12
GLC 353/503/553 MC3Operating instructions
of 11.5 l/min. In this case the choke diameter has
to be enlarged from 0.6 to 2.0 mm or the gas
retaining unit, item 113 exchanged for item 113 a,
so that a greater flow is created at a lower
pressure.
— If the original flow meter is not connected, the
flow quantity at the gas nozzle of the welding
torch must always be checked with a suitable
flow meter.
— A simple gas flow measuring tube is available
under ref. No. 097 03 04 00.
Wire drive
Wire drive rollers, item 18, wire guide unit, item 10 and
wire inlet nozzle, item 15 are marked according to the
wire size, to prevent wrong nozzle size being used by
mistake. This also applies to the contact tips and liners
of the welding torch, which are also marked with the
wire sizes.
When changing the wire drive rolls and gear wheels,
force must not be used to mount them on the gear
shafts, e.g. hammer or similar because this might
cause damage.
Prior to installation, all parts must be cleaned and -
except the drive rolls - be greased.
The welding wire itself is threaded inside the wire drive
unit throughout the wire guide spiral, item 12, the wire
drive rollers, item 18, the wire guide piece, item 10, and
the wire inlet nozzle, item 15. The wire is transported to
the torch by actuating the torch button wire manual,
item 104 on the wire drive unit. To do this the machine
must be switched on. The pressure arms, item 7 and
item 8 must only be sufficiently pressed against the
pressure units as is necessary for the relevant wire type
and size. The adjustment is reproducible. The pressure
arms swing out for threading the wire or exchanging the
wire drive rollers. The two pressure units, item 9, have
to be adjusted equally.
The pressure units of the pressure roller brackets
must not be set at more than -3-
The brake of the wire coil holder can be adjusted with
the tightening screw, item 8. The wire coil should not
move when the motor brakes, to prevent wire windings
falling off the coil and kinking or short circuits occurring.
If the brake no longer works, the brake disk, item 7 must
be replaced!
The wire coil must be secured on the wire coil holder
with the locking button, item 2, to prevent it falling off.
Coolant
As soon as the welding torch is connected, the coolant
can be filled into the cooling system. It is absolutely
essential that distilled water is used! Do not use
chlorinated water or water with a high mineral content
because of its electrical conductivity. The cooling system
cannot be completely emptied. Therefore, to avoid
damage from frost, an anti-freeze agent must always
be added, which also protects against corrosion. Only
use Glykorol EL. CLOOS ref. No. 000 01 01 22!
A five litre container of a ready-to-use mixture of: two
parts distilled water and one part Glykorol EL
(up to - 20° C) is supplied with each water-cooled
machine. CLOOS ref No. 000 01 01 31.
The water container is filled via filling connection,
item 86. A certain vacuum must remain so that the
cooling liquid can return during water blow through
without overflowing. The drain cock, item 93, at the
rear of the machine must then be opened until the
coolant flows out. The water pipes are thereby
vented and coolant is brought to the pump.
WARNING! Avoid dry-running of the pump, even
for a short period! Otherwise the shaft seal may
be damaged.
With regard to the construction of the pump it is
important that the cooling liquid is absolutely clean.
Impurities such as sand or swart as well as sticky
residues, lubricating grease etc. may damage the
pump.
Be careful after torch repairs !
Danger! Glykorol EL
is dangerous if swallowed and
harmful to skin! Carefully wash
your hands after filling!!
Safety precaution!
Keep out of reach of children.
The water hoses are filled when the machine runs.
When using very long cable assemblies, the resulting
loss of water in the cooling water container must be
replenished. Please note the max. coolant quantity!
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