Raytheon Beech Baron E55 - Page 338

Raytheon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
NOSE
GEAR-OVERHAUL
(TC-1
AND
AFTER;
TE-I
THRU
TE-300)
NOTE:
Refer
to
the
OVERHAUL
AND
REPLACEMENT
SCHEDULE
in
Section
15
for
time
limits
and
maintenance
checks of
the
nose
gear.
Experience
in the
field
indicates the
points
of
greatest
wear
on
the
nose
gear
are
the
upper
and
lower
bearings
in
the
barrel
assembly.
The
forces
exerted
on
the
bearings during
takeoff
and
landing
tend
to
result
in
an
oversized
condition.
The
oversized
condition
of the
upper
bearing
in
the barrel
assembly
will
result in
leakage
of
hydraulic
fluid
through
the
upper
bearing
and
O-ring.
This
will
eventually
cause
fluid
to
seep
down
through
the
felt
pad
and
out
the
lower
bearing.
When
replacement
of
the
scraper
ring
and
all
O-rings
in
the
landing
gear
fails
to
stop
leaks,
the
oversized condition
of
the
bearings
is
probable.
In
such instances the
landing
gear
should
be
overhauled. The
following
information
will
aid
in
determining
the
extent
of
landing
gear
wear
and
whether it is
possible
to
overhaul
or
necessary
to
replace
critical
landing
gear
components.
NOSE GEAR
DISASSEMBLY
WARNING:
Do
not
begin
any
disassembly
of the
nose
landing
gear
until
all
air
pressure
has been
released.
a.
Place
the
strut
in
a
near
vertical
position
to
prevent
the
hydraulic
fluid
from
spilling
when the
air
valve
assembly
(1)
is removed
(Ref.
Figure
11).
b.
Depress
the
valve
core
to
deflate the
strut
and
remove
the
air valve
assembly
(1).
c.
Remove the
nose
wheel.
Refer
to
Section
5,
NOSE
WHEEL
REMOVAL.
d. Remove
the
snap
ring
(4)
retaining
the
orifice
tube
(6).
e.
Retract the
piston
and
fork
assembly (48)
to
push
the
orifice tube
(6)
out
of the
barrel
(23).
f.
Remove
the
orifice
tube
(6).
Remove
the
O-ring (5)
and
piston
ring
(7).
g.
Invert
the
nose
gear
and
drain
out
the
hydraulic
fluid.
WARNING:
Do
not
disconnect
the
torque
knees
(37
and
46)
without
first
deflating
the
nose
gear.
The
torque
knees
provide
the
extension
stop
for the
piston
and fork
assembly (48).
When
disconnected,
the
piston
and
fork
assembly (48)
is
free
to
slide
out
of
the
barrel
(23).
h. Remove
the
cotter
pin
(40),
nut
(41),
washers
(39
and
44),
bushing (45)
and bolt
(43).
j´•
Remove the
cotter
pin
(36)
and
pins
(25
and
34)
to
disconnect the
upper
torque
knee
(37).
Remove the
cotter
pin
(50),
pins
(42
and
47)
and
washers
(49
and
51)
to
disconnect the lower
torque
knee
146).
k.
Slide
the
piston
and
fork
assembly
(48)
out
of
the
barrel
(23).
Remove
the
collar
(2)
and shim
(3).
i.
Remove the lower
snap
ring (33),
scraper
(31)
and
adapter
(32).
m.
Remove
the
O-ring
(38)
and
remove
the felt
pad
(24)
from
inside the barrel
(23).
Removal
of
the
O-ring
may
be
1.
simplified
by
using
a
hook
manufactured
from
music
wire
(Ref.
Figure 10).
Remove the
nut
(16),
washers
(17
and
19),
bushing
(18)
and
bolt
(21)
attaching
the
shimmy
damper
(20)
to
the
brace
(15).
o.
Remove
the
nut
(30),
washers
(27
and
29),
bushing (28)
and bolt
(26)
to
disconnect the
shimmy
damper
(20)
from the barrel
(23).
p.
Pull the barrel
(23)
out
of
the
brace
(15).
Jun
30/04Page
44
SECTION
5
E22