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7.
BRAKING SYSTEMS
7.1.
Testing Brake Servo Diaphragm
7.1.1.
Remove
vacuum supply
line
from brake servo
fitting.
Attach
VS402.V2 vacuum tester to
vacuum
supply
port
on
servo
(fig.13).
Operate pump to create
approximately
15inHg of vacuum and
wait
for 30
seconds. No
vacuum
drop
should be observed
on the
gauge
reading.
If
the
vacuum drops
this
indicates
that
the brake servo diaphragm is
faulty.
In
this case
the
servo
should
be
removed
for overhaul
by
an
authorised
repairer
or
replaced.
7.2.
Brake Bleeding ·Assembly
of
Brake Bleeder
Kit
7.2.1. Ensure
that the
vacuum
pump
is
connected
to the
brake bleeder
reservoir in accordance with
the
assembly diagram
(fig.1 4).
Failure
to do
so
will result
in
brake fluid
being drawn
into
the
vacuum
pump.
7.3.
Brake Bleeding Procedure.
LJ
WARNING/ Familiarise
yourself
with
the
hazards of
brake
fluid
-
read
manufacturer's
instructions
on
the container. Do
not touch
the
vehicle's
brake pedal whilst bleeding
the
brakes.
7.3.1
.
Refer to the specific
vehicle
manufacturer's
instructions
for
brake
bleeding
and wheel sequence
procedure before
proceeding. If
no
specific
instructions
from
the
vehicle
manufacturer exist, follow
the
instructions
detailed
below.
7.3.2.
Remove
the cap of the
vehicle's
master
brake
fluid
reservoir.
If
the
fluid
level
is not at maximum,
top
it up.
7.3.3.
Attach
the appropriate
size
bleeding
attachment
to the
bleed nipple
on
the brake calliper of
the first
wheel,
normally
nearest to
master
brake fluid
reservoir.
7.3.4. Operate vacuum pump
until
approximately
21inHg
vacuum is created.
7.3.5.
Apply
copper grease to
the brake
bleeding nipples
before
and
after
the
brake bleeding procedure to reduce the
possibility of
seized or broken nipples
when
the brakes are next bled.
7.3.6. Open
the bleed
nipple
about a
quarter
of
a
tum.
Allow brake fluid
to be
drawn until no
air
bubbles
are
visible
in the brake
fluid
in
the
clear
hose.
7.3.7.
lighten
the bleed nipple.
7.3.8.
Remove the
attachment
from
the
brake
nipple.
7.3.9.
Repeat
the
process as necessary.
NOTE!
Check
the master brake fluid
reservoir
regularly to
ensure that the
level
does
not
drop
too far,
and top
up
as
necessary.
NOTE!
Empty bleeder
container regularly
and
DO
NOT
allow container to
overfill as brake
fluid will be
drawn
into
vacuum
pump.
LJ
WARNING! When
brake
bleeding and/or fluid changing
is
complete, test the
action of
the brake
pedal
to
ensure
that the brakes are
working
before
attempting to drive the
vehicle on
the road
and
test the
vehicle
for satisfactory performance
of the
braking
system.
7.4.
Clutch Bleeding Procedure.
7.4.1. Refer to the
relevant
vehicle manufacturer's
instructions
for clutch
bleeding
procedure.
If no
specific
instructions
from
the
vehicle
manufacturer exist, follow
the same
basic procedure
as the brake
bleeding instructions
above.
( © Jack Sealey Limited
J
Original
Language
Version
(
VS402.V2
I
Issue:
1
-
22/05/
12 )
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