5
6.
TROUBLESHOOTING
Before
carrying
out
any
work
on
the
tool,
ensure
that
it
has
been
disconnected
from
the
drive
system
and
that
it
is
not
under
hydraulic
pressure.
WARNING!
If
you
should
require
any
additional
services
than
those
detailed
below,
please
consult
your
nearest
Technical
Service
centre.
1.
Punch
or
die
breakage.
-
Incorrect
position
of
the
sheet
metal.
It
does
not
form
a
90º
angle
with
the
punch.
-
The
flat
bar
is
not
secured
when
the
piston
retracts
-
Die
positioned
on
the
widest
side
of
the
hole
-
The
die
and
punch
are
of
different
dimensions
-
Material
to
be
punched
is
not
copper
or
aluminium
or
has
a
greater
yield
strength
than
the
maximum
strength
indicated
(37
kg/mm
2
)
-
Flat
die,
punching
curved
sheet
metal
and
vice
versus,
curved
die
punching
flat
sheet
metal.
Solution:
Replace
the
punch
and
die.
We
would
recommend
always
replacing
both
items
at
the
same
time.
2.
Oil
loss.
Oil
on
the
piston.
Damaged
o
‐
rings
or
piston
scratched
by
some
external
projection.
Solution:
Send
the
tool
to
the
nearest
Technical
Service
centre
for
repair.
3.
The
piston
does
not
retract
to
its
home
position
-
Piston
retract
spring
fatigued
or
damaged
Solution
:
replace
spring
-
Dirty
or
damaged
quick
coupling
Solution:
replace
coupling
-
Mal
function
of
the
drive
system
used
to
operate
the
tool
Solution:
repair
drive
system
In
all
cases,
we
would
advise
sending
the
machine
to
the
nearest
Technical
Service
centre
for
repair.
If
you
have
any
doubts
or
require
a
clarification,
please
do
not
hesitate
to
contact
the
LARZEP,
S.A.
Technical
Department.
Always
use
original
spares.
Any
other
part
type
could
seriously
damage
the
tool
and
void
the
guarantee.
If
despite
the
above,
the
tool
still
does
not
work
correctly,
return
it
to
the
nearest
Technical
Service
for
repair
and
fine
tuning
by
specialised
personnel.
