43
Samand
Adjustment and replacement
W elding
Grinding
All surfaces to be welded must first be ground clean
from paint. Use a belt grinder. When spot-welding
galvanised metal, the paint must be removed with a
wire brush and hot-air gun so that the galvanised
surface is not damaged. All-welded and plug-welded
details must be ground to an even and fine finish after
welding.
Important
Be careful not to grind away too much metal. On no
account must the strength of the material be weakened.
Use abrasive cloth P1200 or finer on external surfaces.
Coarser abrasive cloth leaves marks that will be visible
after painting.
The characteristics of the bodys deformation zones and
cabin enclosure must not be changed or become
deteriorated after repair. Therefore, it is important that
all welding work is carried out in accordance with
method descriptions and that the correct welding
method is used in the correct places. Spot-weld rather
than plug-weld if space allows. Always check the
number of spot-welds and their location before
removing the damaged part and use the same number
and locations when fitting the spare part. When spot-
welding, the diameter of the electrodes must nut
exceed 6mm. The core of the spot-weld must be at
least 5mm in diameter to ensure high strength so that a
screwdriver placed between two spot-welds can be hit
with a hammer without breaking the join. To reduce the
risk for corrosion, welding primer must always be
applied between the sheets being spot-welded together.
When carrying out MIG welding, make sure that the
grounding of the welding unit is good and connect the
ground cable as close as possible to the welding point.
This is important, as it will enable welding work to be
done without the need to remove all electronic units
from the car.
Important
If proper grounding is not ensured, electronic
components could be damaged by current surges
through the body metal.
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