Mooney M20K - General; Turbocharger Control System (Rotomaster); Test Procedures; Turbocharger Control System (Airesearch)

MOONC/
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
81-00-00
GENERAL
81-10-20
TURBOCHARGER
CONTROL
SYSTEM
(AIRESEARCH)
TURBOCHARGER
OPERATION
(25-1000
thru
25-TEA)
The
turbocharger
increases
the
power
output
and
efficiency
of
the
engine
by
supplying
compressed
air
to
The
turbocharger
output
is
controlled
through
the
intake
manifold.
The
engine
exhaust
is
routed
to
coordinated
action
of
the
variable
wastegate
valve
and
turbine
wheel
ofturbocharger
assembly.
The
amount
of
absolute
pressure
controller
system
when set
up
exhaust
gas
passing
over
the
turbine
wheel
is
properly.
(See
Figure
81-2).
controlled
by
a
waste
gate
assembly.
Exhaust
gas
CAUTION
passing
over
the
turbine
wheel
causes
the
compressor,
h
is
mandatory
that
the
turbocharger
system
be
mounted
on
the
same
shaft,
to rotate.
Ambient ram
air,
properly
adjusted
prior
to
operation.
See
supplied
through
an
air intake
on
right
side
of
cowling,
Section
714050
for
-MB
3
SE
engine
set
up
is
filtered
and
routed
to
the
compressor
where
it
is
procedures.
compressed
and
delivered
to
engine.
As
engine
power
is
increased,
the flow
of
exhaust
over
turbine
wheel
TURBOCHARGER
OVERBOOST
PROTECTION
also
increases, resulting
in
a
proportionate
increase
in
(25-1000
thru
25-TEA)
the
speed
of
the
rotating
assemblies
and
turbocharger
overboost
output.
The -MB
3
-SB
engines
incorporate
protection
through
a
pressure
relief
valve
located
between
the
compressor
and the
throttle
body.
The
81-10-10
TURBOCHARGER
CONTROL
SYSTEM
--(ROTOMASTER)
relief
Mlve
will
open
to
prevent
excessive
manifold
pressure
a
a
malfunction
in
the
tu~ocharger
regulation
(srm
99-9991
thru
25-0999)
system
occurs.
81-~10-21
-Adjustment
3 Test
Procedures
The
turbocharger
output
is
controlled
by
the
throttle
See
Section
71-00-50.
control
in the
cockpit
indirectly
dun’ng flight
operations.
The
fuced
waste
gate
assembly
is
a
ground
adjustable
SM
25´•~
000
through
252012*
unit
only
(Ref.
Fig.
81-1).
The
overboost
valve
should
open
and allow
the
engine
manifold
pressure
to
stabilize
between
37.0 3
38.0
CAUTION
inches
Hg.
if
operating
properly.
If
manifold
pressure
It is
mandatory
that
the
waste
gate
be
properly
exceeds
38.0
inches
Hg.
dun’ng
this
check,
the
adjusted
prior
to
aircraft
operation.
See
Section
overboost
valve
should
be
replaced.
71-0050
for
-GB
or
-LB
Engine
Setup
Procedures.
CAUTION
DO
NOT
exceed
38.0
Inches
Hg.
manifold
TURBOCHARGER
OVERBOOST
PROTECTION
pressure
for
more
than
ten
(10)
seconds.
(SrN
25-0001
thru
25-0999)
S/N
25-2013
through
25-TEA’
The
overboost
valve
should
open
and
allow the
engine
The
-GB 5
-LB
engine
incorporate
overboost
protedion
manifold
pressure
to
stabilize
between
39.0
3 40.0
through
a
pressure
relief
valve located
between
the
inches
Hg.
if
operating
properly.
If
manifold
pressure
compressor
and
throttle
body.
The relief
valve will
open
exceeds
40.0
inches
Hg.
dun~ng
this
check,
the
to
prevent
excessive
manifold
pressure
if the
throttle
is
overboost
valve
should
be
replaced.
inadvertently
opened
beyond
limits.
Referto
Airesearch
and
TCM
Service
and
Maintenance
Manuals
for
detailed
maintenance
data.
81-10-11
-Test
Procedures
’SM
252000
thru
25-2012
may
be
retrofrtted
to-SE
(See
Section
71-00-51,
3,
1,
(3).
engine
configuration,
if
desired
by
owner,
by
complying
The
overboost
valve
should
open
and allow
the
engine
With
Mooney
Aircraft
Corporation
retrofit
drawing.
manifold
pressure
to
stabilize
between
42.0"
and
44.0"
81-1030
-ALTERNATE
AIR
SYSTEM
Hg.
if
his
operating
properly.
If
manifold
pressure
TURBOCHARGER
OPERATION
exceeds
44.0"
Hg.
during
this
test,
the
overboost
valve
should
be
replaced.
The
tu~charger
system
will
continue
to
operate
when
the
pn’mary
air
source
is
obstructed.
An
engine
CAUTION
altemate
air
system
is
provided
(automatic
system
on
Do
not
exceed
40.0"
Hg.
for
more
than
ten
(10)
SM
25-0781
thru
25-TEA)
to
allow
air
from
inside
the
seconds.
cowling
to
pass
through
the
compressor
and into
the
engine.
This
air is
warmer
than
primary
air
so
less
NOTE
power
will be
available
at
normal
throttle
settings.
Inspect
turbocharger
per
TCM
Service
Bulletin
NOTE
No.
M833
or
later
information
Inspection
of the
induction
system
and
(Ref.
AD
82-07-03).
turbocharger
assembly
should
be
conducted
after
any
obstruction
of
the
primary
air
source
prior
to
the
next
engine
operation.
81-00-00
OLDWILLWAYNE