d
e
f
g
h
©
Street
Crane
Co
Ltd
Ref:
D3256
rev.
B
Page
33
of
103
3.14
CHECKING
/
ADJUSTING
THE
RATED
CAPACITY
LIMITER
The
rated
capacity
limiter
is
used
to
prevent
the
hoist
from
lifting
a
load
in
excess
of
the
rated
capacity
(safe
working
load).
If
the
hoist
is
overloaded,
the
limit
switch
will
trip
and
the
UP
direction
will
become
inactive.
The
hoist
will
be
allowed
to
lower
only.
Once
the
load
has
been
removed
then
the
limit
switch
will
automatically
reset
and
all
motions
will
become
active
again.
The
rated
capacity
limiter
is
pre
‐
set
at
the
factory
prior
despatch
and
is
set
to
rated
capacity
+7.5%.
Checking
of
the
rated
capacity
limiter
will
require
calibrated
test
weights
equal
to
the
rated
capacity
of
the
hoist
and
rated
capacity
plus
10%,
(SWL
and
SWL+10%).
Lift
the
load
just
clear
of
the
floor
with
the
test
load
attached.
The
limit
does
not
require
any
adjustment
if
the
hoist
picks
up
its
rated
capacity
(SWL)
but
does
not
lift
the
rated
capacity
+
10%
(SWL+10%).
If
the
limit
trips
either
below
or
above
these
limits,
adjust
the
limit
by
turning
the
grub
screw.
3.14.1
Adjusting
the
Rated
Capacity
Limiter
for
Proof
Loading
For
proof
load
testing
of
a
hoist
or
crane
at
a
load
greater
than
the
rated
capacity,
proceed
as
follows:
‐
Release
the
grub
screw
by
approximately
half
a
turn.
Carry
out
the
proof
load
tests
on
the
hoist
/
crane
as
required.
Attach
a
calibrated
test
load
to
the
hook
of
(Rated
Capacity
+
10%).
Lift
the
load
just
clear
of
the
floor
and
tighten
the
grub
screw
until
the
limit
switch
just
operates.
Lower
the
load
to
the
floor
and
repeat
the
lift
several
times
at
slow
hoisting
speed
making
sure
that
the
limiter
trips
each
time.
Repeat
the
test
at
rated
capacity,
this
time
ensuring
that
the
limiter
does
not
activate.
Figure
20
–
Rated
Capacity
Limiter
Summary of Contents for ZX6
Page 2: ......
Page 4: ...defgh Street Crane Co Ltd IV THIS PAGE IS INTENTIONALLY BLANK ...
Page 99: ...defgh Street Crane Co Ltd Ref D3256 rev B Page 99 of 103 NOTES ...
Page 100: ...defgh Street Crane Co Ltd Page 100 of 103 Ref D3256 rev B NOTES ...
Page 101: ......
Page 102: ......