Mooney M20M - Maintenance Practices

MOONEY
AIRCRAFT
CORPORATION
M20M
SERVICE
AND
MAIMENANCE
MANUAL
~iU
O
0‘0‘
O ~O
t,
I,
O
VACUUM
PUMPS MAY
VARY,
BUT
SMEAR
COUP
LING
WILL
BE
SIMILAR
FOR
MOST
VACUUM
PUMPS.
SMX37-2
DRY
AIR
PUMP
COUPLING
INSPECTION/REPLACEMENT
FIGURE
97-2
A
complete
check
out
and maintenance
of the entire
NOTE
vacuum
system
is
necessary
if either
pump
If
during
inspection,
the
AND
20000
pad
seal
experiences
a
malfunction.
shows
signs
of
leaking,
the
adapter
plate
and
drive extension
must
be
removed
to
allow
It
Is
recommended
that the
tall-cone mounted
to
engine
start
to"v~Rsystem
be turned
ON
prior
replacementof
pad
seal between
drive
stand-by
vacuum
extension
and
AND
20000
pad.
A
gadret
le
also
t~hat
the
vacuum
gauge
(if
equipped)
indicates
normal
operating
vacuum
and
required
between
drive
extension
and
stanc~by
that the
gyros
spin
up
and
erect.
When
engine
is
pump/clutch
adapter
plate.
No
gasket
Is
started,
the
check
valves
closes
and
the
stand-by
required
between
stand~by
pump/clutch
vacuum
pump
system
will
not
produce
sufficient
assembly
and
adapter
plate
pad.
additional
vacuum
for
any
indication
on
the
gauge
(if
3742-02
INSTALLATION
OF
NEW
STANDBY
equipped)
to
be
noticible.
VACUUM
PUMP
ASSEMBLY
3742-00
MAINTENANCE
PRACTICES
1.
Refer
to
Section 37-11-04
for
installation
of
new
The
stand-by
vacuum
pump/clutch
assembly
is
stand-by
vacuum
pump/clutch
assembly.
No
gasket
is
mounted
below
the
main
vacuum
pump
’equired
between
stand-by
pump/clutch
assembly
approximately
centered
on
engine
accessory
case.
a"d
8dapter plate
pad.
2.
Replace stand-by
vacuum
pump/clutch
assembly
3742-01
REMOVAL-
(CLUTCH
DRIVEN)
as a
complete
unit.
1.
Disconnect
hoses
from
stand-by
vacuum
3.
Replace
all lockwashers.
Tighten
mounting
nuts
pump/clutch
assembly.
90 110
in. Ibs.
2.
Remove
four
(4)
socket
head
cap
screws
WARNING
attaching
stand-by
pump/dutch
assembly
and
If
adapter
plate,
to
mount
stand-by
pump/clutch
remove
assembly
from
adapter
plate
pad.
The
assembly,
has been
removed
for
any
reason,
It
adapter
plate
does
not
require
removal.
is
necessary
to
apply
loc-tlte,
271
on
threads
3.
Proceed
with
inspection
of
stand-by
vacuum
of flush
head
attaching
screws
(4 each)
and
pump/clutch
assembly
per
steps
in Section
37-11-03,
torque
each
screw
to
70
Inch
Ibs.
steps
3
and
4.
4-99
37-42-00
OLDWILLWAYNE