Cessna T188C - Page 115

MODEL
188
&
T188
SERIES
SERVICE
MANUAL
5-45.
WHEEL
BRAKES.
(see figure
5-4.)
5-51.
INSTALLATION
OF
WHEEL
BRAKE.
If
torque
plate
was
removed,
install
as
wheel
and
brake
are
in-
5-46.
DESCRIPTION.
A single-disc
type
brake
is
stalled
in accordance
with
paragraph
5-10.
If brake
used at
each main
wheel. The
disc is
affixed to the
disc was removed,
install
as the
wheel is
assembled
wheel.
The brake assembly
floats
laterally on
anchor
in accordance
with paragraph
5-14.
boltswhich
extend
through a
stationary
torque pla-e,
a. Place
brake assembly
in position,
sliding
anchor
held by the
axle bolts,
bolts into
torque plate.
b.
Install
back
plate.
5-47.
REMOVAL
OF WHEEL
BRAKE.
c. Fill
and bleed
brake
system.
a. Disconnect
and
drain
brake
hose,
and
protect
hose and fitting from
dirt.
5-52. CHECKING BRAKE
LININGS. Brake Linings
b. Remove
back
plate.
should
be
replaced
when
they are
worn to
a minimum
c.
Pull brake
assembly
out of torque
plate to
re-
thickness
of 3/32-inch.
Visually
compare
a 3/32-inch
move.
drill
bit,
held
adjacent
to each
lining
to
measure
thick-
ness
of
the
lining.
NOTE
5-53.
INSTALLATION
OF
BRAKE
LININGS.
To remove
the
torque plate,
the
wheel and
a. Remove
bolts,
washers
and
back plates.
axle
must be removed.
The brake
disc is
b. Pull
brake cylinder
out of torque plate
and slide
removed
as the
wheel is disassembled.
pressure
plate off
anchor bolts.
c.
Place back plate
on a table
with lining side
down
5-48.
DISASSEMBLY
OF
WHEEL
BRAKE.
Compo-
flat.
Center
a
9/64-inch
(or
slightly
smaller)
punch
nents
of the
wheel
brake
are
illustrated
in
figure
5-4,
in the
rolled
rivet,
and
hit
the
punch
crisply
with
a
which
may
be
used
as
a guide
during
disassembly
of
hammer.
Punch
out
all rivets
securing
the
linings
to
the
wheel.
Use
of
compressed
air
applied
to
the
brake
the
back
plates
and
pressure
plate
in
the
same
manner.
line
fitting
is permissible
when
removing
pistons
from
the
brake
cylinders.
NOTE
5-49.
INSPECTION
AND
CLEANING
OF
WHEEL
5-49.
INSPECTION
AND
CLEANING
OF
WHEEL
A rivet
setting
kit,
Part
No.
199-00100,
is
BRAKES.
available
from
the
Cessna
Supply
Division.
a.
Clean
all
parts
except
brake
linings
and
O-rings
This
kit
consists
of
an
anvil
and
punch.
in
dry cleaning
solvent
and
dry thoroughly.
b. Install
all
new
O-rings.
If O-ring
reuse
is
neces-
d. Clamp
the flat
sides
of the
anvil
in a
vise.
sary,
wipe
with
a
clean
cloth
saturated
in
hydraulic
e.
Align
new
lining
on
back
plate
and
place
a brake
fluid,
and
inspect
for damage.
rivet
in one
hole
with
rivet
head
in
lining.
Place
rivet
head
against
the
anvil.
NOTE
f. Center
rivet
setting
punch
on lips
of
the
rivet.
While
holding
back
plate
down
firmly
against
lining,
Thorough
cleaning
is
important.
Dirt
and
hit
punch
with
a
hammer
to
set
the
rivet.
Repeat
chips
are
the
greatest
single
cause
of
mal-
blows
on
the
punch
until
lining
is
firmly
against
the
function
in
the
hydraulic
brake
system.
back
plate.
g.
Realign
linings
on
back
plate
and
install
remain-
c.
Check
brake
linings
for
deterioration
and
max-
ing
rivets.
mum
permissible
wear.
Refer
to
applicable
para-
h.
Install
a new
lining
on
pressureplate
in the
same
graph
for
maximum
wear
limit,
manner.
d.
Inspect
brake
cylinder
bore
for
scoring.
A scored
i.
Position
pressure
plate
on
anchor
bolts
and
in-
scored
cylinder
will
leak
or
cause
rapid
O-ring
wear.
stall
brake
cylinder,
sliding
anchor
bolts
into
the
A
scored
brake
cylinder
should
be
replaced.
torque
plate.
e.
If the
anchor
bolts
are
nicked
or
gouged,
they
j.
Install
back
plate
with
bolts
and
washers.
Torque
should
be
sanded
smooth
to
prevent
binding.
They
bolts
to
value
specified
on illustration
(See
Figure
5-4).
could
bind
with
the
pressure
plate
or
torque
plate.
Bolts
have
sell-locking
threads.
When
new
anchor
bolts
are
to
be
installed,
press
out
the
old
bolts
and
Installanew
bolts
with
a soft
mallet.
5-54.
BLEEDING
OF
BRAKE
SYSTEM.
Standard
f.
Inspect
wheel
brake
discs
for
a
minimum
allow-
bleeding,
with
a clean
hydraulic
pressuresource
con-
able
thickness
of
0.
340-inch
on
the
164-15A
disc
nected
to
the
wheel
cylinder
bleeder
fitting,
is
recom-
(8.
0
0x6)
wheel,
0.
287-inch
on
the
164-30
disc
(7.
50x
mended.
10)
wheel,
0.
163-inch'on
the
164-31
disc
(7.
50x10)
a.
Remove
master
cylinder
filler
plug
and
screw
wheel,
and
0.340-inch
on
the
164-27A
disc
(8.
00x8)
a flexible
hose
with
a suitable
fitting
into
the
filler
wheel.
hole.
Immerse
the
free
end
of
the
hose
in
a
can
con-
taining
enough
hydraulic
fluid
to
cover
the
end
of the
5-50.
REASSEMBLY
OF
WHEEL
BRAKES,
Lubri-
hose.
cate
parts
with
the
type
of
hydraulic
fluid
used
in the
system
and
assemble
components
with
care
to
pre-
NOTE
vent
damage
to
O-rings.
Use
figure
5-4
as
a
guide
during
assembly
of the
wheel
brake.
A
capped
bleeder
valve
is
provided
in
the
wheel
cylinder.
Revision
1
5-33