d
e
f
g
h
©
Street
Crane
Co
Ltd
Ref:
D3256
rev.
B
Page
67
of
103
If
the
air
gap
is
too
large,
screw
the
three
adjustment
tubes
(14)
into
the
stator.
If
the
air
gap
is
too
small,
screw
the
adjustment
tubes
out
of
the
stator.
NOTE
:
1/6
turn
adjusts
the
air
gap
by
approx.
0.15mm
Re
‐
tighten
the
assembly
fixings
to
the
recommended
torque
value
(see
table
in
5.10.2).
Re
‐
check
the
air
gap
and
repeat
the
adjustment
procedure
if
necessary.
Test
the
brake
for
correct
operation
before
re
‐
fitting
the
outer
brake
seal
(where
fitted)
and
returning
into
service.
Figure
49
–
Adjusting
the
Hoist
Brake
Air
Gap
5.10.5
Changing
the
Brake
Disc
(brake
rotor)
/
Inspecting
the
brake
hub
The
thickness
of
the
brake
disc
can
be
measured
using
a
vernier
calliper
without
the
need
to
remove
the
brake.
Disconnect
the
power
supply
and
remove
the
brake
seal
(if
fitted).
Measure
between
the
mounting
flange
and
the
armature
plate
(Figure
50).
If
the
minimum
thickness
is
below
the
figure
given
in
the
Hoist
Brake
Data
table
(5.10.2),
the
brake
disc
should
be
replaced.
Figure
50
–
Inspecting
the
Brake
Disc
Remove
the
outer
brake
seal
(where
fitted)
and
clean
any
brake
dust
from
around
the
brake.
Loosen
the
assembly
fixings
evenly
and
remove
them
taking
care
to
support
the
brake
body.
Remove
the
brake
body,
taking
note
of
its
orientation.
The
brake
rotor
(brake
disc)
will
now
be
exposed.
Withdraw
the
brake
rotor
from
its
hub.
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
mounting
flange
is
clean
and
free
of
any
oil
or
grease.
If
the
mounting
flange
is
worn
or
excessively
scored
it
should
be
replaced.
Consult
Street
Crane
before
replacing.
Using
a
vernier
calliper,
measure
both
the
new
brake
disc
thickness
and
length
of
protrusion
of
the
adjustment
tubes
from
the
back
of
the
brake.
Summary of Contents for ZX6
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