SPARKY HD Professional FB 722 Notice Originale page 9

ness do not exceed the values specified on
the name plate. The maximum number of
revolutions indicated on the cup wheel must
not be less that the number of revolutions of
the machine at no load!
WARNING: Always switch off and
unplug the power tool prior to any adjustment,
servicing or maintenance.
▪
Always use the auxiliary handle and hold the
machine firmly with both hands for maximum
control over torque reaction or kickback upon
starting.
SWITCHING ON / SWITCHING Off
The concrete grinder is secured against unin-
tentional switching on.
▪ Switching on: First press the auxiliary button
(8) positioned at the front of ON/OFF switch,
then press ON/OFF switch (7). For continu-
ous operation switch (7) can be locked. In this
case while holding switch (7), press button (8)
and the release switch (7).
▪
Switching off: Release switch (7); in case the
switch is locked, first press and then release
that switch.
In case of mains drop-out (or temporary
drop-out for time t > 0.5 s), when the ON/Off
switch is in ON position, the machine should
not operate after supply recovering. To start
operating the machine, first switch off and
then switch on the lever of ON/Off switch.
WHEEL GUARD
The wheel guard (2) must always be mounted
on the machine!
ASSEMBLY, REPLACING AND AD-
JUSTING THE CUP WHEEL POSITION
Make sure the cup wheel diameter and thickness
do not exceed the values stated in the technical
specifications. The maximum admissible speed
indicated on the wheel must not be less than the
machine no load speed.
Fix the spindle (1) by pressing the lock button
(9) on the gear case.
WARNING: Never press button (9)
while the spindle is still rotating!
With this button depressed turn the spindle till its
Original instructions
pronounced going deeper. Unscrew lock nut (5)
by the lock nut wrench.
In view of the cup wheel wear and in order to
achieve optimum dust extraction a possibility is
provided to adjust the cup wheel position to the
wear of the cup wheel.
When placing a new cup wheel arrange the
components on the spindle in the following or-
der: base support washer (3); cup wheel (4);
lock nut (5) with its flat end towards the cup
wheel as shown on Fig. 1.
WARNING: Placing the lock nut (5)
with its convex end towards the cup wheel
shall make tightening the cup wheel impos-
sible.
In case the cup wheel is half worn out or more,
arrange the components on the spindle in the
following order: flat support washer (12); cup
wheel (4); lock nut (5) with its convex end to-
wards the cup wheel as shown on Fig. 2.
WARNING: After replacing the wheel,
operate the machine with the new wheel at no
load mode for minimum 30 seconds. Vibrating
or otherwise improperly rotating wheels must
be replaced immediately and discarded.
REPLACING THE BRUSH SHIELD
The rubber seal (10) provides maximum de-
creasing the dust emission in the environment.
It wears out along with the wheel. When replac-
ing the wheel, change the rubber seal as well.
Loosen the screw in bracket (11) and remove
the old rubber seal. Place the new seal, taking
care the edge of the wheel guard (2) will enter
the provided in the seal groove. Place back the
bracket (11) and fasten it.
AUXILIARY HANDLE
The auxiliary handle (6) is fastened to the gear
case through two screws. Always use the aux-
iliary handle and hold the machine firmly with
both hands.
DUST EXTRACTION
The machine can be operated only with dust ex-
traction. Wear a dust-proof mask. The vacuum
cleaner must be appropriate for suction of stone
dust. Connect the vacuum cleaner to the dust
extraction tube of the wheel guard.
7
EN