pin.
5.
Tighten
jam
nut
and
make
propeller
control
linkage
7.
Operate
the
propeller
control
from
cockpit
to
verify
adjustments
as
necessary
to
maintain full travel.
full travel
of
control
arm
in
both
directions,
high
RPM
to
minimum RPM
stop.
6.
Re-rig
disconnected
controls
and
reinstall
cowling.
NOTE
7.
Perform
propeller
and
govemor
operational
tests.
Fly
aircraft and
repeat
governor
test
flight
and record
When
propeller
control
rigging
is
complete,
maximum
RPM
in
flight
at
maximum
power.
Repeat
check controls
in
cockpit
to
be
sure
there
is
.03
this
process
until
proper
maximum
RPM
setting
is
to
.06
inch
cushion
between
control
knob
and
achieved.
adjustment
nut
on
instrument
panel.
The
control
should
not
bottom
out
when
pushed
full
NOTE
forward.
When
installing
a
governor,
insure
that
oil
system
is
purged
of all
air
by
cycling
propeller
several times
before
flight.
61-2080 PROPELLER GOVERNOR TROUBLE
SHOOTING
TROUBLE
PROBABLE
CAUSE
REMEDY
Leakage:
Between control shaft
and
Damaged O-Ring.
Replace
with
new
O-Ring.
head.
Between
head and
body.
Damaged
head
and
bodygasket.
Replace gasket.
Between
relief
valve
plug
and
Damaged
relief
valve
plug
Replace
gasket.
body. gasket.
Between
body
and base.
Damaged
body
and base
gasket.
Replace
gasket.
Between
governor
base
and
Damaged
governor
mounting
Replace
gasket.
engine mounting
pad,
gasket.
Loose
governor
attaching
nuts.
Retighten
nuts.
Warped
engine
mounting
pad.
Consult
engine
manual.
Inability
to
attain
proper
RPM
Wrong
high-RPM
governor
Reset
governor
external
high
RPM
during
static
ground
run:
setting.
adjustment
screw.
Incorrect
system
rigging.
Adjust
control
system.
4-99
61-20-20
OLDWILLWAYNE