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284
OPERATION
No.
ID
45 1-
3 : Overhauling
a brake unit
ID
19
18
19
20
21
22
23
To
adjust
the
control
lever
eccentric
adjusting
stop
:
Put
the
brake
carrier
plate
in
a vi.ce
(use
soft
jaws).
Fit
the
adjuster
wheel
(33)
and
the
adjustable
sleeves
(34
and
35)
on the
carrier
plate,
the
"wedge"
of
the
push-rod
in
its
housing
on the
fulcrum
pin
of
the
mechanical
control
iever
(4).
Place
the
movable
block
(15)
in
position
in
the
brake
carrier
plate.
Use
a small
screwdriver
to
ease
the
various
parts
into
position.
Fit
the
adjusting
shims
(32)
whose
thickness
was
determined
according
to paragraph
17b.
Fit
the
guide
plates
(31).
Tighten
the
screw
(30)
locking
the
plates
(31).
Hold
the
movable
block
(15)
horizontally
against
the
carrier
plate
in
the
vice.
Engage
the
movable
brake
block
return
spring
(28)
and
tighten
the
spring
retaining
screw
(45)
(Curs
produced
before February
1958)
Fit
a spring
pin
retaining
bush
(29)
. in
its
housing
in
the
brake
carrier
plate.
Pull
on
the
spring
(28)
by
its
ring,
using
a steel
wire
hook.
Fit
the
retaining
pin
(27)
of the
spring
(28).
Proceed
in
the
same
way
for
the
other
spring.
Fit
the
ratchet
(26)
on
the
brake
carrier
plate,
insert
the
bleed
tube
retaining
plate
(50)
(right-hand
brake
unit)
between
the
locknut
(24)
and
the
carrier
plate.
Tighten
the
screw
(25)
and
slightly
slacken
off.
Tighten
the
locknut
(24).
The
side
clearance
of
the
ratchet
must
then
be
between
0.03
and
0.05
mm
. . . . . . . . . . . . . . . . . .
Insert
the
locking
rod
(18)
in
its
guide
bush
(19)
after
greasing
the
latter.
In
the
bore
provided
in
the
locking
rod
fit
the
plunger
(20)
with
the
flat
section
on
the
spring
side,
the
plunger
spring
(Zl),
the
plunger
spring
disc
(23)
and
the
locking
rod
spring
(22).
All
these
parts
must
be
lubricated
with
graphite
grease
before
assembling.
Put
the
assembly
in
the
carrier
plate
with
the
rounded
part
of the
locking
rod
upwards
and
the
ratchet
located
in
the
fork
of
the
rod.
Compress
the
spring
and
engage
the
thrust
spring
screw
(17)
in
the
brake
carrier
plate
and
in the
hole
in
the
guide
bush.
Tighten
the
screw.
Fit
the
eccentric
adjusting
stop
(8)
of
the
control
lever.
Insert
the
screw
(spring
washers).
Operate
the
control
lever
(4)
several
times
in
order
to
check
the
operation
of the
ratchet.
The
ratchet
must
always
be
flat
against
the
adjusting
wheel
and
the
locking
rod
must
always
return
properly
after
each
tooth
passes.
If not,
change
the
locking
rod
return
spring
and
make
sure
that
it
slides
easily
in
the
guide
bush.
Also
check
the
joint
of the
ratchet
lever.
a)
After
ensuring
that
the
movable
block
is
in
contact
with
the
carrier
plate
(operate
the
control
lever
in
order
to
move
the
block
forwards)
make
sure
that
the
locking
rod
(18)
is
located
in
the
hollow
in
a tooth.
Insert
the
spanner
2129-T
in
the
hole
"a"
in
the
carrier
plate
and
make
sure
that
it
engages
with
the
adjuster
wheel
(33).
Turn
the
spanner
to
bring
the
tooth
of
the
wheel
flush
against
the
locking
rod.
Maintain
the
pressure
and
move
the
control
lever
(4).
TOOLS
r
10 mm
spanner
and
box
spanner
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