Festool RAS 180.03 E - Manual (Page 14)

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load safety device switches off the motor and pre-
vents it from burning out. Motor operation resumes
immediately after the load is relieved.
Temperature cut-out
To protect against overheating (burning out of mo-
tor), an electronic temperature monitoring system
has been installed. Prior to reaching a critical mo-
tor temperature, the safety electronics switches
off the motor. After a cooling time of approx. 3-5
minutes, the machine can be operated again at full
load. The machine requires less time to cool down
when idling.
LED indicator
The rotary sander is fi tted with an electronic adjust-
ing wheel and a green and red LED [1-3]. A green
lit LED indicates that the rotary sander is operating
in normal mode. A red lit LED indicates that the
motor is operating at approx. 70% overload. The
overload or temperature cut-out switches off the
motor if overloaded for longer periods.
However, alternately fl ashing green and red LEDs
indicate that the brushes are completely worn (re-
maining working hours max. 10 hours). In this case,
have an authorised after-sales service workshop
replace the carbon brushes the next day. Always
replace with special carbon brushes available in
pairs otherwise the LED indicators will not work.
7.2 Replacing the brush insert
Insert a screwdriver through the square open-
ing [3-3] to remove the brush insert.
Insert the new brush strip into the groove, adapt
the radius by bending slightly and push in fi rmly
until the brush strip is seated on the base of the
cover.
The bristles must be inclined towards the outside.
Two different brush inserts are available
- AH-RAS D 180 Poly (replacement for worn insert)
- AH-RAS D 180 Metall (for use with materials that
generate sparks)
7.3 Changing sanding pads
WARNING
Risk of injury
• Do not press the spindle stop until the drive
spindle comes to a halt.
• Do not switch on the motor when the spindle
stop is pressed in.
Sanding pads STF D 180, 2F D 180
Sanding pads STF D 180 and 2F D 180 are fi tted
with an M14 thread so that the components can be
screwed directly onto the drive spindle.
Usually the sanding pad can be unscrewed
from the drive spindle by hand after the spindle
stop [3-2] is pressed. If the sanding pad cannot
be loosened by hand, use the special face pin
wrench [2-3].

Always screw the sanding pad onto the drive
spindle by hand as this will invariably make
disc removal easier.
Sanding pad Elastik D 180
The Elastik D 180 sanding pad is secured to the
drive shaft with a clamping nut and tightened with
the face pin wrench.
7.4 Changing the abrasive
Stickfi x abrasives
Self-adhesive abrasives, such as Stickfi x sandpa-
per and sanding cloths can be affi xed to the Stickfi x
sanding pad STF D 180. The abrasives are simply
pressed onto the sanding pad and removed after
use.
Note
 Only use sanding pads if the Stickfi x adhesive
coating is undamaged.
 Before using, check whether the burr layer
has not been damaged (e.g. melted) due to
improper use.
Fiberfi x abrasives
Fiberfi x abrasives can be used on 2F D 180 and
Elastik D 180 sanding pads. Extraction hood AH-
RAS D 180 can be used in combination with sanding
pad 2F D 180 and Fiberfi x abrasives.
7.5 Dust extraction
CAUTION
Breathing in dust damages the respiratory
passage.
• Always connect the machine to a dust extractor.
• When performing work that generates dust,
always wear a dust mask.
You can connect a Festool extractor to the extrac-
tor connector [2-5]. The extractor hose in the
Festool extractor is 27 mm in diameter.
You can adapt the brush ring [2-4] to the respec-
tive working position using the additional rotary
hand grip [3-1].