Mooney M20K - Hydraulic Brake (Bleeding); Cleaning

MOONEY
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
CAUTION
3.
Attach
pressurized
hydraulic
fluid
service
unit
to
Battery
gases
may
be
explosive.
wheel
cylinder
bleeder
valve
and
open
valve.
Hydraulic
service
unit
should
be
free
of air
prior
to
servicing
2.
Inspect
battery
box
or
battery
mounting
area
for
aircraft
system.
corrosion
and
spilled
electrolyte.
To
clean
cables,
terminals,
and
battery
box,
use a
solution
of
4.
Feed
fluid
from
service
unit
into
brake
system.
bicarbonate
of
soda
and
clean
water
to
neutralize
Check for
air
bubbles
at
end
of
drain
line
immersed
in
fluid.
corrosion
and
spilled
electrolyte.
5. When
fluid flow
is
clear
of
air
bubbles,
close
wheel
CAUTION
cylinder
bleeder
valve
and
remove
service
line.
When
cleaning,
do
not
allow
bicarbonate
of
soda
to
enter
battery
cells
pennanent
damage
NOTE
will
result
if
soda
mixes
with
electrolyte.
Brake
pedal may
need
to
be
pulled
back
in
orderfornuid
to
bleed
back
into
reservoir.
3.
Rinse
battery
with
clean
water,
and
wipe
clean
with
a
dry
cloth.
6.
To
Meed
opposite
brake,
repeat
steps
3
through
5.
4.
To
retard
corrosion,
coat
terminals
with
petroleum
7. Remove
drain
line
from
reservoir.
jelly
after
cleaning
and
tightening
them,
3. Lower
fluid
level in
reservoir
to
two
inches
below
5.
Inspect
battery
ram
air
and
vent
for
obstruction,
filler
port.
line
kinks,
etc.
9.
Reinstall
filler
plug.
12-2043
TIRES
AND
WHEELS
10.
Inspect
brake
linings
for
excessive
wear
and
proper
installation.
Refer
to
Section
32-40-04
for
Brake
Keep
the
tires
at
recommended
air
pressure.
(Refer
to
Removal
and
Inspection
Procedures.
Chapter
6-00-01.
ii.
Depress
brake
pedals
to
check
for
sponginess.
1.
Inspect
tires
for
wear,
cuts,
and
bruises.
Resistance
should
solid
and
even
when
brake
2.
Inspect
valve
stems
for
evidence
of tire
slippage
pedals
are
depressed.
or
pulling.
12-20-06
CLEANING
3.
inspect
wheels
for
damage.
Cleanliness
is
a
major
prerequisite
to
adequate
4.
Inspect
wheel
bearings
for
condition
and
inspection
and
maintenance
of
an
aircraft.
Cleanliness
lubrication.
enhances
the
appearance
of
an
aircraft
and
reduces
the
probability
of
corrosion.
12-20-04
BRAKE
RESERVOIR
1.
EXTERIOR
Frequently
check
the
brake
reservoir
for
proper
fluid
A.
Before
washing
aircraft
exterior,
cover
brake
level.
See
Chapter
12-20-05
for
locations.
discs,
pitot
head,
and static
ports.
CAUT1ON
B.
Flush
away
loose
dirt
and
mud.
Do not
fill
reservoir
while
parking
brake
is
set.
C.
Wash
exterior
with
a
mild
aircraft
detergent
in
Use
only
hydraulic
fluid
(red!,
per
specification
cool
water,
and
a
soft
cleaning
cloth
or
chamois.
Rinse
Mll-l-l-5506.
Do
not
fill
reseNolr
above
two
inches
away
soap
film.
below
filler
port.
CAUTION
Do
not
use
so
called
"mild"
household
12-2045
-HM)RAUUC
BRAKE
(Bteeding)
detergents
to
wash
aircraft
exterior.
Such
CAUTION
detergents
may
damage
finish
and
corrode
Fluid
in the
wheel
cylinders may
be
under
high
aluminum
components.
pressure
due
to
expansion.
Therefore,
be
sure
CAUTION
parking
brakes
are
released
prior
to
beginning
Do not
apply
wax
or
use
pre-wax
cleaners
hydraulic
system
servicing.
during
initial
paint
curing
period.
Use
only
mild
For
best
results,
use
a
hydraulic
pressure
senrice
unit
aircraft
detergent
and
cool water
when
washing
(pressure
pot)
to
back bleed
the
system
through
the
exten~or
during
the first
90
days
after
repainting.
wheel
cylinder
bleeder valves.
D.
To
remove
heavy
oxidation
film,
use
a
pre-wax
1.
Remove
hydraulic
fluid
reservoir
filler
plug,
and
cleaner.
install
a
suitable
fitting
for
attaching
a
flexible drain
line
E.
Apply
an
e~denor-finish
wax
recommended
for
to
a
filler
port,
protection
of
urethane
enamel.
Apply
a
heavy
coating
2.
Immerse
open
end
of
drain
line in
a
hydraulic
fluid of
wax
to
leading
edges
of
wings,
empennage,
and
container,
nose
section
to
reduce
drag
and
abrasion.
i 2-20-03
OLDWILLWAYNE