Mooney M20M - Page 342

MOONP/
AIRCRAFT
CORPORATION
M20M
SERVICE
AND
MAINTENANCE MANUAL
81-30-00
EXHAUST
SYSTEM SERVICING
TORQUE
PROCEDURES
1.
REFER TO SECTION
78-30-00
Torque
V-Band
coupling
to
40
Lb.-ln.
Tap
coupling lightly
around
circumference with
a
2. VISUAL
INSPECTION OF COMPLETE SYSTEM
non-metallic hammer
to
equalite
band tension.
A
thorough inspection
of
the
engine
exhaust
system
Re-torque coupling
to
60
Lb.-ln. and
tap
band
will detect
any
breaks
or
cracks
causing
leaks which
again.
Re-torque
to
a
final value of
55 to
65
might
result
in
the loss of
optimum
turbocharger
Lb.-ln.
efficiency
and
engine
power.
Inspect
exhaust
system
81-40-00
PERIODIC REPLACEMENT
per
SECTION
78-30-00.
COMPONENTS
81-30-01
INSPECTION
MULTI-SEGMENT
It is
recommended that
all
e~haust
system
pipes,
"V"
BAND
CLAMP
clamps
and miscellaneous
mounting
hardware be
1.
Using
crocus
cloth,
clean
outer
band
of
the
replaced
at
engine
overhaul
time
(2000
Hours).
multisegment’V"
band
clamp. Pay particular
attention
However,
a
thorough
inspection
of all
components
to
the
spot
weld
areas on
the
clamp.
should be made
any
time the exhaust
system
is
removed
from
the
engine
for
component
replacement.
2.
With
clamp
in
place
and
properly torqued:
The
inspection
should be made
in
the
interest
of
A.
Inspect
outer
band
in the
area
of
the
spot
welds
preventive
maintenance.
for cracks
(See Figure 81-2).
If
cracks
are
found,
replace
clamp
with
new
multi-segment
’Y" band
clamp.
NOTE
When
replacement
is
required,
install
new
"V"
band
clamp
over
the
exhaust
flanges
and
torque
according
t
following
procedures.
IYPICAL
SPOT
WELD
AREAS
"V"
BAND CLAMP SPOT
WELD
AREA CHECK
FIGURE
81
-2
4-99
81-30-00
OLDWILLWAYNE