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7-0 MAINTENANCE
7-1 Checking Items
The following items demand special attention:
(A) Wire feed unit.
This unit is to be checked regularly at the wire feed roller and the wire nozzles, as it is of great
importance for a satisfactory welding result and a minimum of wear and tear that the wire
passes through the mechanism without any deformations of the wire or the wire feed roller.
The wire nozzle should often be checked and changed if the copper coating of the wire is
damaged on its way through the nozzles. Copper dust may totally hinder free passage
through the wire liner.
A weekly check and cleaning of the nozzles as well as the wire feed roller is recommended.
(B) Welding hose.
Great care should be taken that the welding hose is not overloaded. It should not be pulled
over sharp edges, and other heavy machines should not run over it as it may damage the wire
lines. The hose should be dismantled every week and cleaned with dry air.
(C) Welding torch.
There are many parts in the welding torch that have to be cleaned regularly. The main ones
are the contact tip and the gas nozzle. During the welding process, these parts are
bombarded with spatter that sticks in the nozzles. This may disturb the shielding gas flowing
from the gas nozzle down to the molten pool. Otherwise, if the gas nozzle is blocked up with
spatter, there is a danger that short-circuits will occur between the contact tip and the gas
nozzle. The spatter should therefore be removed regularly and spatter remover applied in
order to prevent spatter from burning into the nozzles. During the cleaning process, the gas
nozzle is removed.
REMEMBER: DO NOT CLEAN BY BEATING THE TORCH.
(D) Power source.
The rectifier and transformer should be blown out with dry air occasionally; otherwise the air
circulation will be affected by the dust.
© Welding Industries Malaysia Sdn. Bhd. reserves all rights even in the event of industrial property rights. We reserve all rights of disposal
such as copying and passing on to third parties. Specification may vary from country to country.
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