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282
OPERATION
No.
ID
45 l-3
: &erhau@
a brake
unit
ID
19
TOOLS
6
Turn
over
the
brake
carrier
plate.
Unscrew
the
locknut
(24)
and
remove
the
fulcrum
pin
(25)
of
the
ratchet
(26).
Remove
the
ratchet,
the
locknut
and
the
plate
fixing
the
bleed
tube
(50)
(on
right-hand
carrier
plate)
. . . . . . . . .
7
Remove
the
retaining
pins
(27)
from
the
movable
block
return
springs
(28).
(Pull
on the
springs
with
a steel
wire
hook).
Let
the
spring
return
slowly
in
order
to
avoid
scratching
the
ground
faces
of
the
block
and
the
carrier
plate.
Remove
the
retaining
bush
(29)
f rom
the
retaining
pins
(27)
of the
springs
(28)
(Cars produced
before February
19.58)
8
Remove
the
locking
screws
(30)
from
the
guide
plates
(31)
of the
movable
block
(15).
Remove
the
guide
plates
(31)
and
the
adjusting
washers
(32)
from
the
movable
block.
9
10
Remove
the
movable
block
and
spring
assembly
from
above
the
carrier
plate
(hold
the
adjuster
wheel
(33)
and
the
able
adjustable
thrust
sleeves
(34
and
35)
g
a ainst
the
fulcrum
of the
control
lever
(4)).
Remove
the
adjuster
wheel
and
adjustable
sleeve
assembly.
I
Remove
the
circlip
(36)
from
the
fulcrum
pin
of
the
control
lever
(4)
and
remove
the
lower
washer
or
washers
(37).
Remove
the
control
lever
(4)
and
the
lever
(5)
(left-hand
brake
unit).
Remove
the
control
lever
(4)
and
the
cup
between
the
lever
and
carrier
plate
(right-hand
brake
unit)
. . . . . . . , . . . . .
Remove
the
eccentric
adjusting
bush
(8)
from
the
control
lever
(4).
Remove
the
retaining
screw
(38)
f rom
the
return
spring
of the
control
lever
(4)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
12
13
Unscrew
the
screw
(39),
withdraw
the
fulcrum
pin
(40)
and
the
support
(41).
'I
Remove
the
screw
(39),
the
cup
(42)
a.nd
the
ball
(43)
from
the
support
(41).
Drive
out
the
needle
bearings
(44)
from
the
brake
carrier
plate
(mandrel
with
shoulder)
. . . . . . . . . . . . . . . . . . . . . . .
To
strip
the
movable
brake
shoe
block
:
a)
Remove
the
retaining
pins
(45)
of
the
movable
block
return
springs
(28).
Withdraw
the
springs
(Curs produced before February
1958)
b)
Remove
the
piston
push-rods
(46)
and
remove
the
pistons
(47).
cl
Remove
the
ring
seals
(48)from
the
cylinders
(use
hooks
of
2 mm
thick
brass
wire
with
flattened
end).
Be
careful
not
to
scratch
the
cylinder
surfaces.
d)
Remove
the
circlips
(49)
from
the
piston
push-rods
(46).
14
Clean
all
the
parts
thoroughly.
Do
not
use
any
products
containing
potassium
which
will
corrode
the
aluminium.
21 mm
spanner
Circlip
pliers
10 mm
box
spanner
Shouldered
mandrels
:
Smalldia.
= 19.5
x50
long
Large
dia.
= 25.5
x 15010ng
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