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ID
19
OPERATION
No.
ID
453-O
: Bleeding
the brake system
Op.
ID
453-O
291
T
PARTICULAR
POINTS
Bleeding
the
brake
system:
On cars produced after February
19.58, bleed the brake system with the engine idling and the car stabilised at its normal position.
Firstly:
Bleed the brake system. Secondly: Bleed the master cylinder (see Paragraphs
7 and.(l).
Adjusting
pedal
height
:
Set the distance 'a' to 1564.5
mm. by adjusting
the screw (3) (see Pl. 107).
TOOLS
BLEEDING
(cars
produced
until
February
1958).
Fill
the
reservoir
with
brake
fluid
and
check
the
level
in
order
to
top
up
as
and
when
required.
Fit
a piece
of
flexible
tubing
on the
front
brake
cylinder
bleed
tube
(this
is
to
be
found
on
the
right-hand
brake).
Place
the
other
end
of
the
flexible
tube
in
a container,
preferably
a transparent
one,
containing
a small
quantity
of
special
brake
fluid.
Unscrew
the
bleed
screw
(spanner
2141-T,
see
Pl.,
102,
fig.
4).
Get
an
assistant
to
operate
the
brake
pedal.
For
each
stroke
of
the
brake
pedal
a certain
amount
of
liquid
will
be
discharged
from
the
flexible
pipe
and
will
contain
bubbles
of air
driven
out
of the
system.
Continue
to
operate
the
pedal
until
the
fluid
is free
from
bubbles.
As
soon
as
the
fluid
is free
from
air
bubbles
tighten
the
bleed
screw
still
keeping
the
brake
pedal
under
pressure
and
the
end
of
the
flexible
pipe
in
the
fluid.
Remove
the
flexible
tubing
from
the
brake
cylinder
bleed
tube
. . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack
up
the
front
of the
car
(jacking
bracket
2505-T,
see
PI.
111).
Take
off
the
rubber
protector
caps
from
the
rear
brake
cylinder
bleed
screws
and
proceed
as
above
for
the
right-hand
rear
brake
cylinder
and
then
for
the
left-hand
rear
cylinder.
Do
not
forget
to top
up
the
reservoir
(special
brake
fluid
only)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To
check
for
leaks.
Press
on
the
pedal
as
hard
as
possible
for
about
30
seconds
to
one
minute.
If the
pedal
offers
resistance,
there
is
no
leakage.
If,
on
the
other
hand,
the
pedal
descends
more
or
less
rapidly,
there
is
a leakage
either
at the
union
or
in
a pipe.
Check
the
reservoir
as
well:
if
the
fluid
level
has
fallen
then
the
master
cylinder
sealing
cup
is
leaking.
This
unit
must
then
be
overhauled
immediately
(see
Op.
ID
453-3).
Lower
the
car
to
the
ground.
NOTE
- On
the
market
there
are
pressure
devices
by
means
of
which
continuous
bleeding
can
be
carried
out
and
which
give
good
results.
Their
use
is
recommended.
Spanner
2141-T
10 mm
spanner
Sacking
bracket
2505-T
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