Mooney M20M - Page 164

SERVICE
AND
MAINTENANCE
MANUAL
M20M
MOONEY
AIRCRAFT
CORPORATION
2.BRAKES
BREAKINPROCEDURES.
out
by
spring
(5)
when roll
pin
is
removed),
spring
(5)
NOTE
and
piston (7).
Brake
pad
conditioning
is
required
to
properly
(5)
Remove
O-ring packing
(6)
from
piston.
cure
the
resins
binding
the
lining
composition
(6)
Remove
stat-o-seal
(8)
from
piston
rod.
together.
Excessive
heat created
prior
to
conditioning
will
carburize the
lining
matetial
(7)
Clean all
parts
with
cleaning
solvent
(Federal
and
prevent
the
attainment
of maximum
braking
Specification
No.
PS-661).
coefficient.
(8)
Inspect
cylinder
for
cracks,
scoring,
or
grooves
in
bore.
Proper
conditioning
may
be
accomplished
as
follows:
(9) Inspect
piston
(7)
for
damage,
check for nicks
A.
Perform
a
minimum
of
six
(6)
light
pedal
effort
and
scratches
braking
applications
and
two
(2)
hard
stops
from
21
to
35
KIAS.
Allow
the
brake
discs
to
partially
cool
(10) Inspect
spacer
(11)
for
damage.
between
stops.
(11)
Inspect
push
rod for
scoring,
grooves,
nicks
The
procedure
will
generate
sufficient
heat
to
cure
the
and
scratches.
resins
in
the
lining,
but
will
not
cause
the material
to
(12)
Inspect
piston
return
springs
(2)
for
become
carburized
due
to
excessive
heat.
permanent
set
and
proper
length (3.670
in.
min.,
4.05
3.
MASTER CYLINDER
in.
max.).
REMOVAL
AND
DISASSEMBLY
(13)
Replace
all
faulty parts
and
all
o-rings.
(27-0001
THRU
27-0106).
(14)
Reassemble
in
reverse
sequence
of
A.
Remove left
hand,
lower
fuselage
skin
aft
of
disassembly.
Immerse
all
parts
in
hydraulic
brake
fluid
firewall
and
exhaust
cavity.
prior
to
reassembly.
B.
Disconnect
hydraulic
cylinder
from
pedal
linkage.
F.
Reinstall
master
cylinder
in
reverse
sequence
of
removal.
C.
Disconnect
and
cap
hydraulic
lines.
G.
Bleed
brake
system
(refer
to
SECTION
D.
Disconnect
hydraulic
cylinder
from
bracket
and
12-20-05).
remove
cylinder.
E.
To
disassemble
NOTE
master
cylinder:
(Parker-Hannifin)
(See
Figure
32-19).
S/N
27-0107
and later
A/C
have
larger
capacity
Master
Cylinders
installed.
(1)
Unscrew
and
remove
rod
end clevis
(15)
and
nut
(14)
from
piston
rod
(9).
REMOVAL
AND
DISASSEMBLY
(27-0107
THRU
27-TEA).
(2)
Remove
snap
ring
(13)
and
lift
out
complete
piston
rod
assembly,
(items
3
thru
12).
A.
Remove left
hand,
lower
fuselage
skin aft
of
firewall
and
exhaust
cavity.
(3)
Remove
spacer
(11)
and
o-ring
packings,
(10
and
12)
from
piston
and
assembly.
B.
Disconnect
hydraulic
cylinder
from
pedal
(4)
Disassemble
piston
rod
assembly by
linkage.
removing
roll
pin
(4),
(spring
guide (3)
will be
pushed
C.
Disconnect
and
cap
hydraulic
lines.
87
5
11
’9
\"6
15
L
13
(27-0001
THRU
27-0106)
SM32-19
7
4
14
7
10
15(27-01
27-TEA)
t~
SMX32-19A
MASTER
BRAKE
CYLINDERS
(PARKER-HANNIFIN)
FIGURE
32-19
32-40-04
4-99
20
OLDWILLWAYNE