Raytheon Beech Baron E55 - Page 304

Aircraft
Company
BARON
55
AND
58 SHOP
MANUAL
PARKING
BRAKE
VAL
VE
OVERHA
UL
a.
Remove
the
valve
seat(l)from
the
parking
brake valve
assembly (Ref. Figure
5).
b.
Remove the
elbow
(2)
from the valve
seat.
c.
Remove
the
spring (3),
washer
(4)
and ball
(5)
from
the valve
seat.
d.
Remove
the
lock
washer
(9)
from the
pin through
the
brake
valve
handle,
remove
the
spacers
(7)
on
the
arm
and
push
the
plunger
(6) through housing
and
out
through
the valve
seat
bore.
e.
Remove the
old
O-ring
from the inside
of
the
brake valve
housing.
f. Clean all
parts
in
solvent
(15,
Consumable Materials
Chart,
Section
2)
and
air
dry
all
parts.
g.
Place
a
new
O-ring
inside the brake valve
housing.
h.
Check the
valve
seat
for
wear
and distortion.
If
necessary
replace
the
valve
seat.
Check
the
parking
brake valve
for leaks
by placing
1
,500
psi
in the valve
through
the
elbow
(2).
Remove
the
pressure
and
place
it in the noule
(8).
The valve should
open
with
application
of
2
psi
or
less.
If
this is
not
the
case,
the
valve
is
not
serviceable.
i.
VALVE
SEAT
9
-----IC~e P I 1
~9-9
74
1
~4
2.
ELBOW
3.
SPRING
3
4.
WASHER
5.
BALL
2
6.
PLUNGER
7.
SPACERS
8.
NOZZLE
O
9. LOCK
WASHERS
10.
O-RING
10
6
1
TH05B
Parking
Brake Valve
Figure
5
Jun
30/04PagelO
SECTION
5
E22