Triumph TR4A - Bleeding the Brake and Clutch Hydraulic Systems

RUNNING
ADJUSTMENTS
BLEEDING
THE
BRAKE
AND.
CLUTCH
FII'DRAULIC
SYSTEMS
If
a pipe
joint
has
been uncoupled,
or part
of the hydraulic
system dismantled,
the system
must
be bled to
expel air,
The
procedure
is
as follows:-
l.
Clean
the bleeder
nipple
and fit a
piece
of
rubber tube
over it,
allowingthe
tube ro
hang
in aclean
iontainerpartially
filled with
fluid,
so that
the end
of the
pipe is
below the level
of the fluid.
2.
Unscrew_the
bleeder
nipple
one complete
tum.
There
is only
one
bleeder
nipple
to each
wheel
and one
nipple on
the clutci.r
operating
cylinder.
The
position
of the
brake
bleeder nipples
is
shown
on Figs.
30
(FRONI.
The
clutch
bleeder
nippie is
shown
on Fig.
17, item
l.
NOTE.
The rear
brake bleeder
nipples
are situated
at the
top
of
the
back
plate,
and are
accessible with
the
wheels
removed.
3. Fill
the
fluid
reservoir
before
commencing
the bleeding
operation,
and keep
it
at least
half-filled
durinq
the
whol-
operation,
otherwise
air will
be
drawn inro
the-
svsrem
via
the
master
cylinder.
Do
not
use fluid that
has
been
expelled
from
the
sysrem
for
mailtahing
the
level. Always
clean rhe
area
around
the
filler
cap
before removing
it.
4,
Depress
the
pedal
quickly
and
allow it
to return
without
assistance.
Repeat
this
pumping
operation
with a
slight
38
pause
between
each depression
of the
pedal,
Observe
flow
of fluid
being discharged
into
the glass
jar
and
when
air bubbles
cease to
appear, hold
the pedal
firmly
down
r
securely
tighten
the bleeder nipple.
NOTE.
For bleeding
or replenishment
of the
system,
use
o
fluid
that has
been stored in
a container
sealed from
mosphere.
Immediately
bleeding
is
completed,
re-s
residual
fluid in
the container,
before
it is
again
stor
Engine
Beforo
filling the cooling
system
with
an anti-freeze
mixtu
or after
the engine
has been
decarbonised,
check
the tightn
of
the cylinder head
nuts
and if necessary,
tjghten
them-in I
order shown
on Fig.
52.
Re-adjust
the valve
rocker clearances
as described
on
pase
j
Fg.52