Pressure Bleeding; Dual Brake System Bleeding - Raytheon BEECH BARON 58P Maintenance Manual

BEECHCRAFT
BARON
580 AND BARON 58TC
MAINTENANCE
MANUAL
PARKING BRAKE
VALVE
I
BRAKE
RESERVOIR
PRESSURE SOURCE
Pressure
Bleeding Brake
System
Figure
201
can
get
under
seals and
cause
leaks
or
clog the
PRESSURE BLEEDING
compensating valve and
cause
the brakes
to
lock.
(F~gure
20 1!
Use either gravity flow
or
pressure
bleeding
to
bleed brakes. Connect
the hoses from
a pressure
pot to
the bleeder fitting
Using either method, the parking
brake lever and
toe
brake
on
the brake and bleed
the system from the wheel
cylinder
pedals
must
both be fully
released
to
open
the
up.
Disconnect the
pressure
equalization line
at
the
upper
compensating port in the brake
master
cylinders,
end of the
reservoir,
attach
a
hose
to
it and put the other
end of the hose in
a
large, clean container.
Using
not
more
If the brakes feel soft
or
"spongy"
after bleeding operation,
than 30
pounds
pressure,
bleed the system until all air
air
may
be trapped in the
cylinders. Remove
the brake and bubbles
are gone
~from the draining
fluid. Pumping the
lay it
on
its side. Add brake
fluid
as
needed through the
brake
pedals is
not
necessary.
bleed port and tap the brake
lightly with
a
rubber hammer
to
dislodge
any air
bublles. When air bubbles
no
longer
appear
at
the port, install the brake and
repeat
the bleeding
DUAL BRAKE SYSTEM BLEEDING
procedure.
In
airplanes having
the optional dual brake system, the
copilot's
brake system is bled
by closing the valve
on
the
GRA V/TY BLEED/NG
pressure
pot and
pumping the copilot's brake
pedals
to
change the
shuttle valve
position. This
causes
hydraulic
The reservoir
must
be kept
full during bleeding. The brake
fluid
to
be routed
through the
copilot's system and this
pedals should be
operated slowly and smoothly
to
eliminate
system should be bled
as was
the pilot's
system.
trapped air in the
master
cylinders. When
no more
air
bubbles
appear
in the fluid drained from
the bleeder plug,
After the
pilot's
and copilot's brakes have
been bled, close
close the bleeder valve.
the bleeder valve and repeat for other wheel.
32-40-00
Page
202
Nov 30/76