Mooney M20K - Druck Transducer Test Procedure

MOONC/
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
79-40-00
DRUCK
fRANSDUCER
TEST
If
pressure
reads
incorrectly,
zero
or
pegged
PROCEDURE
condition:
1.
Rochester
Gauge
250001
thru
25-1224
CAUTION
(with
Druck
transducer
installed).
This
unit
is
for
troubleshooting
only.
DO
NOT
ATTEMPT
TO
CALIBRATE
WITH
MIS
UNIT.
A.
Move
transducer
text
box
to
connector
on
the
input
of
the
appropn’ate
pressure
amplifier
(located
The
DNck
Transducer
Test
Box,
GSE030036,
can
be
behind
instrument
panel,
right
side).
Check
pressure
used
to
simulate
Fuel
and
Oil
pressure
in
Mooney
reading
on
Rochester
gauge
to
see
if
a
approximately
model
M20K
that
have
the
DNck
pressure
transducer
agrees
with
the
te>d
box
If
it
does, repair
wire
harness
installed,
from
pressure
gauge
amplifier,
to
the
engine
To
use
the
unit
for
troubleshooting,
the
box
is
compartment.
If
pressure
reading
is
incorrect
go
to
step
connected
to
the
aircraff
harness
in
the
engine
compartment,
by
disconnecting
the
appropriate
Druck
transducer
electrical
connector
and
connecting
the
test
B.
At
the
appropriate
Rochester
gauge
WIPER
lug
read
the
following
voltages
to
ground.
(digital
box
in
its
place,
multimeter
or
20K
ohmsivolt
multimeter).
Tum
on
Airc~aff
Master
Switch
(insure
engine
gauge
Oil
"O
PSI
C.1
to
6.6
volts
circuit
breakers
are
in)
and
adjust
box
to
appro~dmate
pressure
desired.
The
engine
gauge
should
read
thb
approximate
pressure.
2.
SIGMA
TEK
Gauge
25-1225
thru
25-TEA
If
pressure
reading
is
correct:
(with
Druck
transducer
installed)
i.
Verify
OiVFuel
pressure
to
DNck
transducer
with
A.
Check
win’ng
for
continuity
between
engine
mechanical
pressure
gauge.
compartment
connectorand
Sigma
Tek
cluster.
If
A.
If
correct-probable
failure
is
Druck
Transducer
win’ng
is
cormcd
go
to
(2.,8.).
B.
If
incorrect-troubleshoot
oillfuel
system.
B.
Probable
failure
is
Sigma
Tek
gauge
module on
cluster,
replace
module.
79-40-00
OLDWILLWAYNE