Bosch PEX 400 A Instrucciones De Servicio página 9

Always hold the machine firmly when working and
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provide for a secure stance.
When sanding metal, flying sparks are produced.
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Take care that no persons are endangered. Be-
cause of the danger of fire, no combustible materi-
als should be located in the vicinity (spark flying
zone).
If your tool is equipped with a dust bag, empty it
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frequently and after completion of sanding. Be
extremely careful of dust disposal, materials in fine
particle form may be explosive. Do not throw sand-
ing dust on an open fire. Spontaneous combustion
may in time, result from mixture of oil or water with
dust particles.
Always switch the machine off and wait until it has
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come to a standstill before placing it down.
Never allow children to use the machine.
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Bosch is able to ensure flawless functioning of the
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machine only if the original accessories intended
for it are used.
Replacing the Sanding Sheet/
Sanding Plate
Before any work on the machine itself, pull the
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mains plug.
Selecting the Sanding Sheet
Depending on the material to be worked and the de-
sired material removal, various sanding sheet qualities
are to be used:
For the working of all wooden materials.
For the working of paint/enamel coats or primers and
fillers.
For the working of extremely hard materials such as
stone, marble, granite, ceramic or glass.
Replacing the Sanding Sheet
Lift the sanding sheet 7 at the side and pull it off the
sanding plate 8. Clean the sanding plate 8, if required.
Press the new sanding sheet 7 against the bottom of
the sanding plate. To ensure optimum dust extraction,
the holes of the sanding sheet must match with those
of the sanding plate.
2 609 932 202 • (02.08) T
Selection of the Sanding Plate
Depending on the application, the machine can be
equipped with sanding plates of different hardness
(see Application Table ):
– Soft sanding plate: Suitable for polishing and sen-
sitive sanding (also for curved surfaces).
– Middle sanding plate: Suitable for universal usage
on flat surfaces.
– Hard sanding plate: Suitable for high sanding per-
formance on flat surfaces.
Replacing the Sanding Plate
To replace the sanding plate 8 , pull off the sanding
sheet or polishing tool. With the Allen key 1 , loosen
and remove the screw 6 .
When placing on the sanding plate, take care
that the teeth of the drive piece engage in the re-
cesses of the sanding plate.
Hold the sanding plate and firmly tighten the screw 6
with the Allen key 1 .
Replace damaged sanding plates without delay.
Dust/Chip Vacuuming
Dust produced while working can be detrimental to
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health, inflammable or explosive. Suitable protec-
tion measures are required.
Examples: Some dusts are considered to be carci-
nogenic. Use suitable dust/chip extraction and
wear a dust protection mask.
Light metal dust can burn or explode. Always keep
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the work place clean since material mixtures are
especially dangerous.
Caution, fire hazard!
For unfavourable conditions such as fly-
ing sparks when sanding metals, sanding
dust in the dust bag, micro filter or paper
sack (or in the filter sack or filter of the
wet/dry vacuum cleaner) can self-ignite,
especially when mixed with remainders
of varnish, polyurethane or other chemi-
cal materials and when the sanded work
piece is hot after long periods of working.
Avoid overheating the object being sand-
ed as well as the machine and always
empty the dust container before pauses
in the work.
Internal Vacuuming with Dust Box
(see Fig –
A1
Attaching the dust box
Before mounting the dust box 3, pull out the plastic
slide 12. Place the dust box on the outlet piece 13 and
allow to latch. Take care that the plastic slide 12 en-
gages in the holder 11.
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