d
e
f
g
h
©
Street
Crane
Co
Ltd
Page
72
of
103
Ref:
D3256
rev.
B
Before
replacing
the
brake
disc,
visually
inspect
the
end
of
the
key
between
the
brake
hub
and
shaft.
Check
the
condition
of
the
spline
on
the
brake
hub
and
ensure
there
is
no
radial
or
rotational
play
between
either
the
new
brake
disc
and
the
hub
or
the
hub
and
the
shaft.
If
the
hub
is
damaged,
worn
or
play
is
apparent,
the
hub
should
be
replaced.
Before
replacing,
consult
Street
Crane.
Ensure
the
face
of
the
motor
end
shield
is
clean
and
free
of
any
oil
or
grease.
If
the
end
shield
is
worn
or
excessively
scored
it
should
be
replaced.
Consult
Street
Crane
before
replacing.
Slide
the
new
brake
disc
(rotor)
onto
the
hub.
Replace
the
brake
body
in
the
same
orientation
as
originally
installed.
Replace
the
assembly
fixings
and
tighten
3Nm.
Check
and
adjust,
where
necessary,
the
nominal
air
gap
‘a’
and
the
hand
release
clearance
‘s’
(see
5.11.2
&
5.11.4).
Replace
the
brake
seal,
where
fitted
(see
5.11.5).
Press
the
motor
fan
onto
the
motor
shaft
and
replace
the
circlip,
replace
the
motor
fan
cowl
and
the
hand
release
lever.
Re
‐
connect
the
brake
supply
and
test
the
brake
for
correct
operation
before
returning
into
service.
5.11.4
Fitting
the
Traverse
Drive
Hand
Release
For
safety
reasons,
the
hand
release
is
spring
loaded
and
returns
to
its
original
position
(brake
applied)
automatically.
Insert
the
compression
springs
(10)
into
the
holes
of
the
armature
plate
(1).
Fit
the
washers
(11)
onto
the
hand
release
fixings
(12)
and
assemble
through
the
compression
springs
(10)
and
the
stator
(5).
Fit
the
barrel
nuts
(13)
into
the
holes
provided
in
the
hand
release
(9).
Position
the
hand
release
(9)
over
the
stator
and
tighten
the
hexagon
screws
(12)
into
the
barrel
nuts
(13)
until
the
armature
plate
moves
towards
the
stator.
Adjust
the
gap
between
the
armature
plate
and
the
stator
using
the
hexagon
hand
release
screws
(12)
to
achieve
a
dimension
of
1.0mm.
Check
the
dimension
at
three
positions
around
the
circumference.
Fit
the
complete
brake
assembly
onto
the
hoist
and
tighten
the
assembly
screws
(7)
to
3Nm.
Re
‐
adjust
the
air
gap
‘a’
in
accordance
with
section
5.11.2.
Re
‐
check
the
Hand
Release
Clearance
dimension
‘s’
(0.7mm)
and
nominal
air
gap
‘a’
(0.2
‐
0.3mm)
before
returning
into
service.
1
The
hand
release
clearance
gap,
‘s’
(0.7mm)
is
important.
The
brake
may
not
apply
correctly
if
the
clearance
is
too
small.
If
the
nominal
air
gap
‘a’
is
adjusted
at
a
later
date,
do
not
alter
the
hand
release
clearance.
Figure
56
–
Traverse
Drive
Brake
Hand
Release
Summary of Contents for ZX6
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