Mooney M20R - Flared Fittings; Fuel System Troubleshooting

MOONEY
AIRCRAFT
CORPORATION
M20R
SERVICE
AND
MAINTENANCE
MANUAL
NOTE
When
removal
replacement
of
Individual
D~GITAL
FUEL
GAUGES
are
required
due
to
malfunctions,
recalibrate
each
new
fuel
gauge
to
read
´•7ja
the
replaced
one
in
accordance
with
the
adjustment
procedures
~hown
in
FCGURE
3948.
2&90-00
-MISCEUANEOUS
2&91100
TROUBLE
SHOOTING
FUEL
~1YSTEM
TROUBLE
PROBAB~
CAUSE
REMEDY
Fuel
gauge
not
indicating.
Broken
wirie.
Check
and
Repair.
Faulty
mitting
unit.
Replace
and
adjust.
Open
circllit
breaker.
Check
and
reset.
Fuel
gauge
indicates
full
when
Incomplete/
ground.
Check
ground
connection
at
transmit-
tanks
are
not
full.
ter.
Broken
wir~.
Check
and
repair.
No
fuel
pressure
indication.
Tank
empt~.
Check
and
service
tank.
(calibrated
test
gauges connected).
Defective
fJtel
pump(s).
Check
boost
pump
for
proper pressure
buildup.
Check
for
obstruction in
boost
pump
screen.
Inspect
engine
fuel
pump
and
check
valve.
Open
fuel
Ijne.
Repair
or
replace
line.
Fuel
selectbr
in
"OFF"
posC
Select
proper
position.
tion.
Fuel
pressure
low
or
surging.
Obstructiori
in
inlet
side
of
Check
and
clear
fuel lines.
Replace
or
(calibrated
test
gauges
connected)
pump.
Fau/ty
engine
pump.
rebuild
pump.
Inspect
hlel
lines
and
connections
for
leakage
end
damage.
Fuel
Selecgr
not
in
proper
Select
proper
position.
position.
Air
leak
in
$ystem.
Repair
leak.
2&92-00
FLARED
FlmNGS
When
installing
Rared
mings
and
hoses,
make
cated
before
they
are reinstalled.
Torque
all
fittings
in
threads
are
properly
lubricated
with
W-P-236
accordance
with
Rare
fitting
torque
chart,
Chapter
5,
tum
per
(Figure
28-5).
When
previously
i
Figure
5-1.
TAPERED
~PREEADS
7,
/-LUBRICATE
DO
NOT
STRAIGHT
THREADS
LUBRICATE
FEMALE
THREADS
NEVER
ALLOW
LUBRICANT
TO
CONTACT
THESE
SURFACES
LUBRICATION
OF
F/LARED
FITnNGS
FIGURE
2&5
28-92-00
~EV.
10-98
14
Island Enterprises