Mooney M20K - Nose Gear Steen~Ng System

MOONEY
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAlNTENANCE
MANUAL
C.
Disconnect
and
cap
hydraulic
lines.
D.
Remove
parking
brake
valve.
-DISASSEMBLY
5
Disassemble
parking
brake
valve
(Refer
Figure
97
32-/8).
o
A. Remove
both
Mtings
(1)
from
valve
housing O,
I
fi\
S
9
L
4
springs
(8)
will
come
out
with the
fittings.
B.
Remove
poppet
valves
(2)
and
pins (3),
from
housing
by
bumping
on
table
top.
C.
Remove
both
fittings
(4)
from
end of
housing.
1 3
D.
Remove
snap
ring
(5)
from
end
of
camshaff
2
assembly
(6).
E.
Carefully
remove
camshaft
assembly (6)
from
housing.
F.
Inspect
all
components
for
damage,
nicks,
gr00VeS,
etc.
PARKING
BRAKE
VALVE
FIGURE
32
-18
G.
Clean
all
parts
with
cleaning
solvent
(Federal
Specification
No.
PS-661).
B.
Connect
valve
assembly
to
hyd~aulic
lines.
i-i.
Replace
all
O-rings (9).
C.
Bleed
system
and
service
hydraulic
reservoir
with
hydraulic
fluid
as
described
in
Section
12-20-05.
-REASSEMBLY
A.
Reassemble
parking
brake
valve
in
reverse
sequence
of
disassembly.
32-41-00
TROUBLE
SHOOT1NG
BRAKE
SYSTEM
TROUBLE
PROBABLE
CAUSE
REMEDY
Solid
pedal
and
no
brakes.
Brake
lining
wom
beyond
Replace
lining.
allowable
limit.
Spongy
brake.
Air
in
system.
Bleed
brake
system.
Pressure
will
not
hold.
Leak in
brake
system.
Visually
check
entire
system
for
evidence
of leaks.
Parking
brake
will
not
hold.
Air
in
system
or
leak
in
system
See
remedies
above.
(downstream
of
parking
brake
valve).
Defective
parking
brake
valve.
Repair
or
replace
the
valve.
Brake
grabs.
Warped
or
bent
disc.
Replace
disc.
Foreign
matter
locking
disc.
Clean
disc
and
lining.
Brake
pedal
will
not
return
to
Master
cylinder
shaft
or
other
Check that
shaft
travels
in
straight
neutral
position,
linkage
misaligned.
line
and
not
binding
in
linkage.
3280-00
-STEERING
NOTE
Check
nose
gear
leg
assy.
for
towing
damage.
326091
NOSE
GEAR
STEERING
SYSTEM
Replace
if
any
dent
exceeds
1/32
inch
(SIN
The
nose
gear
steen’ng
system
consists
of
a
steen’ng
25-0001
thru
25-0823).
hom
on
gear
leg
linked
to
the
rudder
pedals
by
push-pull
tubes
and
belicranks.
Gear
retradion
NOTE
automatically
disengages
steering
mechanism
from
Aircraft
S~
25-0824
8
ON
have
twin
limiter
nose
wheel.
(Sedion
27-20-00
outlines
nose
gear
pads
and
adjustable
stops
(7),Fig.
32-19,
steering
rigging.)
A
centering
cam
aligns
nose
wheel
installed
on
the
nose
gear
leg
assembly
(A)
that
for
ent~y
into
wheeCell.
will
prevent
turning
damage
to
leg
assembly.
32-41-00
22
OLDWILLWAYNE